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perf/core improvements and fixes:

Browse source 
- Allow vendors to provide JSON files describing PMU events, that then
   get parsed to generate C tables that are linked against perf, allowing
   the use of the names in their documentations, such as:
 
   # perf list l1d
 
   List of pre-defined events (to be used in -e):
 
   Cache:
     l1d.replacement
          [L1D data line replacements]
     l1d_pend_miss.fb_full
          [Cycles a demand request was blocked due to Fill Buffers inavailability]
     l1d_pend_miss.pending
          [L1D miss oustandings duration in cycles]
     l1d_pend_miss.pending_cycles
          [Cycles with L1D load Misses outstanding]
     l1d_pend_miss.pending_cycles_any
          [Cycles with L1D load Misses outstanding from any thread on physical core]
     l2_trans.l1d_wb
          [L1D writebacks that access L2 cache]
 
   Pipeline:
     cycle_activity.cycles_l1d_miss
          [Cycles while L1 cache miss demand load is outstanding]
     cycle_activity.cycles_l1d_pending
          [Cycles while L1 cache miss demand load is outstanding]
     cycle_activity.stalls_l1d_miss
          [Execution stalls while L1 cache miss demand load is outstanding]
     cycle_activity.stalls_l1d_pending
          [Execution stalls while L1 cache miss demand load is outstanding]
 
   The above example was done on a Broadwell based ThinkPad t450s after
   downloading and installing such JSON files which will be added to the
   tools/perf/pmu-events/ directory in a subsequent patchkit.
 
   Now one can use those names with -e/--event in all 'perf tools'.
   (Andi Kleen, Sukadev Bhattiprolu)
 
 - Add a missing pointer dereference in 'perf probe' (Colin Ian King)
 
 - Add support for building host programs to be used in generating files
   to be used in the build process, such as fixdep and jevents, fixing
   the usage of these features in a cross compilation setup (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-20161003' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes:

- Allow vendors to provide JSON files describing PMU events, that then
  get parsed to generate C tables that are linked against perf, allowing
  the use of the names in their documentations, such as:

  # perf list l1d

  List of pre-defined events (to be used in -e):

  Cache:
    l1d.replacement
         [L1D data line replacements]
    l1d_pend_miss.fb_full
         [Cycles a demand request was blocked due to Fill Buffers inavailability]
    l1d_pend_miss.pending
         [L1D miss oustandings duration in cycles]
    l1d_pend_miss.pending_cycles
         [Cycles with L1D load Misses outstanding]
    l1d_pend_miss.pending_cycles_any
         [Cycles with L1D load Misses outstanding from any thread on physical core]
    l2_trans.l1d_wb
         [L1D writebacks that access L2 cache]

  Pipeline:
    cycle_activity.cycles_l1d_miss
         [Cycles while L1 cache miss demand load is outstanding]
    cycle_activity.cycles_l1d_pending
         [Cycles while L1 cache miss demand load is outstanding]
    cycle_activity.stalls_l1d_miss
         [Execution stalls while L1 cache miss demand load is outstanding]
    cycle_activity.stalls_l1d_pending
         [Execution stalls while L1 cache miss demand load is outstanding]

  The above example was done on a Broadwell based ThinkPad t450s after
  downloading and installing such JSON files which will be added to the
  tools/perf/pmu-events/ directory in a subsequent patchkit.

  Now one can use those names with -e/--event in all 'perf tools'.
  (Andi Kleen, Sukadev Bhattiprolu)

- Add a missing pointer dereference in 'perf probe' (Colin Ian King)

- Add support for building host programs to be used in generating files
  to be used in the build process, such as fixdep and jevents, fixing
  the usage of these features in a cross compilation setup (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2016-10-04 10:04:47 +02:00
parent 597f03f9d1 b42c7369e3
commit 8657355f5b
32 changed files with 1926 additions and 66 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
tools/build/Build
View file

@ -1 +1,3 @@
hostprogs := fixdep
fixdep-y := fixdep.o

5
tools/build/Build.include
View file

@ -90,3 +90,8 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
# - per object C flags
# - BUILD_STR macro to allow '-D"$(variable)"' constructs
c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
###
## HOSTCC C flags
host_c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))

8
tools/build/Makefile
View file

@ -14,6 +14,12 @@ endef
$(call allow-override,CC,$(CROSS_COMPILE)gcc)
$(call allow-override,LD,$(CROSS_COMPILE)ld)
HOSTCC ?= gcc
HOSTLD ?= ld
HOSTAR ?= ar
export HOSTCC HOSTLD HOSTAR
ifeq ($(V),1)
Q =
else
@ -36,7 +42,7 @@ $(OUTPUT)fixdep-in.o: FORCE
$(Q)$(MAKE) $(build)=fixdep
$(OUTPUT)fixdep: $(OUTPUT)fixdep-in.o
$(QUIET_LINK)$(CC) $(LDFLAGS) -o $@ $<
$(QUIET_LINK)$(HOSTCC) $(LDFLAGS) -o $@ $<
FORCE:

19
tools/build/Makefile.build
View file

@ -58,6 +58,9 @@ quiet_cmd_mkdir = MKDIR $(dir $@)
quiet_cmd_cc_o_c = CC $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
quiet_cmd_host_cc_o_c = HOSTCC $@
cmd_host_cc_o_c = $(HOSTCC) $(host_c_flags) -c -o $@ $<
quiet_cmd_cpp_i_c = CPP $@
cmd_cpp_i_c = $(CC) $(c_flags) -E -o $@ $<
@ -70,16 +73,24 @@ quiet_cmd_gen = GEN $@
# If there's nothing to link, create empty $@ object.
quiet_cmd_ld_multi = LD $@
cmd_ld_multi = $(if $(strip $(obj-y)),\
$(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)
$(LD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(AR) rcs $@)
quiet_cmd_host_ld_multi = HOSTLD $@
cmd_host_ld_multi = $(if $(strip $(obj-y)),\
$(HOSTLD) -r -o $@ $(filter $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@)
ifneq ($(filter $(obj),$(hostprogs)),)
host = host_
endif
# Build rules
$(OUTPUT)%.o: %.c FORCE
$(call rule_mkdir)
$(call if_changed_dep,cc_o_c)
$(call if_changed_dep,$(host)cc_o_c)
$(OUTPUT)%.o: %.S FORCE
$(call rule_mkdir)
$(call if_changed_dep,cc_o_c)
$(call if_changed_dep,$(host)cc_o_c)
$(OUTPUT)%.i: %.c FORCE
$(call rule_mkdir)
@ -119,7 +130,7 @@ $(sort $(subdir-obj-y)): $(subdir-y) ;
$(in-target): $(obj-y) FORCE
$(call rule_mkdir)
$(call if_changed,ld_multi)
$(call if_changed,$(host)ld_multi)
__build: $(in-target)
@:

4
tools/build/Makefile.include
View file

@ -1,10 +1,6 @@
build := -f $(srctree)/tools/build/Makefile.build dir=. obj
ifdef CROSS_COMPILE
fixdep:
else
fixdep:
$(Q)$(MAKE) -C $(srctree)/tools/build CFLAGS= LDFLAGS= $(OUTPUT)fixdep
endif
.PHONY: fixdep

16
tools/lib/subcmd/pager.c
View file

@ -3,6 +3,7 @@
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include "pager.h"
#include "run-command.h"
#include "sigchain.h"
@ -14,6 +15,7 @@
*/
static int spawned_pager;
static int pager_columns;
void pager_init(const char *pager_env)
{
@ -58,9 +60,12 @@ static void wait_for_pager_signal(int signo)
void setup_pager(void)
{
const char *pager = getenv(subcmd_config.pager_env);
struct winsize sz;
if (!isatty(1))
return;
if (ioctl(1, TIOCGWINSZ, &sz) == 0)
pager_columns = sz.ws_col;
if (!pager)
pager = getenv("PAGER");
if (!(pager || access("/usr/bin/pager", X_OK)))
@ -98,3 +103,14 @@ int pager_in_use(void)
{
return spawned_pager;
}
int pager_get_columns(void)
{
char *s;
s = getenv("COLUMNS");
if (s)
return atoi(s);
return (pager_columns ? pager_columns : 80) - 2;
}

1
tools/lib/subcmd/pager.h
View file

@ -5,5 +5,6 @@ extern void pager_init(const char *pager_env);
extern void setup_pager(void);
extern int pager_in_use(void);
extern int pager_get_columns(void);
#endif /* __SUBCMD_PAGER_H */

12
tools/perf/Documentation/perf-list.txt
View file

@ -8,13 +8,23 @@ perf-list - List all symbolic event types
SYNOPSIS
--------
[verse]
'perf list' [hw|sw|cache|tracepoint|pmu|event_glob]
'perf list' [--no-desc] [--long-desc] [hw|sw|cache|tracepoint|pmu|event_glob]
DESCRIPTION
-----------
This command displays the symbolic event types which can be selected in the
various perf commands with the -e option.
OPTIONS
-------
--no-desc::
Don't print descriptions.
-v::
--long-desc::
Print longer event descriptions.
[[EVENT_MODIFIERS]]
EVENT MODIFIERS
---------------

34
tools/perf/Makefile.perf
View file

@ -144,6 +144,10 @@ $(call allow-override,LD,$(CROSS_COMPILE)ld)
LD += $(EXTRA_LDFLAGS)
HOSTCC ?= gcc
HOSTLD ?= ld
HOSTAR ?= ar
PKG_CONFIG = $(CROSS_COMPILE)pkg-config
RM = rm -f
@ -345,8 +349,18 @@ strip: $(PROGRAMS) $(OUTPUT)perf
PERF_IN := $(OUTPUT)perf-in.o
export srctree OUTPUT RM CC LD AR CFLAGS V BISON FLEX AWK
export HOSTCC HOSTLD HOSTAR
include $(srctree)/tools/build/Makefile.include
JEVENTS := $(OUTPUT)pmu-events/jevents
JEVENTS_IN := $(OUTPUT)pmu-events/jevents-in.o
PMU_EVENTS_IN := $(OUTPUT)pmu-events/pmu-events-in.o
export JEVENTS
build := -f $(srctree)/tools/build/Makefile.build dir=. obj
$(PERF_IN): prepare FORCE
@(test -f ../../include/uapi/linux/perf_event.h && ( \
(diff -B ../include/uapi/linux/perf_event.h ../../include/uapi/linux/perf_event.h >/dev/null) \
@ -443,9 +457,18 @@ $(PERF_IN): prepare FORCE
|| echo "Warning: tools/include/uapi/linux/mman.h differs from kernel" >&2 )) || true
$(Q)$(MAKE) $(build)=perf
$(OUTPUT)perf: $(PERFLIBS) $(PERF_IN) $(LIBTRACEEVENT_DYNAMIC_LIST)
$(JEVENTS_IN): FORCE
$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=pmu-events obj=jevents
$(JEVENTS): $(JEVENTS_IN)
$(QUIET_LINK)$(HOSTCC) $(JEVENTS_IN) -o $@
$(PMU_EVENTS_IN): $(JEVENTS) FORCE
$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=pmu-events obj=pmu-events
$(OUTPUT)perf: $(PERFLIBS) $(PERF_IN) $(PMU_EVENTS_IN) $(LIBTRACEEVENT_DYNAMIC_LIST)
$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS) \
$(PERF_IN) $(LIBS) -o $@
$(PERF_IN) $(PMU_EVENTS_IN) $(LIBS) -o $@
$(GTK_IN): fixdep FORCE
$(Q)$(MAKE) $(build)=gtk
@ -474,6 +497,8 @@ perf.spec $(SCRIPTS) \
ifneq ($(OUTPUT),)
%.o: $(OUTPUT)%.o
@echo " # Redirected target $@ => $(OUTPUT)$@"
pmu-events/%.o: $(OUTPUT)pmu-events/%.o
@echo " # Redirected target $@ => $(OUTPUT)$@"
util/%.o: $(OUTPUT)util/%.o
@echo " # Redirected target $@ => $(OUTPUT)$@"
bench/%.o: $(OUTPUT)bench/%.o
@ -729,10 +754,11 @@ clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clea
$(call QUIET_CLEAN, core-objs) $(RM) $(LIB_FILE) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(LANG_BINDINGS)
$(Q)find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
$(Q)$(RM) $(OUTPUT).config-detected
$(call QUIET_CLEAN, core-progs) $(RM) $(ALL_PROGRAMS) perf perf-read-vdso32 perf-read-vdsox32
$(call QUIET_CLEAN, core-progs) $(RM) $(ALL_PROGRAMS) perf perf-read-vdso32 perf-read-vdsox32 $(OUTPUT)pmu-events/jevents
$(call QUIET_CLEAN, core-gen) $(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo $(OUTPUT)common-cmds.h TAGS tags cscope* $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)FEATURE-DUMP $(OUTPUT)util/*-bison* $(OUTPUT)util/*-flex* \
$(OUTPUT)util/intel-pt-decoder/inat-tables.c $(OUTPUT)fixdep \
$(OUTPUT)tests/llvm-src-{base,kbuild,prologue,relocation}.c
$(OUTPUT)tests/llvm-src-{base,kbuild,prologue,relocation}.c \
$(OUTPUT)pmu-events/pmu-events.c
$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) clean
$(python-clean)

11
tools/perf/arch/powerpc/util/header.c
View file

@ -32,3 +32,14 @@ get_cpuid(char *buffer, size_t sz)
}
return -1;
}
char *
get_cpuid_str(void)
{
char *bufp;
if (asprintf(&bufp, "%.8lx", mfspr(SPRN_PVR)) < 0)
bufp = NULL;
return bufp;
}

24
tools/perf/arch/x86/util/header.c
View file

@ -19,8 +19,8 @@ cpuid(unsigned int op, unsigned int *a, unsigned int *b, unsigned int *c,
: "a" (op));
}
int
get_cpuid(char *buffer, size_t sz)
static int
__get_cpuid(char *buffer, size_t sz, const char *fmt)
{
unsigned int a, b, c, d, lvl;
int family = -1, model = -1, step = -1;
@ -48,7 +48,7 @@ get_cpuid(char *buffer, size_t sz)
if (family >= 0x6)
model += ((a >> 16) & 0xf) << 4;
}
nb = scnprintf(buffer, sz, "%s,%u,%u,%u$", vendor, family, model, step);
nb = scnprintf(buffer, sz, fmt, vendor, family, model, step);
/* look for end marker to ensure the entire data fit */
if (strchr(buffer, '$')) {
@ -57,3 +57,21 @@ get_cpuid(char *buffer, size_t sz)
}
return -1;
}
int
get_cpuid(char *buffer, size_t sz)
{
return __get_cpuid(buffer, sz, "%s,%u,%u,%u$");
}
char *
get_cpuid_str(void)
{
char *buf = malloc(128);
if (__get_cpuid(buf, 128, "%s-%u-%X$") < 0) {
free(buf);
return NULL;
}
return buf;
}

20
tools/perf/builtin-list.c
View file

@ -16,16 +16,23 @@
#include "util/pmu.h"
#include <subcmd/parse-options.h>
static bool desc_flag = true;
int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
{
int i;
bool raw_dump = false;
bool long_desc_flag = false;
struct option list_options[] = {
OPT_BOOLEAN(0, "raw-dump", &raw_dump, "Dump raw events"),
OPT_BOOLEAN('d', "desc", &desc_flag,
"Print extra event descriptions. --no-desc to not print."),
OPT_BOOLEAN('v', "long-desc", &long_desc_flag,
"Print longer event descriptions."),
OPT_END()
};
const char * const list_usage[] = {
"perf list [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
"perf list [<options>] [hw|sw|cache|tracepoint|pmu|sdt|event_glob]",
NULL
};
@ -40,7 +47,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
printf("\nList of pre-defined events (to be used in -e):\n\n");
if (argc == 0) {
print_events(NULL, raw_dump);
print_events(NULL, raw_dump, !desc_flag, long_desc_flag);
return 0;
}
@ -61,14 +68,16 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
strcmp(argv[i], "hwcache") == 0)
print_hwcache_events(NULL, raw_dump);
else if (strcmp(argv[i], "pmu") == 0)
print_pmu_events(NULL, raw_dump);
print_pmu_events(NULL, raw_dump, !desc_flag,
long_desc_flag);
else if (strcmp(argv[i], "sdt") == 0)
print_sdt_events(NULL, NULL, raw_dump);
else if ((sep = strchr(argv[i], ':')) != NULL) {
int sep_idx;
if (sep == NULL) {
print_events(argv[i], raw_dump);
print_events(argv[i], raw_dump, !desc_flag,
long_desc_flag);
continue;
}
sep_idx = sep - argv[i];
@ -90,7 +99,8 @@ int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
print_symbol_events(s, PERF_TYPE_SOFTWARE,
event_symbols_sw, PERF_COUNT_SW_MAX, raw_dump);
print_hwcache_events(s, raw_dump);
print_pmu_events(s, raw_dump);
print_pmu_events(s, raw_dump, !desc_flag,
long_desc_flag);
print_tracepoint_events(NULL, s, raw_dump);
print_sdt_events(NULL, s, raw_dump);
free(s);

13
tools/perf/pmu-events/Build Normal file
View file

@ -0,0 +1,13 @@
hostprogs := jevents
jevents-y += json.o jsmn.o jevents.o
pmu-events-y += pmu-events.o
JDIR = pmu-events/arch/$(ARCH)
JSON = $(shell [ -d $(JDIR) ] && \
find $(JDIR) -name '*.json' -o -name 'mapfile.csv')
#
# Locate/process JSON files in pmu-events/arch/
# directory and create tables in pmu-events.c.
#
$(OUTPUT)pmu-events/pmu-events.c: $(JSON) $(JEVENTS)
$(Q)$(call echo-cmd,gen)$(JEVENTS) $(ARCH) pmu-events/arch $(OUTPUT)pmu-events/pmu-events.c $(V)

147
tools/perf/pmu-events/README Normal file
View file

@ -0,0 +1,147 @@
The contents of this directory allow users to specify PMU events in their
CPUs by their symbolic names rather than raw event codes (see example below).
The main program in this directory, is the 'jevents', which is built and
executed _BEFORE_ the perf binary itself is built.
The 'jevents' program tries to locate and process JSON files in the directory
tree tools/perf/pmu-events/arch/foo.
- Regular files with '.json' extension in the name are assumed to be
JSON files, each of which describes a set of PMU events.
- Regular files with basename starting with 'mapfile.csv' are assumed
to be a CSV file that maps a specific CPU to its set of PMU events.
(see below for mapfile format)
- Directories are traversed, but all other files are ignored.
The PMU events supported by a CPU model are expected to grouped into topics
such as Pipelining, Cache, Memory, Floating-point etc. All events for a topic
should be placed in a separate JSON file - where the file name identifies
the topic. Eg: "Floating-point.json".
All the topic JSON files for a CPU model/family should be in a separate
sub directory. Thus for the Silvermont X86 CPU:
$ ls tools/perf/pmu-events/arch/x86/Silvermont_core
Cache.json Memory.json Virtual-Memory.json
Frontend.json Pipeline.json
Using the JSON files and the mapfile, 'jevents' generates the C source file,
'pmu-events.c', which encodes the two sets of tables:
- Set of 'PMU events tables' for all known CPUs in the architecture,
(one table like the following, per JSON file; table name 'pme_power8'
is derived from JSON file name, 'power8.json').
struct pmu_event pme_power8[] = {
...
{
.name = "pm_1plus_ppc_cmpl",
.event = "event=0x100f2",
.desc = "1 or more ppc insts finished,",
},
...
}
- A 'mapping table' that maps each CPU of the architecture, to its
'PMU events table'
struct pmu_events_map pmu_events_map[] = {
{
.cpuid = "004b0000",
.version = "1",
.type = "core",
.table = pme_power8
},
...
};
After the 'pmu-events.c' is generated, it is compiled and the resulting
'pmu-events.o' is added to 'libperf.a' which is then used to build perf.
NOTES:
1. Several CPUs can support same set of events and hence use a common
JSON file. Hence several entries in the pmu_events_map[] could map
to a single 'PMU events table'.
2. The 'pmu-events.h' has an extern declaration for the mapping table
and the generated 'pmu-events.c' defines this table.
3. _All_ known CPU tables for architecture are included in the perf
binary.
At run time, perf determines the actual CPU it is running on, finds the
matching events table and builds aliases for those events. This allows
users to specify events by their name:
$ perf stat -e pm_1plus_ppc_cmpl sleep 1
where 'pm_1plus_ppc_cmpl' is a Power8 PMU event.
In case of errors when processing files in the tools/perf/pmu-events/arch
directory, 'jevents' tries to create an empty mapping file to allow the perf
build to succeed even if the PMU event aliases cannot be used.
However some errors in processing may cause the perf build to fail.
Mapfile format
===============
The mapfile enables multiple CPU models to share a single set of PMU events.
It is required even if such mapping is 1:1.
The mapfile.csv format is expected to be:
Header line
CPUID,Version,Dir/path/name,Type
where:
Comma:
is the required field delimiter (i.e other fields cannot
have commas within them).
Comments:
Lines in which the first character is either '\n' or '#'
are ignored.
Header line
The header line is the first line in the file, which is
always _IGNORED_. It can empty.
CPUID:
CPUID is an arch-specific char string, that can be used
to identify CPU (and associate it with a set of PMU events
it supports). Multiple CPUIDS can point to the same
File/path/name.json.
Example:
CPUID == 'GenuineIntel-6-2E' (on x86).
CPUID == '004b0100' (PVR value in Powerpc)
Version:
is the Version of the mapfile.
Dir/path/name:
is the pathname to the directory containing the CPU's JSON
files, relative to the directory containing the mapfile.csv
Type:
indicates whether the events or "core" or "uncore" events.
Eg:
$ grep Silvermont tools/perf/pmu-events/arch/x86/mapfile.csv
GenuineIntel-6-37,V13,Silvermont_core,core
GenuineIntel-6-4D,V13,Silvermont_core,core
GenuineIntel-6-4C,V13,Silvermont_core,core
i.e the three CPU models use the JSON files (i.e PMU events) listed
in the directory 'tools/perf/pmu-events/arch/x86/Silvermont_core'.

812
tools/perf/pmu-events/jevents.c Normal file
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@ -0,0 +1,812 @@
#define _XOPEN_SOURCE 500 /* needed for nftw() */
#define _GNU_SOURCE /* needed for asprintf() */
/* Parse event JSON files */
/*
* Copyright (c) 2014, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <stdarg.h>
#include <libgen.h>
#include <dirent.h>
#include <sys/time.h> /* getrlimit */
#include <sys/resource.h> /* getrlimit */
#include <ftw.h>
#include <sys/stat.h>
#include "jsmn.h"
#include "json.h"
#include "jevents.h"
#ifndef __maybe_unused
#define __maybe_unused __attribute__((unused))
#endif
int verbose;
char *prog;
int eprintf(int level, int var, const char *fmt, ...)
{
int ret;
va_list args;
if (var < level)
return 0;
va_start(args, fmt);
ret = vfprintf(stderr, fmt, args);
va_end(args);
return ret;
}
__attribute__((weak)) char *get_cpu_str(void)
{
return NULL;
}
static void addfield(char *map, char **dst, const char *sep,
const char *a, jsmntok_t *bt)
{
unsigned int len = strlen(a) + 1 + strlen(sep);
int olen = *dst ? strlen(*dst) : 0;
int blen = bt ? json_len(bt) : 0;
char *out;
out = realloc(*dst, len + olen + blen);
if (!out) {
/* Don't add field in this case */
return;
}
*dst = out;
if (!olen)
*(*dst) = 0;
else
strcat(*dst, sep);
strcat(*dst, a);
if (bt)
strncat(*dst, map + bt->start, blen);
}
static void fixname(char *s)
{
for (; *s; s++)
*s = tolower(*s);
}
static void fixdesc(char *s)
{
char *e = s + strlen(s);
/* Remove trailing dots that look ugly in perf list */
--e;
while (e >= s && isspace(*e))
--e;
if (*e == '.')
*e = 0;
}
static struct msrmap {
const char *num;
const char *pname;
} msrmap[] = {
{ "0x3F6", "ldlat=" },
{ "0x1A6", "offcore_rsp=" },
{ "0x1A7", "offcore_rsp=" },
{ "0x3F7", "frontend=" },
{ NULL, NULL }
};
static struct field {
const char *field;
const char *kernel;
} fields[] = {
{ "EventCode", "event=" },
{ "UMask", "umask=" },
{ "CounterMask", "cmask=" },
{ "Invert", "inv=" },
{ "AnyThread", "any=" },
{ "EdgeDetect", "edge=" },
{ "SampleAfterValue", "period=" },
{ NULL, NULL }
};
static void cut_comma(char *map, jsmntok_t *newval)
{
int i;
/* Cut off everything after comma */
for (i = newval->start; i < newval->end; i++) {
if (map[i] == ',')
newval->end = i;
}
}
static int match_field(char *map, jsmntok_t *field, int nz,
char **event, jsmntok_t *val)
{
struct field *f;
jsmntok_t newval = *val;
for (f = fields; f->field; f++)
if (json_streq(map, field, f->field) && nz) {
cut_comma(map, &newval);
addfield(map, event, ",", f->kernel, &newval);
return 1;
}
return 0;
}
static struct msrmap *lookup_msr(char *map, jsmntok_t *val)
{
jsmntok_t newval = *val;
static bool warned;
int i;
cut_comma(map, &newval);
for (i = 0; msrmap[i].num; i++)
if (json_streq(map, &newval, msrmap[i].num))
return &msrmap[i];
if (!warned) {
warned = true;
pr_err("%s: Unknown MSR in event file %.*s\n", prog,
json_len(val), map + val->start);
}
return NULL;
}
#define EXPECT(e, t, m) do { if (!(e)) { \
jsmntok_t *loc = (t); \
if (!(t)->start && (t) > tokens) \
loc = (t) - 1; \
pr_err("%s:%d: " m ", got %s\n", fn, \
json_line(map, loc), \
json_name(t)); \
goto out_free; \
} } while (0)
#define TOPIC_DEPTH 256
static char *topic_array[TOPIC_DEPTH];
static int topic_level;
static char *get_topic(void)
{
char *tp_old, *tp = NULL;
int i;
for (i = 0; i < topic_level + 1; i++) {
int n;
tp_old = tp;
n = asprintf(&tp, "%s%s", tp ?: "", topic_array[i]);
if (n < 0) {
pr_info("%s: asprintf() error %s\n", prog);
return NULL;
}
free(tp_old);
}
for (i = 0; i < (int) strlen(tp); i++) {
char c = tp[i];
if (c == '-')
tp[i] = ' ';
else if (c == '.') {
tp[i] = '\0';
break;
}
}
return tp;
}
static int add_topic(int level, char *bname)
{
char *topic;
level -= 2;
if (level >= TOPIC_DEPTH)
return -EINVAL;
topic = strdup(bname);
if (!topic) {
pr_info("%s: strdup() error %s for file %s\n", prog,
strerror(errno), bname);
return -ENOMEM;
}
free(topic_array[topic_level]);
topic_array[topic_level] = topic;
topic_level = level;
return 0;
}
struct perf_entry_data {
FILE *outfp;
char *topic;
};
static int close_table;
static void print_events_table_prefix(FILE *fp, const char *tblname)
{
fprintf(fp, "struct pmu_event %s[] = {\n", tblname);
close_table = 1;
}
static int print_events_table_entry(void *data, char *name, char *event,
char *desc, char *long_desc)
{
struct perf_entry_data *pd = data;
FILE *outfp = pd->outfp;
char *topic = pd->topic;
/*
* TODO: Remove formatting chars after debugging to reduce
* string lengths.
*/
fprintf(outfp, "{\n");
fprintf(outfp, "\t.name = \"%s\",\n", name);
fprintf(outfp, "\t.event = \"%s\",\n", event);
fprintf(outfp, "\t.desc = \"%s\",\n", desc);
fprintf(outfp, "\t.topic = \"%s\",\n", topic);
if (long_desc && long_desc[0])
fprintf(outfp, "\t.long_desc = \"%s\",\n", long_desc);
fprintf(outfp, "},\n");
return 0;
}
static void print_events_table_suffix(FILE *outfp)
{
fprintf(outfp, "{\n");
fprintf(outfp, "\t.name = 0,\n");
fprintf(outfp, "\t.event = 0,\n");
fprintf(outfp, "\t.desc = 0,\n");
fprintf(outfp, "},\n");
fprintf(outfp, "};\n");
close_table = 0;
}
static struct fixed {
const char *name;
const char *event;
} fixed[] = {
{ "inst_retired.any", "event=0xc0" },
{ "cpu_clk_unhalted.thread", "event=0x3c" },
{ "cpu_clk_unhalted.thread_any", "event=0x3c,any=1" },
{ NULL, NULL},
};
/*
* Handle different fixed counter encodings between JSON and perf.
*/
static char *real_event(const char *name, char *event)
{
int i;
for (i = 0; fixed[i].name; i++)
if (!strcasecmp(name, fixed[i].name))
return (char *)fixed[i].event;
return event;
}
/* Call func with each event in the json file */
int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
char *long_desc),
void *data)
{
int err = -EIO;
size_t size;
jsmntok_t *tokens, *tok;
int i, j, len;
char *map;
if (!fn)
return -ENOENT;
tokens = parse_json(fn, &map, &size, &len);
if (!tokens)
return -EIO;
EXPECT(tokens->type == JSMN_ARRAY, tokens, "expected top level array");
tok = tokens + 1;
for (i = 0; i < tokens->size; i++) {
char *event = NULL, *desc = NULL, *name = NULL;
char *long_desc = NULL;
char *extra_desc = NULL;
struct msrmap *msr = NULL;
jsmntok_t *msrval = NULL;
jsmntok_t *precise = NULL;
jsmntok_t *obj = tok++;
EXPECT(obj->type == JSMN_OBJECT, obj, "expected object");
for (j = 0; j < obj->size; j += 2) {
jsmntok_t *field, *val;
int nz;
field = tok + j;
EXPECT(field->type == JSMN_STRING, tok + j,
"Expected field name");
val = tok + j + 1;
EXPECT(val->type == JSMN_STRING, tok + j + 1,
"Expected string value");
nz = !json_streq(map, val, "0");
if (match_field(map, field, nz, &event, val)) {
/* ok */
} else if (json_streq(map, field, "EventName")) {
addfield(map, &name, "", "", val);
} else if (json_streq(map, field, "BriefDescription")) {
addfield(map, &desc, "", "", val);
fixdesc(desc);
} else if (json_streq(map, field,
"PublicDescription")) {
addfield(map, &long_desc, "", "", val);
fixdesc(long_desc);
} else if (json_streq(map, field, "PEBS") && nz) {
precise = val;
} else if (json_streq(map, field, "MSRIndex") && nz) {
msr = lookup_msr(map, val);
} else if (json_streq(map, field, "MSRValue")) {
msrval = val;
} else if (json_streq(map, field, "Errata") &&
!json_streq(map, val, "null")) {
addfield(map, &extra_desc, ". ",
" Spec update: ", val);
} else if (json_streq(map, field, "Data_LA") && nz) {
addfield(map, &extra_desc, ". ",
" Supports address when precise",
NULL);
}
/* ignore unknown fields */
}
if (precise && desc && !strstr(desc, "(Precise Event)")) {
if (json_streq(map, precise, "2"))
addfield(map, &extra_desc, " ",
"(Must be precise)", NULL);
else
addfield(map, &extra_desc, " ",
"(Precise event)", NULL);
}
if (desc && extra_desc)
addfield(map, &desc, " ", extra_desc, NULL);
if (long_desc && extra_desc)
addfield(map, &long_desc, " ", extra_desc, NULL);
if (msr != NULL)
addfield(map, &event, ",", msr->pname, msrval);
fixname(name);
err = func(data, name, real_event(name, event), desc, long_desc);
free(event);
free(desc);
free(name);
free(long_desc);
free(extra_desc);
if (err)
break;
tok += j;
}
EXPECT(tok - tokens == len, tok, "unexpected objects at end");
err = 0;
out_free:
free_json(map, size, tokens);
return err;
}
static char *file_name_to_table_name(char *fname)
{
unsigned int i;
int n;
int c;
char *tblname;
/*
* Ensure tablename starts with alphabetic character.
* Derive rest of table name from basename of the JSON file,
* replacing hyphens and stripping out .json suffix.
*/
n = asprintf(&tblname, "pme_%s", basename(fname));
if (n < 0) {
pr_info("%s: asprintf() error %s for file %s\n", prog,
strerror(errno), fname);
return NULL;
}
for (i = 0; i < strlen(tblname); i++) {
c = tblname[i];
if (c == '-')
tblname[i] = '_';
else if (c == '.') {
tblname[i] = '\0';
break;
} else if (!isalnum(c) && c != '_') {
pr_err("%s: Invalid character '%c' in file name %s\n",
prog, c, basename(fname));
free(tblname);
tblname = NULL;
break;
}
}
return tblname;
}
static void print_mapping_table_prefix(FILE *outfp)
{
fprintf(outfp, "struct pmu_events_map pmu_events_map[] = {\n");
}
static void print_mapping_table_suffix(FILE *outfp)
{
/*
* Print the terminating, NULL entry.
*/
fprintf(outfp, "{\n");
fprintf(outfp, "\t.cpuid = 0,\n");
fprintf(outfp, "\t.version = 0,\n");
fprintf(outfp, "\t.type = 0,\n");
fprintf(outfp, "\t.table = 0,\n");
fprintf(outfp, "},\n");
/* and finally, the closing curly bracket for the struct */
fprintf(outfp, "};\n");
}
static int process_mapfile(FILE *outfp, char *fpath)
{
int n = 16384;
FILE *mapfp;
char *save = NULL;
char *line, *p;
int line_num;
char *tblname;
pr_info("%s: Processing mapfile %s\n", prog, fpath);
line = malloc(n);
if (!line)
return -1;
mapfp = fopen(fpath, "r");
if (!mapfp) {
pr_info("%s: Error %s opening %s\n", prog, strerror(errno),
fpath);
return -1;
}
print_mapping_table_prefix(outfp);
/* Skip first line (header) */
p = fgets(line, n, mapfp);
if (!p)
goto out;
line_num = 1;
while (1) {
char *cpuid, *version, *type, *fname;
line_num++;
p = fgets(line, n, mapfp);
if (!p)
break;
if (line[0] == '#' || line[0] == '\n')
continue;
if (line[strlen(line)-1] != '\n') {
/* TODO Deal with lines longer than 16K */
pr_info("%s: Mapfile %s: line %d too long, aborting\n",
prog, fpath, line_num);
return -1;
}
line[strlen(line)-1] = '\0';
cpuid = strtok_r(p, ",", &save);
version = strtok_r(NULL, ",", &save);
fname = strtok_r(NULL, ",", &save);
type = strtok_r(NULL, ",", &save);
tblname = file_name_to_table_name(fname);
fprintf(outfp, "{\n");
fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid);
fprintf(outfp, "\t.version = \"%s\",\n", version);
fprintf(outfp, "\t.type = \"%s\",\n", type);
/*
* CHECK: We can't use the type (eg "core") field in the
* table name. For us to do that, we need to somehow tweak
* the other caller of file_name_to_table(), process_json()
* to determine the type. process_json() file has no way
* of knowing these are "core" events unless file name has
* core in it. If filename has core in it, we can safely
* ignore the type field here also.
*/
fprintf(outfp, "\t.table = %s\n", tblname);
fprintf(outfp, "},\n");
}
out:
print_mapping_table_suffix(outfp);
return 0;
}
/*
* If we fail to locate/process JSON and map files, create a NULL mapping
* table. This would at least allow perf to build even if we can't find/use
* the aliases.
*/
static void create_empty_mapping(const char *output_file)
{
FILE *outfp;
pr_info("%s: Creating empty pmu_events_map[] table\n", prog);
/* Truncate file to clear any partial writes to it */
outfp = fopen(output_file, "w");
if (!outfp) {
perror("fopen()");
_Exit(1);
}
fprintf(outfp, "#include \"../../pmu-events/pmu-events.h\"\n");
print_mapping_table_prefix(outfp);
print_mapping_table_suffix(outfp);
fclose(outfp);
}
static int get_maxfds(void)
{
struct rlimit rlim;
if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
return min((int)rlim.rlim_max / 2, 512);
return 512;
}
/*
* nftw() doesn't let us pass an argument to the processing function,
* so use a global variables.
*/
static FILE *eventsfp;
static char *mapfile;
static int process_one_file(const char *fpath, const struct stat *sb,
int typeflag, struct FTW *ftwbuf)
{
char *tblname, *bname = (char *) fpath + ftwbuf->base;
int is_dir = typeflag == FTW_D;
int is_file = typeflag == FTW_F;
int level = ftwbuf->level;
int err = 0;
pr_debug("%s %d %7jd %-20s %s\n",
is_file ? "f" : is_dir ? "d" : "x",
level, sb->st_size, bname, fpath);
/* base dir */
if (level == 0)
return 0;
/* model directory, reset topic */
if (level == 1 && is_dir) {
if (close_table)
print_events_table_suffix(eventsfp);
/*
* Drop file name suffix. Replace hyphens with underscores.
* Fail if file name contains any alphanum characters besides
* underscores.
*/
tblname = file_name_to_table_name(bname);
if (!tblname) {
pr_info("%s: Error determining table name for %s\n", prog,
bname);
return -1;
}
print_events_table_prefix(eventsfp, tblname);
return 0;
}
/*
* Save the mapfile name for now. We will process mapfile
* after processing all JSON files (so we can write out the
* mapping table after all PMU events tables).
*
* TODO: Allow for multiple mapfiles? Punt for now.
*/
if (level == 1 && is_file) {
if (!strncmp(bname, "mapfile.csv", 11)) {
if (mapfile) {
pr_info("%s: Many mapfiles? Using %s, ignoring %s\n",
prog, mapfile, fpath);
} else {
mapfile = strdup(fpath);
}
return 0;
}
pr_info("%s: Ignoring file %s\n", prog, fpath);
return 0;
}
/*
* If the file name does not have a .json extension,
* ignore it. It could be a readme.txt for instance.
*/
if (is_file) {
char *suffix = bname + strlen(bname) - 5;
if (strncmp(suffix, ".json", 5)) {
pr_info("%s: Ignoring file without .json suffix %s\n", prog,
fpath);
return 0;
}
}
if (level > 1 && add_topic(level, bname))
return -ENOMEM;
/*
* Assume all other files are JSON files.
*
* If mapfile refers to 'power7_core.json', we create a table
* named 'power7_core'. Any inconsistencies between the mapfile
* and directory tree could result in build failure due to table
* names not being found.
*
* Atleast for now, be strict with processing JSON file names.
* i.e. if JSON file name cannot be mapped to C-style table name,
* fail.
*/
if (is_file) {
struct perf_entry_data data = {
.topic = get_topic(),
.outfp = eventsfp,
};
err = json_events(fpath, print_events_table_entry, &data);
free(data.topic);
}
return err;
}
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
/*
* Starting in directory 'start_dirname', find the "mapfile.csv" and
* the set of JSON files for the architecture 'arch'.
*
* From each JSON file, create a C-style "PMU events table" from the
* JSON file (see struct pmu_event).
*
* From the mapfile, create a mapping between the CPU revisions and
* PMU event tables (see struct pmu_events_map).
*
* Write out the PMU events tables and the mapping table to pmu-event.c.
*
* If unable to process the JSON or arch files, create an empty mapping
* table so we can continue to build/use perf even if we cannot use the
* PMU event aliases.
*/
int main(int argc, char *argv[])
{
int rc;
int maxfds;
char ldirname[PATH_MAX];
const char *arch;
const char *output_file;
const char *start_dirname;
prog = basename(argv[0]);
if (argc < 4) {
pr_err("Usage: %s <arch> <starting_dir> <output_file>\n", prog);
return 1;
}
arch = argv[1];
start_dirname = argv[2];
output_file = argv[3];
if (argc > 4)
verbose = atoi(argv[4]);
eventsfp = fopen(output_file, "w");
if (!eventsfp) {
pr_err("%s Unable to create required file %s (%s)\n",
prog, output_file, strerror(errno));
return 2;
}
/* Include pmu-events.h first */
fprintf(eventsfp, "#include \"../../pmu-events/pmu-events.h\"\n");
sprintf(ldirname, "%s/%s", start_dirname, arch);
/*
* The mapfile allows multiple CPUids to point to the same JSON file,
* so, not sure if there is a need for symlinks within the pmu-events
* directory.
*
* For now, treat symlinks of JSON files as regular files and create
* separate tables for each symlink (presumably, each symlink refers
* to specific version of the CPU).
*/
maxfds = get_maxfds();
mapfile = NULL;
rc = nftw(ldirname, process_one_file, maxfds, 0);
if (rc && verbose) {
pr_info("%s: Error walking file tree %s\n", prog, ldirname);
goto empty_map;
} else if (rc) {
goto empty_map;
}
if (close_table)
print_events_table_suffix(eventsfp);
if (!mapfile) {
pr_info("%s: No CPU->JSON mapping?\n", prog);
goto empty_map;
}
if (process_mapfile(eventsfp, mapfile)) {
pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
goto empty_map;
}
return 0;
empty_map:
fclose(eventsfp);
create_empty_mapping(output_file);
return 0;
}

18
tools/perf/pmu-events/jevents.h Normal file
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@ -0,0 +1,18 @@
#ifndef JEVENTS_H
#define JEVENTS_H 1
int json_events(const char *fn,
int (*func)(void *data, char *name, char *event, char *desc,
char *long_desc),
void *data);
char *get_cpu_str(void);
#ifndef min
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
#endif
#endif

313
tools/perf/pmu-events/jsmn.c Normal file
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@ -0,0 +1,313 @@
/*
* Copyright (c) 2010 Serge A. Zaitsev
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Slightly modified by AK to not assume 0 terminated input.
*/
#include <stdlib.h>
#include "jsmn.h"
/*
* Allocates a fresh unused token from the token pool.
*/
static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,
jsmntok_t *tokens, size_t num_tokens)
{
jsmntok_t *tok;
if ((unsigned)parser->toknext >= num_tokens)
return NULL;
tok = &tokens[parser->toknext++];
tok->start = tok->end = -1;
tok->size = 0;
return tok;
}
/*
* Fills token type and boundaries.
*/
static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
int start, int end)
{
token->type = type;
token->start = start;
token->end = end;
token->size = 0;
}
/*
* Fills next available token with JSON primitive.
*/
static jsmnerr_t jsmn_parse_primitive(jsmn_parser *parser, const char *js,
size_t len,
jsmntok_t *tokens, size_t num_tokens)
{
jsmntok_t *token;
int start;
start = parser->pos;
for (; parser->pos < len; parser->pos++) {
switch (js[parser->pos]) {
#ifndef JSMN_STRICT
/*
* In strict mode primitive must be followed by ","
* or "}" or "]"
*/
case ':':
#endif
case '\t':
case '\r':
case '\n':
case ' ':
case ',':
case ']':
case '}':
goto found;
default:
break;
}
if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
parser->pos = start;
return JSMN_ERROR_INVAL;
}
}
#ifdef JSMN_STRICT
/*
* In strict mode primitive must be followed by a
* comma/object/array.
*/
parser->pos = start;
return JSMN_ERROR_PART;
#endif
found:
token = jsmn_alloc_token(parser, tokens, num_tokens);
if (token == NULL) {
parser->pos = start;
return JSMN_ERROR_NOMEM;
}
jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
parser->pos--; /* parent sees closing brackets */
return JSMN_SUCCESS;
}
/*
* Fills next token with JSON string.
*/
static jsmnerr_t jsmn_parse_string(jsmn_parser *parser, const char *js,
size_t len,
jsmntok_t *tokens, size_t num_tokens)
{
jsmntok_t *token;
int start = parser->pos;
/* Skip starting quote */
parser->pos++;
for (; parser->pos < len; parser->pos++) {
char c = js[parser->pos];
/* Quote: end of string */
if (c == '\"') {
token = jsmn_alloc_token(parser, tokens, num_tokens);
if (token == NULL) {
parser->pos = start;
return JSMN_ERROR_NOMEM;
}
jsmn_fill_token(token, JSMN_STRING, start+1,
parser->pos);
return JSMN_SUCCESS;
}
/* Backslash: Quoted symbol expected */
if (c == '\\') {
parser->pos++;
switch (js[parser->pos]) {
/* Allowed escaped symbols */
case '\"':
case '/':
case '\\':
case 'b':
case 'f':
case 'r':
case 'n':
case 't':
break;
/* Allows escaped symbol \uXXXX */
case 'u':
/* TODO */
break;
/* Unexpected symbol */
default:
parser->pos = start;
return JSMN_ERROR_INVAL;
}
}
}
parser->pos = start;
return JSMN_ERROR_PART;
}
/*
* Parse JSON string and fill tokens.
*/
jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
jsmntok_t *tokens, unsigned int num_tokens)
{
jsmnerr_t r;
int i;
jsmntok_t *token;
for (; parser->pos < len; parser->pos++) {
char c;
jsmntype_t type;
c = js[parser->pos];
switch (c) {
case '{':
case '[':
token = jsmn_alloc_token(parser, tokens, num_tokens);
if (token == NULL)
return JSMN_ERROR_NOMEM;
if (parser->toksuper != -1)
tokens[parser->toksuper].size++;
token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
token->start = parser->pos;
parser->toksuper = parser->toknext - 1;
break;
case '}':
case ']':
type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
for (i = parser->toknext - 1; i >= 0; i--) {
token = &tokens[i];
if (token->start != -1 && token->end == -1) {
if (token->type != type)
return JSMN_ERROR_INVAL;
parser->toksuper = -1;
token->end = parser->pos + 1;
break;
}
}
/* Error if unmatched closing bracket */
if (i == -1)
return JSMN_ERROR_INVAL;
for (; i >= 0; i--) {
token = &tokens[i];
if (token->start != -1 && token->end == -1) {
parser->toksuper = i;
break;
}
}
break;
case '\"':
r = jsmn_parse_string(parser, js, len, tokens,
num_tokens);
if (r < 0)
return r;
if (parser->toksuper != -1)
tokens[parser->toksuper].size++;
break;
case '\t':
case '\r':
case '\n':
case ':':
case ',':
case ' ':
break;
#ifdef JSMN_STRICT
/*
* In strict mode primitives are:
* numbers and booleans.
*/
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case 't':
case 'f':
case 'n':
#else
/*
* In non-strict mode every unquoted value
* is a primitive.
*/
/*FALL THROUGH */
default:
#endif
r = jsmn_parse_primitive(parser, js, len, tokens,
num_tokens);
if (r < 0)
return r;
if (parser->toksuper != -1)
tokens[parser->toksuper].size++;
break;
#ifdef JSMN_STRICT
/* Unexpected char in strict mode */
default:
return JSMN_ERROR_INVAL;
#endif
}
}
for (i = parser->toknext - 1; i >= 0; i--) {
/* Unmatched opened object or array */
if (tokens[i].start != -1 && tokens[i].end == -1)
return JSMN_ERROR_PART;
}
return JSMN_SUCCESS;
}
/*
* Creates a new parser based over a given buffer with an array of tokens
* available.
*/
void jsmn_init(jsmn_parser *parser)
{
parser->pos = 0;
parser->toknext = 0;
parser->toksuper = -1;
}
const char *jsmn_strerror(jsmnerr_t err)
{
switch (err) {
case JSMN_ERROR_NOMEM:
return "No enough tokens";
case JSMN_ERROR_INVAL:
return "Invalid character inside JSON string";
case JSMN_ERROR_PART:
return "The string is not a full JSON packet, more bytes expected";
case JSMN_SUCCESS:
return "Success";
default:
return "Unknown json error";
}
}

67
tools/perf/pmu-events/jsmn.h Normal file
View file

@ -0,0 +1,67 @@
#ifndef __JSMN_H_
#define __JSMN_H_
/*
* JSON type identifier. Basic types are:
* o Object
* o Array
* o String
* o Other primitive: number, boolean (true/false) or null
*/
typedef enum {
JSMN_PRIMITIVE = 0,
JSMN_OBJECT = 1,
JSMN_ARRAY = 2,
JSMN_STRING = 3
} jsmntype_t;
typedef enum {
/* Not enough tokens were provided */
JSMN_ERROR_NOMEM = -1,
/* Invalid character inside JSON string */
JSMN_ERROR_INVAL = -2,
/* The string is not a full JSON packet, more bytes expected */
JSMN_ERROR_PART = -3,
/* Everything was fine */
JSMN_SUCCESS = 0
} jsmnerr_t;
/*
* JSON token description.
* @param type type (object, array, string etc.)
* @param start start position in JSON data string
* @param end end position in JSON data string
*/
typedef struct {
jsmntype_t type;
int start;
int end;
int size;
} jsmntok_t;
/*
* JSON parser. Contains an array of token blocks available. Also stores
* the string being parsed now and current position in that string
*/
typedef struct {
unsigned int pos; /* offset in the JSON string */
int toknext; /* next token to allocate */
int toksuper; /* superior token node, e.g parent object or array */
} jsmn_parser;
/*
* Create JSON parser over an array of tokens
*/
void jsmn_init(jsmn_parser *parser);
/*
* Run JSON parser. It parses a JSON data string into and array of tokens,
* each describing a single JSON object.
*/
jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js,
size_t len,
jsmntok_t *tokens, unsigned int num_tokens);
const char *jsmn_strerror(jsmnerr_t err);
#endif /* __JSMN_H_ */

162
tools/perf/pmu-events/json.c Normal file
View file

@ -0,0 +1,162 @@
/* Parse JSON files using the JSMN parser. */
/*
* Copyright (c) 2014, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include "jsmn.h"
#include "json.h"
#include <linux/kernel.h>
static char *mapfile(const char *fn, size_t *size)
{
unsigned ps = sysconf(_SC_PAGESIZE);
struct stat st;
char *map = NULL;
int err;
int fd = open(fn, O_RDONLY);
if (fd < 0 && verbose && fn) {
pr_err("Error opening events file '%s': %s\n", fn,
strerror(errno));
}
if (fd < 0)
return NULL;
err = fstat(fd, &st);
if (err < 0)
goto out;
*size = st.st_size;
map = mmap(NULL,
(st.st_size + ps - 1) & ~(ps - 1),
PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
if (map == MAP_FAILED)
map = NULL;
out:
close(fd);
return map;
}
static void unmapfile(char *map, size_t size)
{
unsigned ps = sysconf(_SC_PAGESIZE);
munmap(map, roundup(size, ps));
}
/*
* Parse json file using jsmn. Return array of tokens,
* and mapped file. Caller needs to free array.
*/
jsmntok_t *parse_json(const char *fn, char **map, size_t *size, int *len)
{
jsmn_parser parser;
jsmntok_t *tokens;
jsmnerr_t res;
unsigned sz;
*map = mapfile(fn, size);
if (!*map)
return NULL;
/* Heuristic */
sz = *size * 16;
tokens = malloc(sz);
if (!tokens)
goto error;
jsmn_init(&parser);
res = jsmn_parse(&parser, *map, *size, tokens,
sz / sizeof(jsmntok_t));
if (res != JSMN_SUCCESS) {
pr_err("%s: json error %s\n", fn, jsmn_strerror(res));
goto error_free;
}
if (len)
*len = parser.toknext;
return tokens;
error_free:
free(tokens);
error:
unmapfile(*map, *size);
return NULL;
}
void free_json(char *map, size_t size, jsmntok_t *tokens)
{
free(tokens);
unmapfile(map, size);
}
static int countchar(char *map, char c, int end)
{
int i;
int count = 0;
for (i = 0; i < end; i++)
if (map[i] == c)
count++;
return count;
}
/* Return line number of a jsmn token */
int json_line(char *map, jsmntok_t *t)
{
return countchar(map, '\n', t->start) + 1;
}
static const char * const jsmn_types[] = {
[JSMN_PRIMITIVE] = "primitive",
[JSMN_ARRAY] = "array",
[JSMN_OBJECT] = "object",
[JSMN_STRING] = "string"
};
#define LOOKUP(a, i) ((i) < (sizeof(a)/sizeof(*(a))) ? ((a)[i]) : "?")
/* Return type name of a jsmn token */
const char *json_name(jsmntok_t *t)
{
return LOOKUP(jsmn_types, t->type);
}
int json_len(jsmntok_t *t)
{
return t->end - t->start;
}
/* Is string t equal to s? */
int json_streq(char *map, jsmntok_t *t, const char *s)
{
unsigned len = json_len(t);
return len == strlen(s) && !strncasecmp(map + t->start, s, len);
}

38
tools/perf/pmu-events/json.h Normal file
View file

@ -0,0 +1,38 @@
#ifndef JSON_H
#define JSON_H 1
#include "jsmn.h"
jsmntok_t *parse_json(const char *fn, char **map, size_t *size, int *len);
void free_json(char *map, size_t size, jsmntok_t *tokens);
int json_line(char *map, jsmntok_t *t);
const char *json_name(jsmntok_t *t);
int json_streq(char *map, jsmntok_t *t, const char *s);
int json_len(jsmntok_t *t);
extern int verbose;
#include <stdbool.h>
extern int eprintf(int level, int var, const char *fmt, ...);
#define pr_fmt(fmt) fmt
#define pr_err(fmt, ...) \
eprintf(0, verbose, pr_fmt(fmt), ##__VA_ARGS__)
#define pr_info(fmt, ...) \
eprintf(1, verbose, pr_fmt(fmt), ##__VA_ARGS__)
#define pr_debug(fmt, ...) \
eprintf(2, verbose, pr_fmt(fmt), ##__VA_ARGS__)
#ifndef roundup
#define roundup(x, y) ( \
{ \
const typeof(y) __y = y; \
(((x) + (__y - 1)) / __y) * __y; \
} \
)
#endif
#endif

37
tools/perf/pmu-events/pmu-events.h Normal file
View file

@ -0,0 +1,37 @@
#ifndef PMU_EVENTS_H
#define PMU_EVENTS_H
/*
* Describe each PMU event. Each CPU has a table of PMU events.
*/
struct pmu_event {
const char *name;
const char *event;
const char *desc;
const char *topic;
const char *long_desc;
};
/*
*
* Map a CPU to its table of PMU events. The CPU is identified by the
* cpuid field, which is an arch-specific identifier for the CPU.
* The identifier specified in tools/perf/pmu-events/arch/xxx/mapfile
* must match the get_cpustr() in tools/perf/arch/xxx/util/header.c)
*
* The cpuid can contain any character other than the comma.
*/
struct pmu_events_map {
const char *cpuid;
const char *version;
const char *type; /* core, uncore etc */
struct pmu_event *table;
};
/*
* Global table mapping each known CPU for the architecture to its
* table of PMU events.
*/
extern struct pmu_events_map pmu_events_map[];
#endif

12
tools/perf/util/evlist.c
View file

@ -384,15 +384,14 @@ void perf_evlist__toggle_enable(struct perf_evlist *evlist)
static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist,
struct perf_evsel *evsel, int cpu)
{
int thread, err;
int thread;
int nr_threads = perf_evlist__nr_threads(evlist, evsel);
if (!evsel->fd)
return -EINVAL;
for (thread = 0; thread < nr_threads; thread++) {
err = ioctl(FD(evsel, cpu, thread),
PERF_EVENT_IOC_ENABLE, 0);
int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
if (err)
return err;
}
@ -403,14 +402,14 @@ static int perf_evlist__enable_event_thread(struct perf_evlist *evlist,
struct perf_evsel *evsel,
int thread)
{
int cpu, err;
int cpu;
int nr_cpus = cpu_map__nr(evlist->cpus);
if (!evsel->fd)
return -EINVAL;
for (cpu = 0; cpu < nr_cpus; cpu++) {
err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
int err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0);
if (err)
return err;
}
@ -1606,10 +1605,9 @@ void perf_evlist__close(struct perf_evlist *evlist)
struct perf_evsel *evsel;
int ncpus = cpu_map__nr(evlist->cpus);
int nthreads = thread_map__nr(evlist->threads);
int n;
evlist__for_each_entry_reverse(evlist, evsel) {
n = evsel->cpus ? evsel->cpus->nr : ncpus;
int n = evsel->cpus ? evsel->cpus->nr : ncpus;
perf_evsel__close(evsel, n, nthreads);
}
}

3
tools/perf/util/evsel.c
View file

@ -985,14 +985,13 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
{
int cpu, thread;
if (evsel->system_wide)
nthreads = 1;
evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
if (evsel->fd) {
int cpu, thread;
for (cpu = 0; cpu < ncpus; cpu++) {
for (thread = 0; thread < nthreads; thread++) {
FD(evsel, cpu, thread) = -1;

1
tools/perf/util/header.h
View file

@ -151,4 +151,5 @@ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned);
*/
int get_cpuid(char *buffer, size_t sz);
char *get_cpuid_str(void);
#endif /* __PERF_HEADER_H */

6
tools/perf/util/machine.c
View file

@ -1745,9 +1745,8 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
int max_stack)
{
struct ip_callchain *chain = sample->callchain;
int chain_nr = min(max_stack, (int)chain->nr);
int chain_nr = min(max_stack, (int)chain->nr), i;
u8 cpumode = PERF_RECORD_MISC_USER;
int i, j, err;
u64 ip;
for (i = 0; i < chain_nr; i++) {
@ -1758,7 +1757,7 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
/* LBR only affects the user callchain */
if (i != chain_nr) {
struct branch_stack *lbr_stack = sample->branch_stack;
int lbr_nr = lbr_stack->nr;
int lbr_nr = lbr_stack->nr, j;
/*
* LBR callstack can only get user call chain.
* The mix_chain_nr is kernel call chain
@ -1772,6 +1771,7 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
int mix_chain_nr = i + 1 + lbr_nr + 1;
for (j = 0; j < mix_chain_nr; j++) {
int err;
if (callchain_param.order == ORDER_CALLEE) {
if (j < i + 1)
ip = chain->ips[j];

8
tools/perf/util/parse-events.c
View file

@ -924,6 +924,7 @@ config_term_avail(int term_type, struct parse_events_error *err)
case PARSE_EVENTS__TERM_TYPE_CONFIG1:
case PARSE_EVENTS__TERM_TYPE_CONFIG2:
case PARSE_EVENTS__TERM_TYPE_NAME:
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
return true;
default:
if (!err)
@ -1458,7 +1459,7 @@ comp_pmu(const void *p1, const void *p2)
struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
return strcmp(pmu1->symbol, pmu2->symbol);
return strcasecmp(pmu1->symbol, pmu2->symbol);
}
static void perf_pmu__parse_cleanup(void)
@ -2263,7 +2264,8 @@ out_enomem:
/*
* Print the help text for the event symbols:
*/
void print_events(const char *event_glob, bool name_only)
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc)
{
print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
@ -2273,7 +2275,7 @@ void print_events(const char *event_glob, bool name_only)
print_hwcache_events(event_glob, name_only);
print_pmu_events(event_glob, name_only);
print_pmu_events(event_glob, name_only, quiet_flag, long_desc);
if (event_glob != NULL)
return;

3
tools/perf/util/parse-events.h
View file

@ -172,7 +172,8 @@ void parse_events_update_lists(struct list_head *list_event,
void parse_events_evlist_error(struct parse_events_evlist *data,
int idx, const char *str);
void print_events(const char *event_glob, bool name_only);
void print_events(const char *event_glob, bool name_only, bool quiet,
bool long_desc);
struct event_symbol {
const char *symbol;

176
tools/perf/util/pmu.c
View file

@ -12,6 +12,9 @@
#include "pmu.h"
#include "parse-events.h"
#include "cpumap.h"
#include "header.h"
#include "pmu-events/pmu-events.h"
#include "cache.h"
struct perf_pmu_format {
char *name;
@ -220,7 +223,8 @@ static int perf_pmu__parse_snapshot(struct perf_pmu_alias *alias,
}
static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
char *desc __maybe_unused, char *val)
char *desc, char *val, char *long_desc,
char *topic)
{
struct perf_pmu_alias *alias;
int ret;
@ -253,6 +257,11 @@ static int __perf_pmu__new_alias(struct list_head *list, char *dir, char *name,
perf_pmu__parse_snapshot(alias, dir, name);
}
alias->desc = desc ? strdup(desc) : NULL;
alias->long_desc = long_desc ? strdup(long_desc) :
desc ? strdup(desc) : NULL;
alias->topic = topic ? strdup(topic) : NULL;
list_add_tail(&alias->list, list);
return 0;
@ -269,7 +278,7 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI
buf[ret] = 0;
return __perf_pmu__new_alias(list, dir, name, NULL, buf);
return __perf_pmu__new_alias(list, dir, name, NULL, buf, NULL, NULL);
}
static inline bool pmu_alias_info_file(char *name)
@ -473,6 +482,68 @@ static struct cpu_map *pmu_cpumask(const char *name)
return cpus;
}
/*
* Return the CPU id as a raw string.
*
* Each architecture should provide a more precise id string that
* can be use to match the architecture's "mapfile".
*/
char * __weak get_cpuid_str(void)
{
return NULL;
}
/*
* From the pmu_events_map, find the table of PMU events that corresponds
* to the current running CPU. Then, add all PMU events from that table
* as aliases.
*/
static void pmu_add_cpu_aliases(struct list_head *head)
{
int i;
struct pmu_events_map *map;
struct pmu_event *pe;
char *cpuid;
cpuid = getenv("PERF_CPUID");
if (cpuid)
cpuid = strdup(cpuid);
if (!cpuid)
cpuid = get_cpuid_str();
if (!cpuid)
return;
pr_debug("Using CPUID %s\n", cpuid);
i = 0;
while (1) {
map = &pmu_events_map[i++];
if (!map->table)
goto out;
if (!strcmp(map->cpuid, cpuid))
break;
}
/*
* Found a matching PMU events table. Create aliases
*/
i = 0;
while (1) {
pe = &map->table[i++];
if (!pe->name)
break;
/* need type casts to override 'const' */
__perf_pmu__new_alias(head, NULL, (char *)pe->name,
(char *)pe->desc, (char *)pe->event,
(char *)pe->long_desc, (char *)pe->topic);
}
out:
free(cpuid);
}
struct perf_event_attr * __weak
perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
{
@ -497,6 +568,9 @@ static struct perf_pmu *pmu_lookup(const char *name)
if (pmu_aliases(name, &aliases))
return NULL;
if (!strcmp(name, "cpu"))
pmu_add_cpu_aliases(&aliases);
if (pmu_type(name, &type))
return NULL;
@ -983,21 +1057,63 @@ static char *format_alias_or(char *buf, int len, struct perf_pmu *pmu,
return buf;
}
static int cmp_string(const void *a, const void *b)
struct sevent {
char *name;
char *desc;
char *topic;
};
static int cmp_sevent(const void *a, const void *b)
{
const char * const *as = a;
const char * const *bs = b;
return strcmp(*as, *bs);
const struct sevent *as = a;
const struct sevent *bs = b;
/* Put extra events last */
if (!!as->desc != !!bs->desc)
return !!as->desc - !!bs->desc;
if (as->topic && bs->topic) {
int n = strcmp(as->topic, bs->topic);
if (n)
return n;
}
return strcmp(as->name, bs->name);
}
void print_pmu_events(const char *event_glob, bool name_only)
static void wordwrap(char *s, int start, int max, int corr)
{
int column = start;
int n;
while (*s) {
int wlen = strcspn(s, " \t");
if (column + wlen >= max && column > start) {
printf("\n%*s", start, "");
column = start + corr;
}
n = printf("%s%.*s", column > start ? " " : "", wlen, s);
if (n <= 0)
break;
s += wlen;
column += n;
while (isspace(*s))
s++;
}
}
void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc)
{
struct perf_pmu *pmu;
struct perf_pmu_alias *alias;
char buf[1024];
int printed = 0;
int len, j;
char **aliases;
struct sevent *aliases;
int numdesc = 0;
int columns = pager_get_columns();
char *topic = NULL;
pmu = NULL;
len = 0;
@ -1007,14 +1123,15 @@ void print_pmu_events(const char *event_glob, bool name_only)
if (pmu->selectable)
len++;
}
aliases = zalloc(sizeof(char *) * len);
aliases = zalloc(sizeof(struct sevent) * len);
if (!aliases)
goto out_enomem;
pmu = NULL;
j = 0;
while ((pmu = perf_pmu__scan(pmu)) != NULL) {
list_for_each_entry(alias, &pmu->aliases, list) {
char *name = format_alias(buf, sizeof(buf), pmu, alias);
char *name = alias->desc ? alias->name :
format_alias(buf, sizeof(buf), pmu, alias);
bool is_cpu = !strcmp(pmu->name, "cpu");
if (event_glob != NULL &&
@ -1023,12 +1140,21 @@ void print_pmu_events(const char *event_glob, bool name_only)
event_glob))))
continue;
if (is_cpu && !name_only)
if (is_cpu && !name_only && !alias->desc)
name = format_alias_or(buf, sizeof(buf), pmu, alias);
aliases[j] = strdup(name);
if (aliases[j] == NULL)
aliases[j].name = name;
if (is_cpu && !name_only && !alias->desc)
aliases[j].name = format_alias_or(buf,
sizeof(buf),
pmu, alias);
aliases[j].name = strdup(aliases[j].name);
if (!aliases[j].name)
goto out_enomem;
aliases[j].desc = long_desc ? alias->long_desc :
alias->desc;
aliases[j].topic = alias->topic;
j++;
}
if (pmu->selectable &&
@ -1036,25 +1162,39 @@ void print_pmu_events(const char *event_glob, bool name_only)
char *s;
if (asprintf(&s, "%s//", pmu->name) < 0)
goto out_enomem;
aliases[j] = s;
aliases[j].name = s;
j++;
}
}
len = j;
qsort(aliases, len, sizeof(char *), cmp_string);
qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
for (j = 0; j < len; j++) {
if (name_only) {
printf("%s ", aliases[j]);
printf("%s ", aliases[j].name);
continue;
}
printf(" %-50s [Kernel PMU event]\n", aliases[j]);
if (aliases[j].desc && !quiet_flag) {
if (numdesc++ == 0)
printf("\n");
if (aliases[j].topic && (!topic ||
strcmp(topic, aliases[j].topic))) {
printf("%s%s:\n", topic ? "\n" : "",
aliases[j].topic);
topic = aliases[j].topic;
}
printf(" %-50s\n", aliases[j].name);
printf("%*s", 8, "[");
wordwrap(aliases[j].desc, 8, columns, 0);
printf("]\n");
} else
printf(" %-50s [Kernel PMU event]\n", aliases[j].name);
printed++;
}
if (printed && pager_in_use())
printf("\n");
out_free:
for (j = 0; j < len; j++)
zfree(&aliases[j]);
zfree(&aliases[j].name);
zfree(&aliases);
return;

6
tools/perf/util/pmu.h
View file

@ -40,6 +40,9 @@ struct perf_pmu_info {
struct perf_pmu_alias {
char *name;
char *desc;
char *long_desc;
char *topic;
struct list_head terms; /* HEAD struct parse_events_term -> list */
struct list_head list; /* ELEM */
char unit[UNIT_MAX_LEN+1];
@ -71,7 +74,8 @@ int perf_pmu__format_parse(char *dir, struct list_head *head);
struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);
void print_pmu_events(const char *event_glob, bool name_only);
void print_pmu_events(const char *event_glob, bool name_only, bool quiet,
bool long_desc);
bool pmu_have_event(const char *pname, const char *name);
int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,

2
tools/perf/util/probe-event.c
View file

@ -213,7 +213,7 @@ static int convert_exec_to_group(const char *exec, char **result)
goto out;
}
for (ptr2 = ptr1; ptr2 != '\0'; ptr2++) {
for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) {
if (!isalnum(*ptr2) && *ptr2 != '_') {
*ptr2 = '\0';
break;

3
tools/perf/util/strbuf.h
View file

@ -66,9 +66,8 @@ static inline ssize_t strbuf_avail(const struct strbuf *sb) {
int strbuf_grow(struct strbuf *buf, size_t);
static inline int strbuf_setlen(struct strbuf *sb, size_t len) {
int ret;
if (!sb->alloc) {
ret = strbuf_grow(sb, 0);
int ret = strbuf_grow(sb, 0);
if (ret)
return ret;
}

9
tools/perf/util/thread.c
View file

@ -14,13 +14,12 @@
int thread__init_map_groups(struct thread *thread, struct machine *machine)
{
struct thread *leader;
pid_t pid = thread->pid_;
if (pid == thread->tid || pid == -1) {
thread->mg = map_groups__new(machine);
} else {
leader = __machine__findnew_thread(machine, pid, pid);
struct thread *leader = __machine__findnew_thread(machine, pid, pid);
if (leader) {
thread->mg = map_groups__get(leader->mg);
thread__put(leader);
@ -130,11 +129,10 @@ int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp,
bool exec)
{
struct comm *new, *curr = thread__comm(thread);
int err;
/* Override the default :tid entry */
if (!thread->comm_set) {
err = comm__override(curr, str, timestamp, exec);
int err = comm__override(curr, str, timestamp, exec);
if (err)
return err;
} else {
@ -270,10 +268,9 @@ static int thread__clone_map_groups(struct thread *thread,
int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
{
int err;
if (parent->comm_set) {
const char *comm = thread__comm_str(parent);
int err;
if (!comm)
return -ENOMEM;
err = thread__set_comm(thread, comm, timestamp);