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tools lib traceevent: Add xen plugin

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Adding xen plugin.

This plugin adds fields resolving for following tracepoint events:

  xen:xen_mc_entry
  xen:xen_mc_extend_args

The diff of 'perf script' output generated by old and new code: (data
was generated by 'perf record -e 'xen:*' ls')

  --- script.xen.old
  +++ script.xen.new
  -         swapper     0 [002]   136.267492: xen:xen_mc_entry: [FAILED TO PARSE] op=3 nargs=2 args=ARRAY[18, 00, 00, 00, 00, 00, 00, 00, 00, e0, d4, 4b, 04, 88, ff, ff, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00]
  +         swapper     0 [002]   136.267492: xen:xen_mc_entry: op 3(stack_switch) args [18, 0, 0, 0, 0, 0]
  -            perf  1970 [008]   136.273319: xen:xen_mc_extend_args: [FAILED TO PARSE] op=1 args=16 res=1
  +            perf  1970 [008]   136.273319: xen:xen_mc_extend_args: extending op 1(mmu_update) by 16 bytes res ???

NOTE We still do not handle the 'sizeof' and fail to parse following xen
tracepoints:

  xen:xen_mmu_set_pte
  xen:xen_mmu_set_pte_atomic
  xen:xen_mmu_set_domain_pte
  xen:xen_mmu_set_pte_at
  xen:xen_mmu_set_pmd
  xen:xen_mmu_set_pud
  xen:xen_mmu_set_pgd
  xen:xen_mmu_ptep_modify_prot_start
  xen:xen_mmu_ptep_modify_prot_commit

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386076182-14484-20-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2013-12-03 14:09:33 +01:00 committed by Arnaldo Carvalho de Melo
parent 07a180a0bf
commit 40c03ad592
2 changed files with 131 additions and 0 deletions
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1
tools/lib/traceevent/Makefile
View file

@ -219,6 +219,7 @@ PLUGIN_OBJS += plugin_kvm.o
PLUGIN_OBJS += plugin_mac80211.o
PLUGIN_OBJS += plugin_sched_switch.o
PLUGIN_OBJS += plugin_function.o
PLUGIN_OBJS += plugin_xen.o
PLUGINS := $(PLUGIN_OBJS:.o=.so)

130
tools/lib/traceevent/plugin_xen.c Normal file
View file

@ -0,0 +1,130 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "event-parse.h"
#define __HYPERVISOR_set_trap_table 0
#define __HYPERVISOR_mmu_update 1
#define __HYPERVISOR_set_gdt 2
#define __HYPERVISOR_stack_switch 3
#define __HYPERVISOR_set_callbacks 4
#define __HYPERVISOR_fpu_taskswitch 5
#define __HYPERVISOR_sched_op_compat 6
#define __HYPERVISOR_dom0_op 7
#define __HYPERVISOR_set_debugreg 8
#define __HYPERVISOR_get_debugreg 9
#define __HYPERVISOR_update_descriptor 10
#define __HYPERVISOR_memory_op 12
#define __HYPERVISOR_multicall 13
#define __HYPERVISOR_update_va_mapping 14
#define __HYPERVISOR_set_timer_op 15
#define __HYPERVISOR_event_channel_op_compat 16
#define __HYPERVISOR_xen_version 17
#define __HYPERVISOR_console_io 18
#define __HYPERVISOR_physdev_op_compat 19
#define __HYPERVISOR_grant_table_op 20
#define __HYPERVISOR_vm_assist 21
#define __HYPERVISOR_update_va_mapping_otherdomain 22
#define __HYPERVISOR_iret 23 /* x86 only */
#define __HYPERVISOR_vcpu_op 24
#define __HYPERVISOR_set_segment_base 25 /* x86/64 only */
#define __HYPERVISOR_mmuext_op 26
#define __HYPERVISOR_acm_op 27
#define __HYPERVISOR_nmi_op 28
#define __HYPERVISOR_sched_op 29
#define __HYPERVISOR_callback_op 30
#define __HYPERVISOR_xenoprof_op 31
#define __HYPERVISOR_event_channel_op 32
#define __HYPERVISOR_physdev_op 33
#define __HYPERVISOR_hvm_op 34
#define __HYPERVISOR_tmem_op 38
/* Architecture-specific hypercall definitions. */
#define __HYPERVISOR_arch_0 48
#define __HYPERVISOR_arch_1 49
#define __HYPERVISOR_arch_2 50
#define __HYPERVISOR_arch_3 51
#define __HYPERVISOR_arch_4 52
#define __HYPERVISOR_arch_5 53
#define __HYPERVISOR_arch_6 54
#define __HYPERVISOR_arch_7 55
#define N(x) [__HYPERVISOR_##x] = "("#x")"
static const char *xen_hypercall_names[] = {
N(set_trap_table),
N(mmu_update),
N(set_gdt),
N(stack_switch),
N(set_callbacks),
N(fpu_taskswitch),
N(sched_op_compat),
N(dom0_op),
N(set_debugreg),
N(get_debugreg),
N(update_descriptor),
N(memory_op),
N(multicall),
N(update_va_mapping),
N(set_timer_op),
N(event_channel_op_compat),
N(xen_version),
N(console_io),
N(physdev_op_compat),
N(grant_table_op),
N(vm_assist),
N(update_va_mapping_otherdomain),
N(iret),
N(vcpu_op),
N(set_segment_base),
N(mmuext_op),
N(acm_op),
N(nmi_op),
N(sched_op),
N(callback_op),
N(xenoprof_op),
N(event_channel_op),
N(physdev_op),
N(hvm_op),
/* Architecture-specific hypercall definitions. */
N(arch_0),
N(arch_1),
N(arch_2),
N(arch_3),
N(arch_4),
N(arch_5),
N(arch_6),
N(arch_7),
};
#undef N
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
static const char *xen_hypercall_name(unsigned op)
{
if (op < ARRAY_SIZE(xen_hypercall_names) &&
xen_hypercall_names[op] != NULL)
return xen_hypercall_names[op];
return "";
}
unsigned long long process_xen_hypercall_name(struct trace_seq *s,
unsigned long long *args)
{
unsigned int op = args[0];
trace_seq_printf(s, "%s", xen_hypercall_name(op));
return 0;
}
int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
pevent_register_print_function(pevent,
process_xen_hypercall_name,
PEVENT_FUNC_ARG_STRING,
"xen_hypercall_name",
PEVENT_FUNC_ARG_INT,
PEVENT_FUNC_ARG_VOID);
return 0;
}