![Ingo Molnar](/assets/img/avatar_default.png)
Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian <eranian@google.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
246 lines
4.7 KiB
C
246 lines
4.7 KiB
C
#ifndef _TRACE_EVENTS_H
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#define _TRACE_EVENTS_H
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#include "parse-events.h"
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#define __unused __attribute__((unused))
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#ifndef PAGE_MASK
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#define PAGE_MASK (page_size - 1)
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#endif
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enum {
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RINGBUF_TYPE_PADDING = 29,
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RINGBUF_TYPE_TIME_EXTEND = 30,
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RINGBUF_TYPE_TIME_STAMP = 31,
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};
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#ifndef TS_SHIFT
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#define TS_SHIFT 27
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#endif
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#define NSECS_PER_SEC 1000000000ULL
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#define NSECS_PER_USEC 1000ULL
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enum format_flags {
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FIELD_IS_ARRAY = 1,
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FIELD_IS_POINTER = 2,
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};
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struct format_field {
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struct format_field *next;
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char *type;
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char *name;
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int offset;
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int size;
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unsigned long flags;
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};
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struct format {
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int nr_common;
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int nr_fields;
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struct format_field *common_fields;
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struct format_field *fields;
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};
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struct print_arg_atom {
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char *atom;
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};
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struct print_arg_string {
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char *string;
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int offset;
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};
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struct print_arg_field {
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char *name;
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struct format_field *field;
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};
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struct print_flag_sym {
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struct print_flag_sym *next;
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char *value;
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char *str;
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};
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struct print_arg_typecast {
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char *type;
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struct print_arg *item;
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};
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struct print_arg_flags {
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struct print_arg *field;
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char *delim;
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struct print_flag_sym *flags;
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};
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struct print_arg_symbol {
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struct print_arg *field;
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struct print_flag_sym *symbols;
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};
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struct print_arg;
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struct print_arg_op {
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char *op;
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int prio;
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struct print_arg *left;
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struct print_arg *right;
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};
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struct print_arg_func {
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char *name;
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struct print_arg *args;
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};
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enum print_arg_type {
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PRINT_NULL,
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PRINT_ATOM,
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PRINT_FIELD,
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PRINT_FLAGS,
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PRINT_SYMBOL,
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PRINT_TYPE,
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PRINT_STRING,
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PRINT_OP,
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};
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struct print_arg {
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struct print_arg *next;
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enum print_arg_type type;
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union {
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struct print_arg_atom atom;
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struct print_arg_field field;
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struct print_arg_typecast typecast;
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struct print_arg_flags flags;
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struct print_arg_symbol symbol;
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struct print_arg_func func;
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struct print_arg_string string;
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struct print_arg_op op;
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};
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};
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struct print_fmt {
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char *format;
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struct print_arg *args;
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};
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struct event {
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struct event *next;
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char *name;
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int id;
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int flags;
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struct format format;
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struct print_fmt print_fmt;
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};
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enum {
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EVENT_FL_ISFTRACE = 1,
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EVENT_FL_ISPRINT = 2,
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EVENT_FL_ISBPRINT = 4,
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EVENT_FL_ISFUNC = 8,
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EVENT_FL_ISFUNCENT = 16,
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EVENT_FL_ISFUNCRET = 32,
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};
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struct record {
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unsigned long long ts;
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int size;
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void *data;
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};
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struct record *trace_peek_data(int cpu);
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struct record *trace_read_data(int cpu);
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void parse_set_info(int nr_cpus, int long_sz);
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void trace_report(void);
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void *malloc_or_die(unsigned int size);
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void parse_cmdlines(char *file, int size);
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void parse_proc_kallsyms(char *file, unsigned int size);
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void parse_ftrace_printk(char *file, unsigned int size);
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void print_funcs(void);
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void print_printk(void);
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int parse_ftrace_file(char *buf, unsigned long size);
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int parse_event_file(char *buf, unsigned long size, char *system);
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void print_event(int cpu, void *data, int size, unsigned long long nsecs,
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char *comm);
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extern int file_bigendian;
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extern int host_bigendian;
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int bigendian(void);
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static inline unsigned short __data2host2(unsigned short data)
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{
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unsigned short swap;
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if (host_bigendian == file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 8) |
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((data & (0xffULL << 8)) >> 8);
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return swap;
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}
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static inline unsigned int __data2host4(unsigned int data)
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{
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unsigned int swap;
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if (host_bigendian == file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 24) |
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((data & (0xffULL << 8)) << 8) |
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((data & (0xffULL << 16)) >> 8) |
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((data & (0xffULL << 24)) >> 24);
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return swap;
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}
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static inline unsigned long long __data2host8(unsigned long long data)
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{
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unsigned long long swap;
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if (host_bigendian == file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 56) |
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((data & (0xffULL << 8)) << 40) |
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((data & (0xffULL << 16)) << 24) |
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((data & (0xffULL << 24)) << 8) |
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((data & (0xffULL << 32)) >> 8) |
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((data & (0xffULL << 40)) >> 24) |
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((data & (0xffULL << 48)) >> 40) |
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((data & (0xffULL << 56)) >> 56);
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return swap;
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}
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#define data2host2(ptr) __data2host2(*(unsigned short *)ptr)
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#define data2host4(ptr) __data2host4(*(unsigned int *)ptr)
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#define data2host8(ptr) __data2host8(*(unsigned long long *)ptr)
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extern int header_page_ts_offset;
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extern int header_page_ts_size;
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extern int header_page_size_offset;
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extern int header_page_size_size;
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extern int header_page_data_offset;
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extern int header_page_data_size;
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int parse_header_page(char *buf, unsigned long size);
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int trace_parse_common_type(void *data);
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struct event *trace_find_event(int id);
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unsigned long long
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raw_field_value(struct event *event, const char *name, void *data);
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void *raw_field_ptr(struct event *event, const char *name, void *data);
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void read_tracing_data(struct perf_event_attr *pattrs, int nb_events);
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#endif /* _TRACE_EVENTS_H */
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