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perf_counter tools: Librarize event string parsing
Extract the event string parser from builtin-record.c, and librarize it - to be reused in other commands. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Ingo Molnar
parent
0e9b20b8a1
commit
8ad8db3788
@ -290,6 +290,7 @@ LIB_H += ../../include/linux/perf_counter.h
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LIB_H += perf.h
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LIB_H += util/levenshtein.h
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LIB_H += util/parse-options.h
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LIB_H += util/parse-events.h
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LIB_H += util/quote.h
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LIB_H += util/util.h
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LIB_H += util/help.h
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@ -304,6 +305,7 @@ LIB_OBJS += util/exec_cmd.o
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LIB_OBJS += util/help.o
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LIB_OBJS += util/levenshtein.o
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LIB_OBJS += util/parse-options.o
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LIB_OBJS += util/parse-events.o
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LIB_OBJS += util/path.o
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LIB_OBJS += util/run-command.o
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LIB_OBJS += util/quote.o
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@ -3,44 +3,17 @@
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#include "perf.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/exec_cmd.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <errno.h>
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#include <time.h>
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#include <sched.h>
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#include <pthread.h>
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#include <sys/syscall.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <sys/prctl.h>
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#include <sys/wait.h>
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#include <sys/uio.h>
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#include <sys/mman.h>
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#include <linux/unistd.h>
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#include <linux/types.h>
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#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
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#define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask))
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static int nr_counters = 0;
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static __u64 event_id[MAX_COUNTERS] = { };
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static int default_interval = 100000;
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static int event_count[MAX_COUNTERS];
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static int fd[MAX_NR_CPUS][MAX_COUNTERS];
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static int nr_cpus = 0;
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static unsigned int page_size;
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@ -420,131 +393,16 @@ static int __cmd_record(int argc, const char **argv)
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return 0;
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}
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struct event_symbol {
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__u64 event;
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char *symbol;
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};
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static struct event_symbol event_symbols[] = {
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cpu-cycles", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cycles", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_INSTRUCTIONS), "instructions", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES), "cache-references", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES), "cache-misses", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branch-instructions", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branches", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_MISSES), "branch-misses", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BUS_CYCLES), "bus-cycles", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK), "cpu-clock", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), "task-clock", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "page-faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MIN), "minor-faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MAJ), "major-faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "context-switches", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "cs", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "cpu-migrations", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "migrations", },
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};
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/*
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* Each event can have multiple symbolic names.
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* Symbolic names are (almost) exactly matched.
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*/
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static __u64 match_event_symbols(const char *str)
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{
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__u64 config, id;
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int type;
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unsigned int i;
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if (sscanf(str, "r%llx", &config) == 1)
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return config | PERF_COUNTER_RAW_MASK;
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if (sscanf(str, "%d:%llu", &type, &id) == 2)
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return EID(type, id);
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for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
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if (!strncmp(str, event_symbols[i].symbol,
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strlen(event_symbols[i].symbol)))
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return event_symbols[i].event;
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}
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return ~0ULL;
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}
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static int parse_events(const struct option *opt, const char *str, int unset)
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{
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__u64 config;
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again:
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if (nr_counters == MAX_COUNTERS)
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return -1;
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config = match_event_symbols(str);
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if (config == ~0ULL)
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return -1;
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event_id[nr_counters] = config;
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nr_counters++;
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str = strstr(str, ",");
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if (str) {
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str++;
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goto again;
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}
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return 0;
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}
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static char events_help[100000];
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#define __PERF_COUNTER_FIELD(config, name) \
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((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)
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#define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW)
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#define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG)
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#define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE)
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#define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT)
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static void create_events_help(void)
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{
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unsigned int i;
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char *str;
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__u64 e;
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str = events_help;
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str += sprintf(str,
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"event name: [");
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for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
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int type, id;
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e = event_symbols[i].event;
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type = PERF_COUNTER_TYPE(e);
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id = PERF_COUNTER_ID(e);
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if (i)
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str += sprintf(str, "|");
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str += sprintf(str, "%s",
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event_symbols[i].symbol);
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}
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str += sprintf(str, "|rNNN]");
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}
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static const char * const record_usage[] = {
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"perf record [<options>] <command>",
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NULL
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};
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static char events_help_msg[EVENTS_HELP_MAX];
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const struct option options[] = {
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OPT_CALLBACK('e', "event", NULL, "event",
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events_help, parse_events),
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events_help_msg, parse_events),
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OPT_INTEGER('c', "count", &default_interval,
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"event period to sample"),
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OPT_INTEGER('m', "mmap-pages", &mmap_pages,
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@ -566,7 +424,7 @@ int cmd_record(int argc, const char **argv, const char *prefix)
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{
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int counter;
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create_events_help();
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create_events_help(events_help_msg);
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argc = parse_options(argc, argv, options, record_usage, 0);
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if (!argc)
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127
Documentation/perf_counter/util/parse-events.c
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127
Documentation/perf_counter/util/parse-events.c
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@ -0,0 +1,127 @@
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#include "../perf.h"
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#include "util.h"
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#include "parse-options.h"
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#include "parse-events.h"
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#include "exec_cmd.h"
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int nr_counters;
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__u64 event_id[MAX_COUNTERS] = { };
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struct event_symbol {
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__u64 event;
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char *symbol;
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};
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static struct event_symbol event_symbols[] = {
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cpu-cycles", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cycles", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_INSTRUCTIONS), "instructions", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES), "cache-references", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES), "cache-misses", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branch-instructions", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branches", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_MISSES), "branch-misses", },
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{EID(PERF_TYPE_HARDWARE, PERF_COUNT_BUS_CYCLES), "bus-cycles", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK), "cpu-clock", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), "task-clock", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "page-faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MIN), "minor-faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MAJ), "major-faults", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "context-switches", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "cs", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "cpu-migrations", },
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{EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "migrations", },
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};
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/*
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* Each event can have multiple symbolic names.
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* Symbolic names are (almost) exactly matched.
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*/
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static __u64 match_event_symbols(const char *str)
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{
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__u64 config, id;
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int type;
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unsigned int i;
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if (sscanf(str, "r%llx", &config) == 1)
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return config | PERF_COUNTER_RAW_MASK;
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if (sscanf(str, "%d:%llu", &type, &id) == 2)
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return EID(type, id);
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for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
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if (!strncmp(str, event_symbols[i].symbol,
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strlen(event_symbols[i].symbol)))
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return event_symbols[i].event;
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}
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return ~0ULL;
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}
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int parse_events(const struct option *opt, const char *str, int unset)
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{
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__u64 config;
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again:
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if (nr_counters == MAX_COUNTERS)
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return -1;
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config = match_event_symbols(str);
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if (config == ~0ULL)
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return -1;
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event_id[nr_counters] = config;
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nr_counters++;
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str = strstr(str, ",");
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if (str) {
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str++;
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goto again;
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}
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return 0;
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}
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#define __PERF_COUNTER_FIELD(config, name) \
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((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)
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#define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW)
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#define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG)
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#define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE)
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#define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT)
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/*
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* Create the help text for the event symbols:
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*/
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void create_events_help(char *events_help_msg)
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{
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unsigned int i;
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char *str;
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__u64 e;
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str = events_help_msg;
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str += sprintf(str,
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"event name: [");
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for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
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int type, id;
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e = event_symbols[i].event;
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type = PERF_COUNTER_TYPE(e);
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id = PERF_COUNTER_ID(e);
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if (i)
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str += sprintf(str, "|");
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str += sprintf(str, "%s",
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event_symbols[i].symbol);
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}
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str += sprintf(str, "|rNNN]");
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}
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10
Documentation/perf_counter/util/parse-events.h
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10
Documentation/perf_counter/util/parse-events.h
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@ -0,0 +1,10 @@
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extern int nr_counters;
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extern __u64 event_id[MAX_COUNTERS];
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extern int parse_events(const struct option *opt, const char *str, int unset);
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#define EVENTS_HELP_MAX (128*1024)
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extern void create_events_help(char *help_msg);
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