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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
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May 26, 2009
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
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| #include "../perf.h" | ||
| #include "util.h" | ||
| #include "parse-options.h" | ||
| #include "parse-events.h" | ||
| #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 { | ||
| __u64 event; | ||
| char *symbol; | ||
| }; | ||
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| static struct event_symbol event_symbols[] = { | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cpu-cycles", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), "cycles", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_INSTRUCTIONS), "instructions", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES), "cache-references", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES), "cache-misses", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branch-instructions", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_INSTRUCTIONS), "branches", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BRANCH_MISSES), "branch-misses", }, | ||
| {EID(PERF_TYPE_HARDWARE, PERF_COUNT_BUS_CYCLES), "bus-cycles", }, | ||
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| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_CLOCK), "cpu-clock", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), "task-clock", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "page-faults", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), "faults", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MIN), "minor-faults", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS_MAJ), "major-faults", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "context-switches", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), "cs", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "cpu-migrations", }, | ||
| {EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), "migrations", }, | ||
| }; | ||
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| /* | ||
| * Each event can have multiple symbolic names. | ||
| * Symbolic names are (almost) exactly matched. | ||
| */ | ||
| static __u64 match_event_symbols(const char *str) | ||
| { | ||
| __u64 config, id; | ||
| int type; | ||
| unsigned int i; | ||
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| if (sscanf(str, "r%llx", &config) == 1) | ||
| return config | PERF_COUNTER_RAW_MASK; | ||
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| if (sscanf(str, "%d:%llu", &type, &id) == 2) | ||
| return EID(type, id); | ||
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| for (i = 0; i < ARRAY_SIZE(event_symbols); i++) { | ||
| if (!strncmp(str, event_symbols[i].symbol, | ||
| strlen(event_symbols[i].symbol))) | ||
| return event_symbols[i].event; | ||
| } | ||
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| return ~0ULL; | ||
| } | ||
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| int parse_events(const struct option *opt, const char *str, int unset) | ||
| { | ||
| __u64 config; | ||
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| again: | ||
| if (nr_counters == MAX_COUNTERS) | ||
| return -1; | ||
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| config = match_event_symbols(str); | ||
| if (config == ~0ULL) | ||
| return -1; | ||
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| event_id[nr_counters] = config; | ||
| nr_counters++; | ||
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| str = strstr(str, ","); | ||
| if (str) { | ||
| str++; | ||
| goto again; | ||
| } | ||
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| return 0; | ||
| } | ||
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| #define __PERF_COUNTER_FIELD(config, name) \ | ||
| ((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT) | ||
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| #define PERF_COUNTER_RAW(config) __PERF_COUNTER_FIELD(config, RAW) | ||
| #define PERF_COUNTER_CONFIG(config) __PERF_COUNTER_FIELD(config, CONFIG) | ||
| #define PERF_COUNTER_TYPE(config) __PERF_COUNTER_FIELD(config, TYPE) | ||
| #define PERF_COUNTER_ID(config) __PERF_COUNTER_FIELD(config, EVENT) | ||
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| /* | ||
| * Create the help text for the event symbols: | ||
| */ | ||
| void create_events_help(char *events_help_msg) | ||
| { | ||
| unsigned int i; | ||
| char *str; | ||
| __u64 e; | ||
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| str = events_help_msg; | ||
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| str += sprintf(str, | ||
| "event name: ["); | ||
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| for (i = 0; i < ARRAY_SIZE(event_symbols); i++) { | ||
| int type, id; | ||
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| e = event_symbols[i].event; | ||
| type = PERF_COUNTER_TYPE(e); | ||
| id = PERF_COUNTER_ID(e); | ||
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| if (i) | ||
| str += sprintf(str, "|"); | ||
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| str += sprintf(str, "%s", | ||
| event_symbols[i].symbol); | ||
| } | ||
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| str += sprintf(str, "|rNNN]"); | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
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| extern int nr_counters; | ||
| 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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