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perf tools: Parse the pmu event prefix and suffix

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There are two types of event formats for PMU events. E.g. el-abort OR
cpu/el-abort/. However, the lexer mistakenly recognizes the simple style
format as two events.

The parse_events_pmu_check function uses bsearch to search the name in
known pmu event list. It can tell the lexer that the name is a PE_NAME
or a PMU event name prefix or a PMU event name suffix. All these
information will be used for accurately parsing kernel PMU events.

The pmu events list will be read from sysfs at runtime.

Note: Currently, the patch only want to handle the PMU event name as
"a-b" and "a". The only exception, "stalled-cycles-frontend" and
"stalled-cycles-fronted", are already hardcoded in lexer.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1412694532-23391-3-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2014-10-07 11:08:50 -04:00 • committed by Arnaldo Carvalho de Melo
parent 42f60c2d63
commit dcb4e1022b
4 changed files with 141 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

14
tools/perf/util/parse-events.h
View file

@ -35,6 +35,18 @@ extern int parse_filter(const struct option *opt, const char *str, int unset);
#define EVENTS_HELP_MAX (128*1024)
enum perf_pmu_event_symbol_type {
PMU_EVENT_SYMBOL_ERR, /* not a PMU EVENT */
PMU_EVENT_SYMBOL, /* normal style PMU event */
PMU_EVENT_SYMBOL_PREFIX, /* prefix of pre-suf style event */
PMU_EVENT_SYMBOL_SUFFIX, /* suffix of pre-suf style event */
};
struct perf_pmu_event_symbol {
char *symbol;
enum perf_pmu_event_symbol_type type;
};
enum {
PARSE_EVENTS__TERM_TYPE_NUM,
PARSE_EVENTS__TERM_TYPE_STR,
@ -95,6 +107,8 @@ int parse_events_add_breakpoint(struct list_head *list, int *idx,
void *ptr, char *type);
int parse_events_add_pmu(struct list_head *list, int *idx,
char *pmu , struct list_head *head_config);
enum perf_pmu_event_symbol_type
perf_pmu__parse_check(const char *name);
void parse_events__set_leader(char *name, struct list_head *list);
void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all);