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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
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10
tools/perf/util/pmu.c
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@@ -12,16 +12,6 @@
#include "parse-events.h"
#include "cpumap.h"
#define UNIT_MAX_LEN 31 /* max length for event unit name */
struct perf_pmu_alias {
char *name;
struct list_head terms; /* HEAD struct parse_events_term -> list */
struct list_head list; /* ELEM */
char unit[UNIT_MAX_LEN+1];
double scale;
};
struct perf_pmu_format {
char *name;
int value;