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perf pmu: Extract function to get JSON alias map

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Extract the code to get the per cpu JSON alias into a separate function
for reuse. No behavior changes.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20170831194036.30146-6-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2017-08-31 12:40:30 -07:00 committed by Arnaldo Carvalho de Melo
parent 4ed962eb38
commit d77ade9f41
2 changed files with 45 additions and 26 deletions
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69
tools/perf/util/pmu.c
View file

@ -516,6 +516,47 @@ char * __weak get_cpuid_str(void)
return NULL;
}
static char *perf_pmu__getcpuid(void)
{
char *cpuid;
static bool printed;
cpuid = getenv("PERF_CPUID");
if (cpuid)
cpuid = strdup(cpuid);
if (!cpuid)
cpuid = get_cpuid_str();
if (!cpuid)
return NULL;
if (!printed) {
pr_debug("Using CPUID %s\n", cpuid);
printed = true;
}
return cpuid;
}
struct pmu_events_map *perf_pmu__find_map(void)
{
struct pmu_events_map *map;
char *cpuid = perf_pmu__getcpuid();
int i;
i = 0;
for (;;) {
map = &pmu_events_map[i++];
if (!map->table) {
map = NULL;
break;
}
if (!strcmp(map->cpuid, cpuid))
break;
}
free(cpuid);
return map;
}
/*
* From the pmu_events_map, find the table of PMU events that corresponds
* to the current running CPU. Then, add all PMU events from that table
@ -526,32 +567,11 @@ static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
int i;
struct pmu_events_map *map;
struct pmu_event *pe;
char *cpuid;
static bool printed;
cpuid = getenv("PERF_CPUID");
if (cpuid)
cpuid = strdup(cpuid);
if (!cpuid)
cpuid = get_cpuid_str();
if (!cpuid)
map = perf_pmu__find_map();
if (!map)
return;
if (!printed) {
pr_debug("Using CPUID %s\n", cpuid);
printed = true;
}
i = 0;
while (1) {
map = &pmu_events_map[i++];
if (!map->table)
goto out;
if (!strcmp(map->cpuid, cpuid))
break;
}
/*
* Found a matching PMU events table. Create aliases
*/
@ -575,9 +595,6 @@ static void pmu_add_cpu_aliases(struct list_head *head, const char *name)
(char *)pe->metric_expr,
(char *)pe->metric_name);
}
out:
free(cpuid);
}
struct perf_event_attr * __weak

2
tools/perf/util/pmu.h
View file

@ -90,4 +90,6 @@ int perf_pmu__test(void);
struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);
struct pmu_events_map *perf_pmu__find_map(void);
#endif /* __PMU_H */