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perf tools: Add per-pkg format file parsing

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The .per-pkg file indicates that all but one value per socket should be
discarded. Adding support to check up this file and set event flag
accordingly.

This patch is part of Matt's original patch:

http://marc.info/?l=linux-kernel&m=141527675002139&w=2 only the file
parsing part, the rest is solved differently.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1416562275-12404-9-git-send-email-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Matt Fleming 2014-11-21 10:31:12 +01:00 committed by Arnaldo Carvalho de Melo
parent 011dccbdd9
commit 044330c184
4 changed files with 31 additions and 0 deletions
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1
tools/perf/util/evsel.h
View File

@ -91,6 +91,7 @@ struct perf_evsel {
bool immediate;
bool system_wide;
bool tracking;
bool per_pkg;
/* parse modifier helper */
int exclude_GH;
int nr_members;

1
tools/perf/util/parse-events.c
View File

@ -681,6 +681,7 @@ int parse_events_add_pmu(struct list_head *list, int *idx,
if (evsel) {
evsel->unit = info.unit;
evsel->scale = info.scale;
evsel->per_pkg = info.per_pkg;
}
return evsel ? 0 : -ENOMEM;

27
tools/perf/util/pmu.c
View File

@ -163,6 +163,24 @@ static int perf_pmu__parse_unit(struct perf_pmu_alias *alias, char *dir, char *n
return -1;
}
static int
perf_pmu__parse_per_pkg(struct perf_pmu_alias *alias, char *dir, char *name)
{
char path[PATH_MAX];
int fd;
snprintf(path, PATH_MAX, "%s/%s.per-pkg", dir, name);
fd = open(path, O_RDONLY);
if (fd == -1)
return -1;
close(fd);
alias->per_pkg = true;
return 0;
}
static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FILE *file)
{
struct perf_pmu_alias *alias;
@ -181,6 +199,7 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI
INIT_LIST_HEAD(&alias->terms);
alias->scale = 1.0;
alias->unit[0] = '\0';
alias->per_pkg = false;
ret = parse_events_terms(&alias->terms, buf);
if (ret) {
@ -194,6 +213,7 @@ static int perf_pmu__new_alias(struct list_head *list, char *dir, char *name, FI
*/
perf_pmu__parse_unit(alias, dir, name);
perf_pmu__parse_scale(alias, dir, name);
perf_pmu__parse_per_pkg(alias, dir, name);
list_add_tail(&alias->list, list);
@ -209,6 +229,8 @@ static inline bool pmu_alias_info_file(char *name)
return true;
if (len > 6 && !strcmp(name + len - 6, ".scale"))
return true;
if (len > 8 && !strcmp(name + len - 8, ".per-pkg"))
return true;
return false;
}
@ -649,6 +671,8 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
struct perf_pmu_alias *alias;
int ret;
info->per_pkg = false;
/*
* Mark unit and scale as not set
* (different from default values, see below)
@ -668,6 +692,9 @@ int perf_pmu__check_alias(struct perf_pmu *pmu, struct list_head *head_terms,
if (ret)
return ret;
if (alias->per_pkg)
info->per_pkg = true;
list_del(&term->list);
free(term);
}

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

@ -29,6 +29,7 @@ struct perf_pmu {
struct perf_pmu_info {
const char *unit;
double scale;
bool per_pkg;
};
#define UNIT_MAX_LEN 31 /* max length for event unit name */
@ -39,6 +40,7 @@ struct perf_pmu_alias {
struct list_head list; /* ELEM */
char unit[UNIT_MAX_LEN+1];
double scale;
bool per_pkg;
};
struct perf_pmu *perf_pmu__find(const char *name);