openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

perf evlist: Introduce append_tp_filter() method 

Will be used by 'perf trace' to support 'perf trace --filter', we need
to append to any pre-existing filter.

When parse_filter() gets invoked to process --filter, it'll set the
filter to that specified on the command line, later on, when we filter
out 'perf trace' own pid to avoid an event feedback loop, we need to
preserve the command line filter put in place by parse_filter().

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-h9rot08qmxlnfmte0holt68x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2019-10-07 16:52:17 -03:00
parent 05cea4492c
commit 53c92f7338
2 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
tools/perf/util/evlist.c
View File

@ -1068,6 +1068,26 @@ int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter)
return err;
}
int perf_evlist__append_tp_filter(struct evlist *evlist, const char *filter)
{
struct evsel *evsel;
int err = 0;
if (filter == NULL)
return -1;
evlist__for_each_entry(evlist, evsel) {
if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
continue;
err = perf_evsel__append_tp_filter(evsel, filter);
if (err)
break;
}
return err;
}
static char *asprintf__tp_filter_pids(size_t npids, pid_t *pids)
{
char *filter;

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

@ -140,6 +140,8 @@ int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter);
int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid);
int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids);
int perf_evlist__append_tp_filter(struct evlist *evlist, const char *filter);
struct evsel *
perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id);