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libperf: Adopt simplified perf_evsel__open() function from tools/perf

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Add a perf_evsel__open() function to libperf.

It's a simplified version of evsel__open() without the fallback
mechanism.

We can try to merge it in the future to libperf, but it has many
details, lets start simple, requiring the latest kernel, perf should
continue using its evsel__open() version, continuing to support running
on older kernels when possible.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-63-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2019-07-21 13:24:49 +02:00
committed by Arnaldo Carvalho de Melo
parent b8eca4d761
commit 50a4e6fa45
3 changed files with 70 additions and 0 deletions
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4
tools/perf/lib/include/perf/evsel.h
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@@ -6,10 +6,14 @@
struct perf_evsel;
struct perf_event_attr;
struct perf_cpu_map;
struct perf_thread_map;
LIBPERF_API void perf_evsel__init(struct perf_evsel *evsel,
struct perf_event_attr *attr);
LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel);
LIBPERF_API int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
struct perf_thread_map *threads);
#endif /* __LIBPERF_EVSEL_H */