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perf evsel: Add support for enabling counters
Add support for enabling already set up counters by using an ioctl. I share some code with the filter setup. Signed-off-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1375490473-1503-3-git-send-email-andi@firstfloor.org [ Fixed up 'err' variable indentation ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -634,15 +634,15 @@ int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
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return evsel->fd != NULL ? 0 : -ENOMEM;
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}
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int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
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const char *filter)
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static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
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int ioc, void *arg)
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{
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int cpu, thread;
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for (cpu = 0; cpu < ncpus; cpu++) {
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for (thread = 0; thread < nthreads; thread++) {
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int fd = FD(evsel, cpu, thread),
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err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
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err = ioctl(fd, ioc, arg);
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if (err)
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return err;
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@ -652,6 +652,21 @@ int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
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return 0;
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}
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int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
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const char *filter)
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{
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return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
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PERF_EVENT_IOC_SET_FILTER,
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(void *)filter);
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}
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int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
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{
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return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
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PERF_EVENT_IOC_ENABLE,
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0);
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}
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int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
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{
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evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
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@ -146,6 +146,7 @@ void perf_evsel__set_sample_id(struct perf_evsel *evsel);
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int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
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const char *filter);
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int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads);
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int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
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struct cpu_map *cpus);
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