提交 e2407bef 编写于 作者: A Andi Kleen 提交者: Arnaldo Carvalho de Melo

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: NAndi Kleen <ak@linux.intel.com>
Reviewed-by: NJiri 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: NArnaldo Carvalho de Melo <acme@redhat.com>
上级 5c6974f4
......@@ -634,15 +634,15 @@ int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
return evsel->fd != NULL ? 0 : -ENOMEM;
}
int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
const char *filter)
static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
int ioc, void *arg)
{
int cpu, thread;
for (cpu = 0; cpu < ncpus; cpu++) {
for (thread = 0; thread < nthreads; thread++) {
int fd = FD(evsel, cpu, thread),
err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
err = ioctl(fd, ioc, arg);
if (err)
return err;
......@@ -652,6 +652,21 @@ int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
return 0;
}
int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
const char *filter)
{
return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
PERF_EVENT_IOC_SET_FILTER,
(void *)filter);
}
int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
{
return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
PERF_EVENT_IOC_ENABLE,
0);
}
int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
{
evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
......
......@@ -146,6 +146,7 @@ void perf_evsel__set_sample_id(struct perf_evsel *evsel);
int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
const char *filter);
int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads);
int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
struct cpu_map *cpus);
......
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