perf evsel: Add functions to enable/disable for a specific CPU

Refactor the existing functions to use these functions internally.

Used in the next patch.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20191121001522.180827-12-andi@firstfloor.org
Link: http://lore.kernel.org/lkml/20191127232657.GL84886@tassilo.jf.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/lib/evsel.c b/tools/perf/lib/evsel.c
index ea775da..4dc0628 100644 (file)
--- a/tools/perf/lib/evsel.c
+++ b/tools/perf/lib/evsel.c
@@ -198,38 +198,61 @@ int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
 }
 
 static int perf_evsel__run_ioctl(struct perf_evsel *evsel,
-                                int ioc,  void *arg)
+                                int ioc,  void *arg,
+                                int cpu)
 {
-       int cpu, thread;
+       int thread;
 
-       for (cpu = 0; cpu < xyarray__max_x(evsel->fd); cpu++) {
-               for (thread = 0; thread < xyarray__max_y(evsel->fd); thread++) {
-                       int fd = FD(evsel, cpu, thread),
-                           err = ioctl(fd, ioc, arg);
+       for (thread = 0; thread < xyarray__max_y(evsel->fd); thread++) {
+               int fd = FD(evsel, cpu, thread),
+                   err = ioctl(fd, ioc, arg);
 
-                       if (err)
-                               return err;
-               }
+               if (err)
+                       return err;
        }
 
        return 0;
 }
 
+int perf_evsel__enable_cpu(struct perf_evsel *evsel, int cpu)
+{
+       return perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_ENABLE, NULL, cpu);
+}
+
 int perf_evsel__enable(struct perf_evsel *evsel)
 {
-       return perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_ENABLE, 0);
+       int i;
+       int err = 0;
+
+       for (i = 0; i < xyarray__max_x(evsel->fd) && !err; i++)
+               err = perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_ENABLE, NULL, i);
+       return err;
+}
+
+int perf_evsel__disable_cpu(struct perf_evsel *evsel, int cpu)
+{
+       return perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_DISABLE, NULL, cpu);
 }
 
 int perf_evsel__disable(struct perf_evsel *evsel)
 {
-       return perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_DISABLE, 0);
+       int i;
+       int err = 0;
+
+       for (i = 0; i < xyarray__max_x(evsel->fd) && !err; i++)
+               err = perf_evsel__run_ioctl(evsel, PERF_EVENT_IOC_DISABLE, NULL, i);
+       return err;
 }
 
 int perf_evsel__apply_filter(struct perf_evsel *evsel, const char *filter)
 {
-       return perf_evsel__run_ioctl(evsel,
+       int err = 0, i;
+
+       for (i = 0; i < evsel->cpus->nr && !err; i++)
+               err = perf_evsel__run_ioctl(evsel,
                                     PERF_EVENT_IOC_SET_FILTER,
-                                    (void *)filter);
+                                    (void *)filter, i);
+       return err;
 }
 
 struct perf_cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)

diff --git a/tools/perf/lib/include/perf/evsel.h b/tools/perf/lib/include/perf/evsel.h
index e7add55..c82ec39 100644 (file)
--- a/tools/perf/lib/include/perf/evsel.h
+++ b/tools/perf/lib/include/perf/evsel.h
@@ -30,7 +30,9 @@ LIBPERF_API void perf_evsel__close_cpu(struct perf_evsel *evsel, int cpu);
 LIBPERF_API int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
                                 struct perf_counts_values *count);
 LIBPERF_API int perf_evsel__enable(struct perf_evsel *evsel);
+LIBPERF_API int perf_evsel__enable_cpu(struct perf_evsel *evsel, int cpu);
 LIBPERF_API int perf_evsel__disable(struct perf_evsel *evsel);
+LIBPERF_API int perf_evsel__disable_cpu(struct perf_evsel *evsel, int cpu);
 LIBPERF_API struct perf_cpu_map *perf_evsel__cpus(struct perf_evsel *evsel);
 LIBPERF_API struct perf_thread_map *perf_evsel__threads(struct perf_evsel *evsel);
 LIBPERF_API struct perf_event_attr *perf_evsel__attr(struct perf_evsel *evsel);

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index aa180d1..a69e642 100644 (file)
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1223,16 +1223,27 @@ int perf_evsel__append_addr_filter(struct evsel *evsel, const char *filter)
        return perf_evsel__append_filter(evsel, "%s,%s", filter);
 }
 
+/* Caller has to clear disabled after going through all CPUs. */
+int evsel__enable_cpu(struct evsel *evsel, int cpu)
+{
+       return perf_evsel__enable_cpu(&evsel->core, cpu);
+}
+
 int evsel__enable(struct evsel *evsel)
 {
        int err = perf_evsel__enable(&evsel->core);
 
        if (!err)
                evsel->disabled = false;
-
        return err;
 }
 
+/* Caller has to set disabled after going through all CPUs. */
+int evsel__disable_cpu(struct evsel *evsel, int cpu)
+{
+       return perf_evsel__disable_cpu(&evsel->core, cpu);
+}
+
 int evsel__disable(struct evsel *evsel)
 {
        int err = perf_evsel__disable(&evsel->core);

diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index c8af4bc..dc14f4a 100644 (file)
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -222,8 +222,10 @@ int perf_evsel__set_filter(struct evsel *evsel, const char *filter);
 int perf_evsel__append_tp_filter(struct evsel *evsel, const char *filter);
 int perf_evsel__append_addr_filter(struct evsel *evsel,
                                   const char *filter);
+int evsel__enable_cpu(struct evsel *evsel, int cpu);
 int evsel__enable(struct evsel *evsel);
 int evsel__disable(struct evsel *evsel);
+int evsel__disable_cpu(struct evsel *evsel, int cpu);
 
 int perf_evsel__open_per_cpu(struct evsel *evsel,
                             struct perf_cpu_map *cpus,