Merge tag 'mac80211-for-davem-2016-07-06' of git://git.kernel.org/pub/scm/linux/kerne...

[cascardo/linux.git] / tools / perf / util / evlist.c

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index c4bfe11..e82ba90 100644 (file)
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -44,6 +44,7 @@ void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
        perf_evlist__set_maps(evlist, cpus, threads);
        fdarray__init(&evlist->pollfd, 64);
        evlist->workload.pid = -1;
+       evlist->backward = false;
 }
 
 struct perf_evlist *perf_evlist__new(void)
@@ -679,6 +680,33 @@ static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist,
        return NULL;
 }
 
+static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value)
+{
+       int i;
+
+       for (i = 0; i < evlist->nr_mmaps; i++) {
+               int fd = evlist->mmap[i].fd;
+               int err;
+
+               if (fd < 0)
+                       continue;
+               err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0);
+               if (err)
+                       return err;
+       }
+       return 0;
+}
+
+int perf_evlist__pause(struct perf_evlist *evlist)
+{
+       return perf_evlist__set_paused(evlist, true);
+}
+
+int perf_evlist__resume(struct perf_evlist *evlist)
+{
+       return perf_evlist__set_paused(evlist, false);
+}
+
 /* When check_messup is true, 'end' must points to a good entry */
 static union perf_event *
 perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start,
@@ -881,6 +909,7 @@ static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx)
        if (evlist->mmap[idx].base != NULL) {
                munmap(evlist->mmap[idx].base, evlist->mmap_len);
                evlist->mmap[idx].base = NULL;
+               evlist->mmap[idx].fd = -1;
                atomic_set(&evlist->mmap[idx].refcnt, 0);
        }
        auxtrace_mmap__munmap(&evlist->mmap[idx].auxtrace_mmap);
@@ -901,10 +930,14 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
 
 static int perf_evlist__alloc_mmap(struct perf_evlist *evlist)
 {
+       int i;
+
        evlist->nr_mmaps = cpu_map__nr(evlist->cpus);
        if (cpu_map__empty(evlist->cpus))
                evlist->nr_mmaps = thread_map__nr(evlist->threads);
        evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
+       for (i = 0; i < evlist->nr_mmaps; i++)
+               evlist->mmap[i].fd = -1;
        return evlist->mmap != NULL ? 0 : -ENOMEM;
 }
 
@@ -941,6 +974,7 @@ static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx,
                evlist->mmap[idx].base = NULL;
                return -1;
        }
+       evlist->mmap[idx].fd = fd;
 
        if (auxtrace_mmap__mmap(&evlist->mmap[idx].auxtrace_mmap,
                                &mp->auxtrace_mp, evlist->mmap[idx].base, fd))