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authorWei Li <liwei391@huawei.com>2020-02-14 15:26:50 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-02-18 10:13:29 -0300
commit2da4dd3d6973ffdfba4fa07f53240fda7ab22929 (patch)
treefb49660c6605b51822b1cd8694ab9ca96a044dd2 /tools/perf
parent2bbc83537614517730e9f2811195004b712de207 (diff)
downloadlinux-2da4dd3d6973ffdfba4fa07f53240fda7ab22929.tar.bz2
perf intel-pt: Fix endless record after being terminated
In __cmd_record(), when receiving SIGINT(ctrl + c), a 'done' flag will be set and the event list will be disabled by evlist__disable() once. While in auxtrace_record.read_finish(), the related events will be enabled again, if they are continuous, the recording seems to be endless. If the intel_pt event is disabled, we don't enable it again here. Before the patch: huawei@huawei-2288H-V5:~/linux-5.5-rc4/tools/perf$ ./perf record -e \ intel_pt//u -p 46803 ^C^C^C^C^C^C After the patch: huawei@huawei-2288H-V5:~/linux-5.5-rc4/tools/perf$ ./perf record -e \ intel_pt//u -p 48591 ^C[ perf record: Woken up 0 times to write data ] Warning: AUX data lost 504 times out of 4816! [ perf record: Captured and wrote 2024.405 MB perf.data ] Signed-off-by: Wei Li <liwei391@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Tan Xiaojun <tanxiaojun@huawei.com> Cc: stable@vger.kernel.org # 5.4+ Link: http://lore.kernel.org/lkml/20200214132654.20395-2-adrian.hunter@intel.com [ ahunter: removed redundant 'else' after 'return' ] Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/arch/x86/util/intel-pt.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 20df442fdf36..be07d6886256 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -1173,9 +1173,12 @@ static int intel_pt_read_finish(struct auxtrace_record *itr, int idx)
struct evsel *evsel;
evlist__for_each_entry(ptr->evlist, evsel) {
- if (evsel->core.attr.type == ptr->intel_pt_pmu->type)
+ if (evsel->core.attr.type == ptr->intel_pt_pmu->type) {
+ if (evsel->disabled)
+ return 0;
return perf_evlist__enable_event_idx(ptr->evlist, evsel,
idx);
+ }
}
return -EINVAL;
}