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perf trace: Make --pf honour --min-stack too 

To check deeply nested page fault callchains.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-wuji34xx003kr88nmqt6jkgf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Arnaldo Carvalho de Melo 2016-04-20 20:06:02 -03:00
parent 7ad3561595
commit 1df5429046
1 changed files with 15 additions and 4 deletions
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19
tools/perf/builtin-trace.c
View File

@ -2190,8 +2190,19 @@ static int trace__pgfault(struct trace *trace,
char map_type = 'd';
struct thread_trace *ttrace;
int err = -1;
int callchain_ret = 0;
thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
if (sample->callchain) {
callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor);
if (callchain_ret == 0) {
if (callchain_cursor.nr < trace->min_stack)
goto out_put;
callchain_ret = 1;
}
}
ttrace = thread__trace(thread, trace->output);
if (ttrace == NULL)
goto out_put;
@ -2234,10 +2245,10 @@ static int trace__pgfault(struct trace *trace,
fprintf(trace->output, " (%c%c)\n", map_type, al.level);
if (sample->callchain) {
if (trace__resolve_callchain(trace, evsel, sample, &callchain_cursor) == 0)
trace__fprintf_callchain(trace, sample);
}
if (callchain_ret > 0)
trace__fprintf_callchain(trace, sample);
else if (callchain_ret < 0)
pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel));
out:
err = 0;
out_put: