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perf script: Don't disable use_callchain if input is pipe

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Because perf data from pipe do not have a header with evsel attr, we
should not check that and disable symbol_conf.use_callchain. Otherwise,
perf script won't show callchains even if the data stream contains
callchain.

Before:
  $ perf record -g -o - uname |perf script
  Linux
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
  uname  1828 182630.186578:  250000 cpu-clock:  ..b9499 setup_arg_pages
  uname  1828 182630.186850:  250000 cpu-clock:  ..83b20 ___might_sleep
  uname  1828 182630.187153:  250000 cpu-clock:  ..4b6be file_map_prot_ch
  ...

After:
  $ perf record -g -o - uname |perf script
  Linux
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
  uname  1833 182675.927099:     250000 cpu-clock:
                  ba5520 _raw_spin_lock+0xfe200040 ([kernel.kallsyms])
                  389dd4 expand_downwards+0xfe200154 ([kernel.kallsyms])
                  389f34 expand_stack+0xfe200024 ([kernel.kallsyms])
                  3b957e setup_arg_pages+0xfe20019e ([kernel.kallsyms])
                  40c80f load_elf_binary+0xfe20042f ([kernel.kallsyms])
                  ...

Signed-off-by: He Kuang <hekuang@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1470309943-153909-2-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
He Kuang
2016-08-04 11:25:43 +00:00
committed by Arnaldo Carvalho de Melo
parent 88ded4d8d9
commit 71ac899b5e
1 changed files with 3 additions and 1 deletions
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4
tools/perf/builtin-script.c
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@@ -371,14 +371,16 @@ static int perf_session__check_output_opt(struct perf_session *session)
if (!no_callchain) { if (!no_callchain) {
bool use_callchain = false; bool use_callchain = false;
bool not_pipe = false;
evlist__for_each_entry(session->evlist, evsel) { evlist__for_each_entry(session->evlist, evsel) {
not_pipe = true;
if (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) { if (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) {
use_callchain = true; use_callchain = true;
break; break;
} }
} }
if (!use_callchain) if (not_pipe && !use_callchain)
symbol_conf.use_callchain = false; symbol_conf.use_callchain = false;
} }