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| author | Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> | 2018-01-30 11:00:53 +0530 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-02-05 13:53:45 -0300 |
| commit | 3a9e9a47092e302f3c75ababebfc16e196400a93 (patch) | |
| tree | 3e91e5bdc5b11848070368b0cb20322567a6fd16 /tools | |
| parent | 11974914e8e6d44387b4b23fa6dbd40c94baeb8d (diff) | |
| download | linux-3a9e9a47092e302f3c75ababebfc16e196400a93.tar.gz linux-3a9e9a47092e302f3c75ababebfc16e196400a93.tar.bz2 linux-3a9e9a47092e302f3c75ababebfc16e196400a93.zip | |
perf trace: Fix call-graph output
Recently, Arnaldo fixed global vs event specific --max-stack usage with
commit bd3dda9ab0fb ("perf trace: Allow overriding global --max-stack
per event"). This commit is having a regression when we don't use
--max-stack at all with perf trace. Ex,
$ ./perf trace record -g ls
$ ./perf trace -i perf.data
0.076 ( 0.002 ms): ls/9109 brk(
0.196 ( 0.008 ms): ls/9109 access(filename: 0x9f998b70, mode: R
0.209 ( 0.031 ms): ls/9109 open(filename: 0x9f998978, flags: CLOEXEC
This is missing call-traces.
After patch:
$ ./perf trace -i perf.data
0.076 ( 0.002 ms): ls/9109 brk(
do_syscall_trace_leave ([kernel.kallsyms])
[0] ([unknown])
syscall_exit_work ([kernel.kallsyms])
brk (/usr/lib64/ld-2.17.so)
_dl_sysdep_start (/usr/lib64/ld-2.17.so)
_dl_start_final (/usr/lib64/ld-2.17.so)
_dl_start (/usr/lib64/ld-2.17.so)
_start (/usr/lib64/ld-2.17.so)
0.196 ( 0.008 ms): ls/9109 access(filename: 0x9f998b70, mode: R
do_syscall_trace_leave ([kernel.kallsyms])
[0] ([unknown])
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: bd3dda9ab0fb ("perf trace: Allow overriding global --max-stack per event")
Link: http://lkml.kernel.org/r/20180130053053.13214-3-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-trace.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 17d11deeb88d..e7f1b182fc15 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1661,9 +1661,12 @@ static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evse struct callchain_cursor *cursor) { struct addr_location al; + int max_stack = evsel->attr.sample_max_stack ? + evsel->attr.sample_max_stack : + trace->max_stack; if (machine__resolve(trace->host, &al, sample) < 0 || - thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, evsel->attr.sample_max_stack)) + thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack)) return -1; return 0; |