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authorArnaldo Carvalho de Melo <acme@redhat.com>2013-09-24 11:56:36 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-10-11 12:17:10 -0300
commitb52bc23414124b0d37fd9933b5a894d9b4a9720d (patch)
treef40d13837db31708053f73039206645309f7d447 /tools/perf/perf.c
parent75b757ca90469e990e6901f4a9497fe4161f7f5a (diff)
downloadlinux-b52bc23414124b0d37fd9933b5a894d9b4a9720d.tar.gz
perf trace: Add 'trace' alias to 'perf trace'
Make 'perf trace' more accessible by aliasing it to just 'trace': [root@zoo linux]# trace --duration 15 -a -e futex sleep 1 110.092 (16.188 ms): libvirtd/1166 futex(uaddr: 0x185b344, op: WAIT|PRIV, val: 174293 ) = 0 110.101 (15.903 ms): libvirtd/1171 futex(uaddr: 0x185b3dc, op: WAIT|PRIV, val: 139265 ) = 0 111.594 (15.776 ms): libvirtd/1165 futex(uaddr: 0x185b344, op: WAIT|PRIV, val: 174295 ) = 0 111.610 (15.969 ms): libvirtd/1169 futex(uaddr: 0x185b3dc, op: WAIT|PRIV, val: 139267 ) = 0 113.556 (16.216 ms): libvirtd/1168 futex(uaddr: 0x185b3dc, op: WAIT|PRIV, val: 139269 ) = 0 291.265 (199.508 ms): chromium-brows/15830 futex(uaddr: 0x7fff2986bcb4, op: WAIT_BITSET|PRIV|CLKRT, val: 1, utime: 0x7fff2986bab0, val3: 4294967295) = -1 ETIMEDOUT Connection timed out 360.354 (69.053 ms): chromium-brows/15830 futex(uaddr: 0x7fff2986bcb4, op: WAIT_BITSET|PRIV|CLKRT, val: 1, utime: 0x7fff2986bab0, val3: 4294967295) = -1 ETIMEDOUT Connection timed out [root@zoo linux]# I.e. looking for futex calls that take at least 15ms, system wide, during a one second window. Now to get callchains into 'trace' to figure out what are those locks :-) Requested-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-ch4smqz8b5fmgrte7c5e4fuw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/perf.c')
-rw-r--r--tools/perf/perf.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 626577830264..8b38b4e80ec2 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -481,7 +481,14 @@ int main(int argc, const char **argv)
fprintf(stderr, "cannot handle %s internally", cmd);
goto out;
}
-
+#ifdef HAVE_LIBAUDIT_SUPPORT
+ if (!prefixcmp(cmd, "trace")) {
+ set_buildid_dir();
+ setup_path();
+ argv[0] = "trace";
+ return cmd_trace(argc, argv, NULL);
+ }
+#endif
/* Look for flags.. */
argv++;
argc--;