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Commit b52bc23414124b0d37fd9933b5a894d9b4a9720d

Authored by Arnaldo Carvalho de Melo
1 parent 75b757ca90
Exists in smarc-imx_3.14.28_1.0.0_ga and in 1 other branch imx_3.14.28_1.0.0_ga

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>

Showing 2 changed files with 10 additions and 1 deletions Side-by-side Diff

tools/perf/Makefile.perf
Diff comments   View file @ b52bc23
... ... @@ -78,6 +78,7 @@
78 78 AR = $(CROSS_COMPILE)ar
79 79  
80 80 RM = rm -f
  81 +LN = ln -f
81 82 MKDIR = mkdir
82 83 FIND = find
83 84 INSTALL = install
... ... @@ -809,6 +810,7 @@
809 810 install-bin: all install-gtk
810 811 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(bindir_SQ)'
811 812 $(INSTALL) $(OUTPUT)perf '$(DESTDIR_SQ)$(bindir_SQ)'
  813 + $(LN) '$(DESTDIR_SQ)$(bindir_SQ)/perf' '$(DESTDIR_SQ)$(bindir_SQ)/trace'
812 814 $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
813 815 $(INSTALL) $(OUTPUT)perf-archive -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
814 816 ifndef NO_LIBPERL
... ... @@ -481,7 +481,14 @@
481 481 fprintf(stderr, "cannot handle %s internally", cmd);
482 482 goto out;
483 483 }
484   -
  484 +#ifdef HAVE_LIBAUDIT_SUPPORT
  485 + if (!prefixcmp(cmd, "trace")) {
  486 + set_buildid_dir();
  487 + setup_path();
  488 + argv[0] = "trace";
  489 + return cmd_trace(argc, argv, NULL);
  490 + }
  491 +#endif
485 492 /* Look for flags.. */
486 493 argv++;
487 494 argc--;