linux-stable.git/tools/perf/perf.c, branch linux-4.3.y

perf tools: Do not change lib/api/fs/debugfs directly

2015-08-28T17:53:53+00:00

The tracing_events_path is the variable we want to change via
--debugfs-dir option, not the debugfs_mountpoint.

Signed-off-by: Jiri Olsa 
Reviewed-by: Matt Fleming 
Cc: Raphael Beamonte 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1440596813-12844-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix the bash completion problem of 'perf --*'

2015-02-27T18:52:28+00:00

The perf-completion.sh uses a predefined string '--help --version
--exec-path --html-path --paginate --no-pager --perf-dir --work-tree
--debugfs-dir' for the bash completion of 'perf --*', which has two
problems:

 Problem 1: If the options of perf are changed (see handle_options() in
 perf.c), the perf-completion.sh has to be changed at the same time. If
 not, the bash completion of 'perf --*' and the options which perf
 really supports will be inconsistent.

 Problem 2: When typing another single character after 'perf --', e.g.
 'h', and hit TAB key to get the bash completion of 'perf --h', the
 character 'h' disappears at once. This is not what we want, we wish the
 bash completion can return '--help --html-path' and then we can
 continue to choose one.

 To solve this problem, we add '--list-opts' to perf, which now supports
 'perf --list-opts' directly, and its result can be used in bash
 completion now.

Example:

 Before this patch:

 $ perf --h                 <-- hit TAB key after character 'h'
 $ perf --                  <-- 'h' disappears and no required result

 After this patch:

 $ perf --h                 <-- hit TAB key after character 'h'
 --help       --html-path   <-- the required result

Signed-off-by: Yunlong Song 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Ingo Molnar 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1425032491-20224-8-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo

perf list: Avoid confusion of perf output and the next command prompt

2015-02-27T18:52:09+00:00

Distinguish the output of 'perf list --list-opts' or 'perf --list-cmds'
with the next command prompt, which also happens in other cases (e.g.
record, report ...).

Example:

Before this patch:

 $perf list --list-opts
 --raw-dump $          <-- the output and the next command prompt are at
                           the same line

After this patch:

 $perf list --list-opts
 --raw-dump
 $                     <-- the new line

Signed-off-by: Yunlong Song 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1425032491-20224-6-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add new 'perf data' command

2015-02-25T15:42:25+00:00

Adding new 'perf data' command to provide operations over data files.

The 'perf data convert' sub command is coming in following patch, but
there's possibility for other useful commands like 'perf data ls' (to
display perf data file in directory in ls style).

Signed-off-by: Jiri Olsa 
Acked-by: Namhyung Kim 
Reviewed-by: David Ahern 
Cc: Frederic Weisbecker 
Cc: Jeremie Galarneau 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Sebastian Andrzej Siewior 
Cc: Tom Zanussi 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1424470628-5969-3-git-send-email-jolsa@kernel.org
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add --buildid-dir option to set cache directory

2014-12-09T12:14:35+00:00

Adding --buildid-dir to be able to set specific cache directory. It's
going to be handy for buildid tests coming in shortly.

Signed-off-by: Jiri Olsa 
Cc: Corey Ashford 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1417460789-13874-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf: Use strerror_r instead of strerror

2014-08-15T13:54:29+00:00

Use strerror_r instead of strerror in error messages for thread-safety.
This also introduce STRERR_BUFSIZE macro for the default size of message
buffer for strerror_r.

Signed-off-by: Masami Hiramatsu 
Cc: Ingo Molnar 
Cc: Namhyung Kim 
Cc: Naohiro Aota 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20140814022232.3545.14026.stgit@kbuild-fedora.novalocal
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix perf usage string leftover

2014-07-28T13:58:13+00:00

Fixing perf usage string leftover pointed out by Namhyung.

Reported-by: Namhyung Kim 
Cc: Arnaldo Carvalho de Melo 
Cc: Corey Ashford 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/n/tip-vkcf53oultknsh3ue9fhin94@git.kernel.org
Signed-off-by: Jiri Olsa

perf tools: Add --debug optionto set debug variable

2014-07-17T15:58:59+00:00

Adding --debug option as a way to setup debug variables.  Starting with
support for verbose, more will come.

It's possible to use it now with report command:
  $ perf --debug verbose   ...
  $ perf --debug verbose=2 ...

I'll need this support to add separated debug variable for ordered
events change in order to separate debug output out of standard verbose
stream.

Signed-off-by: Jiri Olsa 
Cc: Corey Ashford 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20140717105500.GG516@krava.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add support to dynamically get cacheline size

2014-06-09T11:34:48+00:00

Different arches may have different cacheline sizes.  Look it up and set
a global variable for reference.

Signed-off-by: Don Zickus 
Link: http://lkml.kernel.org/r/1401480605-97442-1-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa

perf trace: Warn the user when not available

2014-06-03T19:34:00+00:00

When the audit-libs devel package is not found at build time we disable
the 'trace' command, as we are not able to map syscall numbers to
strings, but then the message the user is presented is cryptic:

  [root@zoo linux]# trace ls
  perf: 'ls' is not a perf-command. See 'perf --help'.

Fix it by presenting a more helpful message:

  [root@zoo linux]# trace l
  trace command not available: missing audit-libs devel package at build time.

Signed-off-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Don Zickus 
Cc: Frederic Weisbecker 
Cc: Mike Galbraith 
Cc: Namhyung Kim 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/n/tip-uxeunqetd0sgxyibusapen9a@git.kernel.org
Signed-off-by: Jiri Olsa