linux-toradex.git/tools/perf/util/util.c, branch v4.4.7

perf tools: Make fetch_kernel_version() publicly available

2015-11-06T18:57:18+00:00

There are 2 places in llvm-utils.c which find kernel version information
through uname. This patch extracts the uname related code into a
fetch_kernel_version() function and puts it into util.h so it can be
reused.

Signed-off-by: Wang Nan 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Zefan Li 
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1446818135-87310-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Defaults to 'caller' callchain order only if --children is enabled

2015-10-22T18:40:11+00:00

The caller callchain order is useful with --children option since it can
show 'overview' style output, but other commands which don't use
--children feature like 'perf script' or even 'perf report/top' without
--children are better to keep callee order.

Signed-off-by: Namhyung Kim 
Acked-by: Brendan Gregg 
Acked-by: Frederic Weisbecker 
Acked-by: Ingo Molnar 
Cc: Adrian Hunter 
Cc: Borislav Petkov 
Cc: Chandler Carruth 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1445499946-29817-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf callchain: Switch default to 'graph,0.5,caller'

2015-10-05T20:59:43+00:00

Which is the most common default found in other similar tools.

Requested-by: Ingo Molnar 
Cc: Adrian Hunter 
Cc: Borislav Petkov 
Cc: Chandler Carruth 
Cc: David Ahern 
Cc: Frederic Weisbecker 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Stephane Eranian 
Cc: Wang Nan 
Link: https://www.youtube.com/watch?v=nXaxk27zwlk
Link: http://lkml.kernel.org/n/tip-v8lq36aispvdwgxdmt9p9jd9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

Merge branch 'perf/urgent' into perf/core, to pick up fixes before applying new changes

2015-09-18T07:24:01+00:00

Signed-off-by: Ingo Molnar

perf tools: Bool functions shouldn't return -1

2015-09-17T18:31:52+00:00

Returning a negative value for a boolean function seem to have the
undesired effect of returning true. Replace -1 by false in a
bool-returning function.

The diff of the .s file before and after the change (for x86_64):

  3907c3907
  < 	movl	$1, %ebx
  ---
  > 	xorl	%ebx, %ebx

while if -1 is replaced by true, the diff is empty.

This issue was found by the following Coccinelle semantic patch:

  
  @@
  identifier f;
  constant C;
  typedef bool;
  @@
  bool f (...){
  <+...
  * return -C;
  ...+>
  }
  

Signed-off-by: Peter Senna Tschudin 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Matt Fleming 
Cc: Milos Vyletel 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1442484533-19742-1-git-send-email-peter.senna@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib api fs: Move tracing_path interface into api/fs/tracing_path.c

2015-09-04T15:00:45+00:00

Moving tracing_path interface into api/fs/tracing_path.c out of util.c.
It seems generic enough to be used by others, and I couldn't think of
better place.

Signed-off-by: Jiri Olsa 
Reviewed-by: Matt Fleming 
Reviewed-by: Raphael Beamonte 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1441180605-24737-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move tracing_path stuff under same namespace

2015-09-02T19:30:47+00:00

Renaming all functions touching tracing_path under same namespace. New
interface is:

  char tracing_path[];
  - tracing mount path

  char tracing_events_path[];
  - tracing mount/events path

  void tracing_path_set(const char *mountpoint);
  - setting directly tracing_path(_events), used by --debugfs-dir option

  const char *tracing_path_mount(void);
  - initial setup of tracing_(events)_path, called from perf.c
    mounts debugfs/tracefs if needed and possible

  char *get_tracing_file(const char *name);
  void put_tracing_file(char *file);
  - get/put tracing file path

Signed-off-by: Jiri Olsa 
Cc: Raphael Beamonte 
Cc: David Ahern 
Cc: Matt Fleming 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1441180605-24737-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove mountpoint arg from perf_debugfs_mount

2015-09-02T19:30:47+00:00

It's not used by any caller. We either detect the mountpoint or use
hardcoded one.

Signed-off-by: Jiri Olsa 
Cc: Raphael Beamonte 
Cc: David Ahern 
Cc: Matt Fleming 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1441180605-24737-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

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: Add tracing_path and remove unneeded functions

2015-08-28T17:53:51+00:00

There's no need for find_tracing_dir, because perf already searches for
debugfs/tracefs mount on start and populate tracing_events_path.

Adding tracing_path to carry tracing dir string to be used in
get_tracing_file instead of calling find_tracing_dir.

Signed-off-by: Jiri Olsa 
Cc: Raphael Beamonte 
Cc: David Ahern 
Cc: Matt Fleming 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1440596813-12844-3-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo