linux-toradex.git/tools/perf/tests/openat-syscall.c, branch v4.10

tools: Introduce str_error_r()

2016-07-12T18:19:47+00:00

The tools so far have been using the strerror_r() GNU variant, that
returns a string, be it the buffer passed or something else.

But that, besides being tricky in cases where we expect that the
function using strerror_r() returns the error formatted in a provided
buffer (we have to check if it returned something else and copy that
instead), breaks the build on systems not using glibc, like Alpine
Linux, where musl libc is used.

So, introduce yet another wrapper, str_error_r(), that has the GNU
interface, but uses the portable XSI variant of strerror_r(), so that
users rest asured that the provided buffer is used and it is what is
returned.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-d4t42fnf48ytlk8rjxs822tf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tests: Pass the subtest index to each test routine

2015-11-19T16:19:15+00:00

Some tests have sub-tests we want to run, so allow passing this.

Wang tried to avoid having to touch all tests, but then, having the
test.func in an anonymous union makes the build fail on older compilers,
like the one in RHEL6, where:

  test a = {
	.func = foo,
  };

fails.

To fix it leave the func pointer in the main structure and pass the subtest
index to all tests, end result function is the same, but we have just one
function pointer, not two, with and without the subtest index as an argument.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-5genj0ficwdmelpoqlds0u4y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Silence tracepoint event failures

2015-10-19T17:57:49+00:00

Currently, when 'perf test' is run by a normal user, it'll fail to
access tracepoint events.  The output becomes somewhat messy because it
tries to be nice with long error messages and hints.

IMHO this is not needed for 'perf test' by default and AFAIK 'perf test'
uses pr_debug() rather than pr_err() for such messages so that one can
use -v option to see further details on failed testcases if needed.

Before:
  $ perf test
   1: vmlinux symtab matches kallsyms                          : FAILED!
   2: detect openat syscall event                              :Error:
  No permissions to read
  /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat
  Hint:	Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing'
  FAILED!
   3: detect openat syscall event on all cpus                  :Error:
  No permissions to read
  /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat
  Hint:	Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing'
  FAILED!
   ...

After:
  $ perf test
   1: vmlinux symtab matches kallsyms                          : FAILED!
   2: detect openat syscall event                              : FAILED!
   3: detect openat syscall event on all cpus                  : FAILED!
   ...

  $ perf test -v 2
   2: detect openat syscall event                              :
  --- start ---
  test child forked, pid 30575
  Error:	    No permissions to read
  /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat
  Hint:  Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing'

  test child finished with -1
  ---- end ----
  detect openat syscall event: FAILED!

Signed-off-by: Namhyung Kim 
Tested-by: Arnaldo Carvalho de Melo 
Acked-by: David Ahern 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1445268229-1601-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf evsel: Propagate error info from tp_format

2015-09-15T12:48:33+00:00

Propagate error info from tp_format via ERR_PTR to get it all the way
down to the parse-event.c tracepoint adding routines. Following
functions now return pointer with encoded error:

  - tp_format
  - trace_event__tp_format
  - perf_evsel__newtp_idx
  - perf_evsel__newtp

This affects several other places in perf, that cannot use pointer check
anymore, but must utilize the err.h interface, when getting error
information from above functions list.

Signed-off-by: Jiri Olsa 
Cc: David Ahern 
Cc: Matt Fleming 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Raphael Beamonte 
Link: http://lkml.kernel.org/r/1441615087-13886-5-git-send-email-jolsa@kernel.org
[ Add two missing ERR_PTR() and one IS_ERR() ]
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Switch to tracing_path interface on appropriate places

2015-09-14T15:50:16+00:00

Using tracing_path interface on several places, that more or less
copy the functionality of tracing_path interface.

Signed-off-by: Jiri Olsa 
Cc: David Ahern 
Cc: Matt Fleming 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Raphael Beamonte 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1441180605-24737-16-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib api fs: Replace debugfs/tracefs objects interface with fs.c

2015-09-14T15:50:15+00:00

Switching to the fs.c related filesystem framework.

Signed-off-by: Jiri Olsa 
Cc: David Ahern 
Cc: Matt Fleming 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Raphael Beamonte 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/r/1441180605-24737-14-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf stat: Make stats work over the thread dimension

2015-06-26T14:20:02+00:00

Now that we have space for thread dimension counts, let's store it.

Signed-off-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1435310967-14570-7-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf stat: Use xyarray for cpu evsel counts

2015-06-26T14:19:19+00:00

Switching single dimensional array of 'struct perf_counts_values'
with xyarray object, so we could store thread dimension counts.

Signed-off-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1435310967-14570-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf stat: Introduce perf_counts function

2015-06-26T14:11:26+00:00

Introducing perf_counts function, that returns
'struct perf_counts_values' pointer for given cpu.

Also moving perf_counts* structures into stat.h.

Signed-off-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1435310967-14570-5-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add reference counting for thread_map object

2015-06-25T18:15:50+00:00

Adding reference counting for thread_map object, so it could be easily
shared among other objects.

Using thread_map__put instead thread_map__delete and making
thread_map__delete static.

Signed-off-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/1435012588-9007-5-git-send-email-jolsa@kernel.org
[ Adjustments to move it ahead of the "comm" patches ]
Signed-off-by: Arnaldo Carvalho de Melo