linux.git/tools/perf/util/header.c, branch v4.20

perf record: Encode -k clockid frequency into Perf trace

2018-10-18T14:16:38+00:00

Store -k clockid frequency into Perf trace to enable timestamps
derived metrics conversion into wall clock time on reporting stage.

Below is the example of perf report output:

  tools/perf/perf record -k raw -- ../../matrix/linux/matrix.gcc
  ...
  [ perf record: Captured and wrote 31.222 MB perf.data (818054 samples) ]

  tools/perf/perf report --header
  # ========
  ...
  # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1, use_clockid = 1, clockid = 4
  ...
  # clockid frequency: 1000 MHz
  ...
  # ========

Signed-off-by: Alexey Budankov 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/23a4a1dc-b160-85a0-347d-40a2ed6d007b@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename struct event_format to struct tep_event_format

2018-09-19T20:11:50+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_". This renames struct event_format
to struct tep_event_format

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Tzvetomir Stoyanov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180919185722.495820809@goodmis.org
Signed-off-by: Steven Rostedt (VMware) 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove perf_tool from event_op2

2018-09-19T13:25:10+00:00

Now that we keep a perf_tool pointer inside perf_session, there's no
need to have a perf_tool argument in the event_op2 callback. Remove it.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Alexey Budankov 
Cc: Andi Kleen 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180913125450.21342-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Switch 'session' argument to 'evlist' in perf_event__synthesize_attrs()

2018-08-30T18:52:21+00:00

To be able to pass in other than session's evlist.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180830063252.23729-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename pevent find APIs

2018-08-13T18:21:51+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_find_any_field, pevent_find_common_field,
pevent_find_event, pevent_find_field

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180700.316995920@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

tools lib traceevent, perf tools: Rename struct pevent to struct tep_handle

2018-08-10T18:29:35+00:00

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
the struct pevent to struct tep_handle.

Signed-off-by: Tzvetomir Stoyanov (VMware) 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Yordan Karadzhov (VMware) 
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180659.706175783@goodmis.org
Signed-off-by: Steven Rostedt 
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Drop unneeded bitmap_zero() calls

2018-08-08T18:55:44+00:00

bitmap_zero() is called after bitmap_alloc() in perf code. But
bitmap_alloc() internally uses calloc() which guarantees that allocated
area is zeroed. So following bitmap_zero is unneeded. Drop it.

This happened because of confusing name for bitmap allocator. It
should has name bitmap_zalloc instead of bitmap_alloc.

This series:

  https://lkml.org/lkml/2018/6/18/841

introduces a new API for bitmap allocations in kernel, and functions
there are named correctly. Following patch propogates the API to tools,
and fixes naming issue.

Signed-off-by: Yury Norov 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: Andrew Morton 
Cc: Andriy Shevchenko 
Cc: David Ahern 
Cc: David Carrillo-Cisneros 
Cc: Dmitry Torokhov 
Cc: Jin Yao 
Cc: Jiri Olsa 
Cc: Kate Stewart 
Cc: Matthew Wilcox 
Cc: Mike Snitzer 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Philippe Ombredanne 
Link: http://lkml.kernel.org/r/20180623073502.16321-1-ynorov@caviumnetworks.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Synthesize GROUP_DESC feature in pipe mode

2018-07-24T17:53:20+00:00

Stephan reported, that pipe mode does not carry the group information
and thus the piped report won't display the grouped output for following
command:

  # perf record -e '{cycles,instructions,branches}' -a sleep 4 | perf report

It has no idea about the group setup, so it will display events
separately:

  # Overhead  Command          Shared Object             ...
  # ........  ...............  .......................
  #
       6.71%  swapper          [kernel.kallsyms]
       2.28%  offlineimap      libpython2.7.so.1.0
       0.78%  perf             [kernel.kallsyms]
  ...

Fix GROUP_DESC feature record to be synthesized in pipe mode, so the
report output is grouped if there are groups defined in record:

  #                 Overhead  Command          Shared    ...
  # ........................  ...............  .......
  #
       7.57%   0.16%   0.30%  swapper          [kernel
       1.87%   3.15%   2.46%  offlineimap      libpyth
       1.33%   0.00%   0.00%  perf             [kernel
  ...

Reported-by: Stephane Eranian 
Signed-off-by: Jiri Olsa 
Tested-by: Arnaldo Carvalho de Melo 
Tested-by: Stephane Eranian 
Cc: Alexander Shishkin 
Cc: David Ahern 
Cc: David Carrillo-Cisneros 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20180712135202.14774-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix crash caused by accessing feat_ops[HEADER_LAST_FEATURE]

2018-06-25T14:59:37+00:00

perf_event__process_feature() accesses feat_ops[HEADER_LAST_FEATURE]
which is not defined and thus perf is crashing. HEADER_LAST_FEATURE is
used as an end marker for the perf report but it's unused for perf
script/annotate. Ignore HEADER_LAST_FEATURE for perf script/annotate,
just like it is done in 'perf report'.

Before:
  # perf record -o - ls | perf script
  
  Segmentation fault (core dumped)
  #

After:
  # perf record -o - ls | perf script
  
  Segmentation fault (core dumped)
  ls 7031 4392.099856:  250000 cpu-clock:uhH:  7f5e0ce7cd60
  ls 7031 4392.100355:  250000 cpu-clock:uhH:  7f5e0c706ef7
  #

Signed-off-by: Ravi Bangoria 
Cc: Alexander Shishkin 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: David Carrillo-Cisneros 
Cc: Jin Yao 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Fixes: 57b5de463925 ("perf report: Support forced leader feature in pipe mode")
Link: http://lkml.kernel.org/r/20180625124220.6434-4-ravi.bangoria@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf record: Support s390 random socket_id assignment

2018-06-25T14:59:35+00:00

On s390 the socket identifier assigned to a CPU identifier is random and
(depending on the configuration of the LPAR) may be higher than the CPU
identifier. This is currently not supported.

Fix this by allowing arbitrary socket identifiers being assigned to
CPU id.

Output before:

  [root@p23lp27 perf]# ./perf report --header -I -v
  ...
  socket_id number is too big.You may need to upgrade the perf tool.
  Error:
  The perf.data file has no samples!
  # ========
  # captured on    : Tue May 29 09:29:57 2018
  # header version : 1
  ...
  # Core ID and Socket ID information is not available
  ...
  [root@p23lp27 perf]#

Output after:

  [root@p23lp27 perf]# ./perf report --header -I -v
  ...
  Error:
  The perf.data file has no samples!
  # ========
  # captured on    : Tue May 29 09:29:57 2018
  # header version : 1
  ...
  # CPU 0: Core ID 0, Socket ID 6
  # CPU 1: Core ID 1, Socket ID 3
  # CPU 2: Core ID -1, Socket ID -1
  ...
  [root@p23lp27 perf]#

Signed-off-by: Thomas Richter 
Reviewed-by: Hendrik Brueckner 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Link: http://lkml.kernel.org/r/20180611073153.15592-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo