linux.git/tools/perf/util/scripting-engines/trace-event-python.c, branch v4.17

perf script python: Add addr into perf sample dict

2018-05-30T18:39:31+00:00

ARM CoreSight auxtrace uses 'sample->addr' to record the target address
for branch instructions, so the data of 'sample->addr' is required for
tracing data analysis.

This commit collects data of 'sample->addr' into perf sample dict,
finally can be used for python script for parsing event.

Signed-off-by: Leo Yan 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: Jonathan Corbet 
Cc: Mathieu Poirier 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Robert Walker 
Cc: Tor Jeremiassen 
Cc: coresight@lists.linaro.org
Cc: kim.phillips@arm.co
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Link: http://lkml.kernel.org/r/1527497103-3593-3-git-send-email-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add Python 3 support

2018-02-19T15:28:23+00:00

Added Python 3 support while keeping Python 2.7 compatibility.

Committer notes:

This doesn't make it to auto detect python 3, one has to explicitely ask
it to build with python 3 devel files, here are the instructions
provided by Jaroslav:

 ---
  $ cp -a tools/perf tools/python3-perf
  $ make V=1 prefix=/usr -C tools/perf PYTHON=/usr/bin/python2 all
  $ make V=1 prefix=/usr -C tools/python3-perf PYTHON=/usr/bin/python3 all
  $ make V=1 prefix=/usr -C tools/python3-perf PYTHON=/usr/bin/python3 DESTDIR=%{buildroot} install-python_ext
  $ make V=1 prefix=/usr -C tools/perf PYTHON=/usr/bin/python2 DESTDIR=%{buildroot} install-python_ext
 ---

We need to make this automatic, just like the existing tests for checking if
the python2 devel files are in place, allowing the build with python3 if
available, fallbacking to python2 and then just disabling it if none are
available.

So, using the PYTHON variable to build it using O= we get:

Before this patch:

  $ rpm -q python3 python3-devel
  python3-3.6.4-7.fc27.x86_64
  python3-devel-3.6.4-7.fc27.x86_64
  $ rm -rf /tmp/build/perf/ ; mkdir -p /tmp/build/perf ; make O=/tmp/build/perf PYTHON=/usr/bin/python3 -C tools/perf install-bin
  make: Entering directory '/home/acme/git/linux/tools/perf'
  
  Makefile.config:670: Python 3 is not yet supported; please set
  Makefile.config:671: PYTHON and/or PYTHON_CONFIG appropriately.
  Makefile.config:672: If you also have Python 2 installed, then
  Makefile.config:673: try something like:
  Makefile.config:674:
  Makefile.config:675:   make PYTHON=python2
  Makefile.config:676:
  Makefile.config:677: Otherwise, disable Python support entirely:
  Makefile.config:678:
  Makefile.config:679:   make NO_LIBPYTHON=1
  Makefile.config:680:
  Makefile.config:681: *** .  Stop.
  make[1]: *** [Makefile.perf:212: sub-make] Error 2
  make: *** [Makefile:110: install-bin] Error 2
  make: Leaving directory '/home/acme/git/linux/tools/perf'
  $

After:

  $ make O=/tmp/build/perf PYTHON=python3 -C tools/perf install-bin
  $ ldd ~/bin/perf | grep python
	libpython3.6m.so.1.0 => /lib64/libpython3.6m.so.1.0 (0x00007f58a31e8000)
  $ rpm -qf /lib64/libpython3.6m.so.1.0
  python3-libs-3.6.4-7.fc27.x86_64
  $

Now verify that when using the binding the right ELF file is loaded,
using perf trace:

  $ perf trace -e open* perf test python
     0.051 ( 0.016 ms): perf/3927 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC           ) = 3

  18: 'import perf' in python                               :
     8.849 ( 0.013 ms): sh/3929 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC           ) = 3

    25.572 ( 0.008 ms): python3/3931 openat(dfd: CWD, filename: /tmp/build/perf/python/perf.cpython-36m-x86_64-linux-gnu.so, flags: CLOEXEC) = 3

 Ok

  $

And using tools/perf/python/twatch.py, to show PERF_RECORD_ metaevents:

  $ python3 tools/perf/python/twatch.py
  cpu: 3, pid: 16060, tid: 16060 { type: fork, pid: 5207, ppid: 16060, tid: 5207, ptid: 16060, time: 10798513015459}
  cpu: 3, pid: 16060, tid: 16060 { type: fork, pid: 5208, ppid: 16060, tid: 5208, ptid: 16060, time: 10798513562503}
  cpu: 0, pid: 5208, tid: 5208 { type: comm, pid: 5208, tid: 5208, comm: grep }
  cpu: 2, pid: 5207, tid: 5207 { type: comm, pid: 5207, tid: 5207, comm: ps }
  cpu: 2, pid: 5207, tid: 5207 { type: exit, pid: 5207, ppid: 5207, tid: 5207, ptid: 5207, time: 10798551337484}
  cpu: 3, pid: 5208, tid: 5208 { type: exit, pid: 5208, ppid: 5208, tid: 5208, ptid: 5208, time: 10798551292153}
  cpu: 3, pid: 601, tid: 601 { type: fork, pid: 5209, ppid: 601, tid: 5209, ptid: 601, time: 10801779977324}
  ^CTraceback (most recent call last):
    File "tools/perf/python/twatch.py", line 68, in 
      main()
    File "tools/perf/python/twatch.py", line 40, in main
      evlist.poll(timeout = -1)
  KeyboardInterrupt
  $

  # ps ax|grep twatch
 5197 pts/8    S+     0:00 python3 tools/perf/python/twatch.py
  # ls -la /proc/5197/smaps
  -r--r--r--. 1 acme acme 0 Feb 19 13:14 /proc/5197/smaps
  # grep python /proc/5197/smaps
  558111307000-558111309000 r-xp 00000000 fd:00 3151710  /usr/bin/python3.6
  558111508000-558111509000 r--p 00001000 fd:00 3151710  /usr/bin/python3.6
  558111509000-55811150a000 rw-p 00002000 fd:00 3151710  /usr/bin/python3.6
  7ffad6fc1000-7ffad7008000 r-xp 00000000 00:2d 220196   /tmp/build/perf/python/perf.cpython-36m-x86_64-linux-gnu.so
  7ffad7008000-7ffad7207000 ---p 00047000 00:2d 220196   /tmp/build/perf/python/perf.cpython-36m-x86_64-linux-gnu.so
  7ffad7207000-7ffad7208000 r--p 00046000 00:2d 220196   /tmp/build/perf/python/perf.cpython-36m-x86_64-linux-gnu.so
  7ffad7208000-7ffad7215000 rw-p 00047000 00:2d 220196   /tmp/build/perf/python/perf.cpython-36m-x86_64-linux-gnu.so
  7ffadea77000-7ffaded3d000 r-xp 00000000 fd:00 3151795  /usr/lib64/libpython3.6m.so.1.0
  7ffaded3d000-7ffadef3c000 ---p 002c6000 fd:00 3151795  /usr/lib64/libpython3.6m.so.1.0
  7ffadef3c000-7ffadef42000 r--p 002c5000 fd:00 3151795  /usr/lib64/libpython3.6m.so.1.0
  7ffadef42000-7ffadefa5000 rw-p 002cb000 fd:00 3151795  /usr/lib64/libpython3.6m.so.1.0
  #

And with this patch, but building normally, without specifying the
PYTHON=python3 part, which will make it use python2 if its devel files are
available, like in this test:

  $ make O=/tmp/build/perf -C tools/perf install-bin
  $ ldd ~/bin/perf | grep python
	libpython2.7.so.1.0 => /lib64/libpython2.7.so.1.0 (0x00007f6a44410000)
  $ ldd /tmp/build/perf/python_ext_build/lib/perf.so  | grep python
	libpython2.7.so.1.0 => /lib64/libpython2.7.so.1.0 (0x00007fed28a2c000)
  $

  [acme@jouet perf]$ tools/perf/python/twatch.py
  cpu: 0, pid: 2817, tid: 2817 { type: fork, pid: 2817, ppid: 2817, tid: 8910, ptid: 2817, time: 11126454335306}
  cpu: 0, pid: 2817, tid: 2817 { type: comm, pid: 2817, tid: 8910, comm: worker }
  $ ps ax | grep twatch.py
   8909 pts/8    S+     0:00 /usr/bin/python tools/perf/python/twatch.py
  $ grep python /proc/8909/smaps
  5579de658000-5579de659000 r-xp 00000000 fd:00 3156044  /usr/bin/python2.7
  5579de858000-5579de859000 r--p 00000000 fd:00 3156044  /usr/bin/python2.7
  5579de859000-5579de85a000 rw-p 00001000 fd:00 3156044  /usr/bin/python2.7
  7f0de01f7000-7f0de023e000 r-xp 00000000 00:2d 230695   /tmp/build/perf/python/perf.so
  7f0de023e000-7f0de043d000 ---p 00047000 00:2d 230695   /tmp/build/perf/python/perf.so
  7f0de043d000-7f0de043e000 r--p 00046000 00:2d 230695   /tmp/build/perf/python/perf.so
  7f0de043e000-7f0de044b000 rw-p 00047000 00:2d 230695   /tmp/build/perf/python/perf.so
  7f0de6f0f000-7f0de6f13000 r-xp 00000000 fd:00 134975   /usr/lib64/python2.7/lib-dynload/_localemodule.so
  7f0de6f13000-7f0de7113000 ---p 00004000 fd:00 134975   /usr/lib64/python2.7/lib-dynload/_localemodule.so
  7f0de7113000-7f0de7114000 r--p 00004000 fd:00 134975   /usr/lib64/python2.7/lib-dynload/_localemodule.so
  7f0de7114000-7f0de7115000 rw-p 00005000 fd:00 134975   /usr/lib64/python2.7/lib-dynload/_localemodule.so
  7f0de7e73000-7f0de8052000 r-xp 00000000 fd:00 3173292  /usr/lib64/libpython2.7.so.1.0
  7f0de8052000-7f0de8251000 ---p 001df000 fd:00 3173292  /usr/lib64/libpython2.7.so.1.0
  7f0de8251000-7f0de8255000 r--p 001de000 fd:00 3173292  /usr/lib64/libpython2.7.so.1.0
  7f0de8255000-7f0de8291000 rw-p 001e2000 fd:00 3173292  /usr/lib64/libpython2.7.so.1.0
  $

Signed-off-by: Jaroslav Škarvada 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
LPU-Reference: 20180119205641.24242-1-jskarvad@redhat.com
Link: https://lkml.kernel.org/n/tip-8d7dt9kqp83vsz25hagug8fu@git.kernel.org
[ Removed explicit check for python version, allowing it to really build with python3 ]
Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Add script to profile and resolve physical mem type

2018-01-12T14:06:57+00:00

There could be different types of memory in the system. E.g normal
System Memory, Persistent Memory. To understand how the workload maps to
those memories, it's important to know the I/O statistics of them.  Perf
can collect physical addresses, but those are raw data.  It still needs
extra work to resolve the physical addresses.  Provide a script to
facilitate the physical addresses resolving and I/O statistics.

Profile with MEM_INST_RETIRED.ALL_LOADS or MEM_UOPS_RETIRED.ALL_LOADS
event if any of them is available.

Look up the /proc/iomem and resolve the physical address.  Provide
memory type summary.

Here is an example output:

  # perf script report mem-phys-addr
  Event: mem_inst_retired.all_loads:P
  Memory type                                    count   percentage
  ----------------------------------------  -----------  -----------
  System RAM                                        74        53.2%
  Persistent Memory                                 55        39.6%
  N/A

  ---

Changes since V2:
 - Apply the new license rules.
 - Add comments for globals

Changes since V1:
 - Do not mix DLA and Load Latency. Do not compare the loads and stores.
   Only profile the loads.
 - Use event name to replace the RAW event

Signed-off-by: Kan Liang 
Reviewed-by: Andi Kleen 
Cc: Dan Williams 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Cc: Philippe Ombredanne 
Cc: Stephane Eranian 
Link: https://lkml.kernel.org/r/1515099595-34770-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf perf: Remove duplicate includes

2017-12-27T15:15:49+00:00

These duplicate includes have been found with scripts/checkincludes.pl
but they have been removed manually to avoid removing false positives.

Signed-off-by: Pravin Shedge 
Cc: David S. Miller 
Cc: Greg Kroah-Hartman 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/1512582204-6493-1-git-send-email-pravin.shedge4linux@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Generate hooks with additional argument

2017-07-26T01:43:21+00:00

Modify the signature of tracepoint specific and trace_unhandled hooks to
add the perf_sample dict as a new argument.
Create a python helper function to print a dictionary.

Signed-off-by: Arun Kalyanasundaram 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Daniel Borkmann 
Cc: David Carrillo-Cisneros 
Cc: David S. Miller 
Cc: Peter Zijlstra 
Cc: Seongjae Park 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170721220422.63962-6-arunkaly@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Add perf_sample dict to tracepoint handlers

2017-07-26T01:43:20+00:00

The process_event python hook receives a dict with all perf_sample
entries, but the tracepoint specific and trace_unhandled hooks predate
the introduction of this dict, and do not receive it.

Add the aforementioned dict as an additional argument to the affected
handlers. To keep backwards compatibility (and avoid unnecessary work),
do not pass the dict if the number of arguments signals that handler
version predates this change.

Signed-off-by: Arun Kalyanasundaram 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Daniel Borkmann 
Cc: David Carrillo-Cisneros 
Cc: David S. Miller 
Cc: Peter Zijlstra 
Cc: Seongjae Park 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170721220422.63962-5-arunkaly@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Add sample_read to dict

2017-07-26T01:43:19+00:00

Provide time_enabled, time_running and counter value in the perf_sample
dict.

Signed-off-by: Arun Kalyanasundaram 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Daniel Borkmann 
Cc: David Carrillo-Cisneros 
Cc: David S. Miller 
Cc: Peter Zijlstra 
Cc: Seongjae Park 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170721220422.63962-4-arunkaly@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Refactor creation of perf sample dict

2017-07-26T01:43:19+00:00

Move the creation of the dict containing perf_sample entries into a
helper function to enable its reuse in other sample processing routines.

Signed-off-by: Arun Kalyanasundaram 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Daniel Borkmann 
Cc: David Carrillo-Cisneros 
Cc: David S. Miller 
Cc: Peter Zijlstra 
Cc: Seongjae Park 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170721220422.63962-3-arunkaly@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Allocate memory only if handler exists

2017-07-26T01:43:18+00:00

Avoid allocating memory if hook handler is not available. This saves
unused memory allocation and simplifies error path.

Let handler in python_process_tracepoint point to either tracepoint
specific or trace_unhandled hook. Use dict to check if handler points to
trace_unhandled.

Remove the exit label in python_process_general_event and return when no
handler is available.

Signed-off-by: Arun Kalyanasundaram 
Acked-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Daniel Borkmann 
Cc: David Carrillo-Cisneros 
Cc: David S. Miller 
Cc: Peter Zijlstra 
Cc: Seongjae Park 
Cc: Stephane Eranian 
Link: http://lkml.kernel.org/r/20170721220422.63962-2-arunkaly@google.com
Signed-off-by: Arnaldo Carvalho de Melo

tools: Adopt __noreturn from kernel sources

2017-06-19T18:14:58+00:00

To have a more compact way to specify that a function doesn't return,
instead of the open coded:

	__attribute__((noreturn))

And use it instead of the tools/perf/ specific variation, NORETURN.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-l0y144qzixcy5t4c6i7pdiqj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo