linux.git/tools/perf, branch v4.9-rc2

perf jit: Fix build issue on Ubuntu

2016-10-17T14:25:34+00:00

When building on Ubuntu 16.04, I get the following error:

Makefile:49: *** the openjdk development package appears to me missing, install and try again.  Stop.

The problem is that update-java-alternatives has multiple spaces between
fields, and cut treats each space as a new delimiter:

java-1.8.0-openjdk-ppc64el     1081       /usr/lib/jvm/java-1.8.0-openjdk-ppc64el

Fix this by using awk, which handles this fine.

Signed-off-by: Anton Blanchard 
Reviewed-by: Stephane Eranian 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1476325243-15788-1-git-send-email-anton@ozlabs.org
Signed-off-by: Arnaldo Carvalho de Melo

perf jevents: Handle events including .c and .o

2016-10-17T14:24:18+00:00

This patch helps with Sukadev's vendor event tree where such events can happen.

>From Andi Kleen:
 Any event including a .c/.o/.bpf currently triggers BPF compilation or loading
 and then an error. This can happen for some Intel vendor events, which cannot
 be used.

This patch fixes this problem by forbidding BPF file patch containing '{', '}'
and ',', make sure flex consumes the leading '{', instead of matching it using
a BPF file path.

Tested result:

  $ perf stat -e '{unc_p_clockticks,unc_p_power_state_occupancy.cores_c0}' -a -I 1000
  invalid or unsupported event: '{unc_p_clockticks,unc_p_power_state_occupancy.cores_c0}'
  Run 'perf list' for a list of valid events
  (as expected, interperted as event)

  $ perf stat -e 'aaa.c' -a -I 1000
  ERROR: problems with path aaa.c: No such file or directory
  (as expected, interpreted as BPF source)

  $ perf stat -e 'aaa.ccc' -a -I 1000
  invalid or unsupported event: 'aaa.ccc'
  (as expected, interpreted as event)

  $ perf stat -e '{aaa.c}' -a -I 1000
  ERROR: problems with path aaa.c: No such file or directory
  event syntax error: '{aaa.c}'
  
  (as expected, interpreted as BPF source)

  $ perf stat -e '{cycles,aaa.c}' -a -I 1000
  ERROR: problems with path aaa.c: No such file or directory
  event syntax error: '{cycles,aaa.c}'
  (as expected, interpreted as BPF source)

Signed-off-by: Wang Nan 
Tested-by: Arnaldo Carvalho de Melo 
Reported-by: Andi Kleen 
Cc: Jiri Olsa 
Cc: Sukadev Bhattiprolu 
Cc: Zefan Li 
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1475900185-37967-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo

perf header: Set nr_numa_nodes only when we parsed all the data

2016-10-13T14:12:29+00:00

Sukadev reported segfault on releasing perf env's numa data.  It's due
to nr_numa_nodes being set no matter if the numa data gets parsed
properly. The perf_env__exit crash the on releasing non existed data.

Setting nr_numa_nodes only when data are parsed out properly.

Signed-off-by: Jiri Olsa 
Reported-by: Sukadev Bhattiprolu 
Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-dt9c0zgkt4hybn2cr4xiawta@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Fix refreshing hierarchy entries on TUI

2016-10-13T14:10:14+00:00

Markus reported that 'perf top --hierarchy' cannot scroll down after
refresh.  This was because the number of entries are not updated when
hierarchy is enabled.

Unlike normal report view, hierarchy mode needs to keep its own entry
count since it can have non-leaf entries which can expand/collapse.

Reported-and-Tested-by: Markus Trippelsdorf 
Signed-off-by: Namhyung Kim 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Fixes: f5b763feebe9 ("perf hists browser: Count number of hierarchy entries")
Link: http://lkml.kernel.org/r/20161007050412.3000-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top/report: Add tips about a list option

2016-10-05T22:51:53+00:00

Add two tips that describe --list option of config sub-command and
explain how to choose particular config file location.

Signed-off-by: Nambong Ha 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Taeung Song 
Link: http://lkml.kernel.org/r/1475191562-3240-1-git-send-email-over3025@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo

perf report/top: Add a tip about system-wide collection from all CPUs

2016-10-05T22:50:25+00:00

Signed-off-by: Donghyun Kim 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Taeung Song 
Link: http://lkml.kernel.org/r/1475187357-21882-1-git-send-email-dongdong9335@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo

perf report/top: Add a tip about source line numbers with overhead

2016-10-05T22:47:55+00:00

There is a existing tip as below.

    If you have debuginfo enabled, try: perf report -s sym,srcline

However this tip only describe a condition to use --sort sym,scrline
options.  So there is lack of explanation in the tip. I think that it
would be better to add a tip that exactly explains the feature of --sort
srcline.

Signed-off-by: Seonyoung Kim 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Taeung Song 
Link: http://lkml.kernel.org/r/1475194602-5596-1-git-send-email-adamas0414@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo

perf jevents: Fix Intel JSON fixed counter conversions

2016-10-05T21:41:06+00:00

Intel fixed counters are special cases in the JSON conversion process
because their decoding differs between perf and the event files.  Add
some missing entries in the conversion table.

Signed-off-by: Andi Kleen 
Cc: Jiri Olsa 
Cc: Sukadev Bhattiprolu 
Link: http://lkml.kernel.org/r/1475696832-9188-4-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Fix MTC timestamp calculation for large MTC periods

2016-10-05T11:15:58+00:00

The MTC packet provides a 8-bit slice of CTC which is related to TSC by
the TMA packet, however the TMA packet only provides the lower 16 bits
of CTC.  If mtc_shift > 8 then some of the MTC bits are not in the CTC
provided by the TMA packet. Fix-up the last_mtc calculated from the TMA
packet by copying the missing bits from the current MTC assuming the
least difference between the two, and that the current MTC comes after
last_mtc.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Cc: stable@vger.kernel.org # v4.3+
Link: http://lkml.kernel.org/r/1475062896-22274-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf intel-pt: Fix estimated timestamps for cycle-accurate mode

2016-10-05T11:15:29+00:00

In cycle-accurate mode, timestamps can be calculated from CYC packets.
The decoder also estimates timestamps based on the number of
instructions since the last timestamp. For that to work in
cycle-accurate mode, the instruction count needs to be reset to zero
when a timestamp is calculated from a CYC packet, but that wasn't
happening, so fix it.

Signed-off-by: Adrian Hunter 
Cc: Jiri Olsa 
Cc: stable@vger.kernel.org # v4.3+
Link: http://lkml.kernel.org/r/1475062896-22274-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo