linux-toradex.git/tools/perf/builtin-top.c, branch v5.1-rc1

perf pmu: Remove set_drv_config API

2019-02-06T13:00:39+00:00

CoreSight was the only client of the PMU's set_drv_config() API.  Now
that it is no longer needed by CoreSight remove it from the code base.

Signed-off-by: Mathieu Poirier 
Acked-by: Suzuki K Poulouse 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexei Starovoitov 
Cc: Greg Kroah-Hartman 
Cc: H. Peter Anvin 
Cc: Heiko Carstens 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Martin Schwidefsky 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Will Deacon 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Link: http://lkml.kernel.org/r/20190131184714.20388-8-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo

pref tools: Add missing map.h includes

2019-02-06T13:00:38+00:00

Lots of places get the map.h file indirectly, and since we're going to
remove it from machine.h, then those need to include it directly, do it
now, before we remove that dep.

Cc: Adrian Hunter 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lkml.kernel.org/n/tip-ob8jehdjda8h5jsrv9dqj9tf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf hist: Use cached rbtrees

2019-01-25T14:12:10+00:00

At the cost of an extra pointer, we can avoid the O(logN) cost of
finding the first element in the tree (smallest node), which is
something heavily required for histograms. Specifically, the following
are converted to rb_root_cached, and users accordingly:

hist::entries_in_array
hist::entries_in
hist::entries
hist::entries_collapsed
hist_entry::hroot_in
hist_entry::hroot_out

Signed-off-by: Davidlohr Bueso 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: http://lkml.kernel.org/r/20181206191819.30182-7-dave@stgolabs.net
[ Added some missing conversions to rb_first_cached() ]
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Synthesize BPF events for pre-existing loaded BPF programs

2019-01-21T20:38:56+00:00

So that we can resolve symbols and map names.

Cc: Alexei Starovoitov 
Cc: Daniel Borkmann 
Cc: David Ahern 
Cc: Peter Zijlstra 
Cc: Song Liu 
Cc: kernel-team@fb.com
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20190117161521.1341602-9-songliubraving@fb.com
Signed-off-by: Song Liu 
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Lift restriction on using callchains without "sym" in --sort

2019-01-08T16:28:13+00:00

This restriction is not present in 'perf report' and since 'perf top'
uses the same hists browser, remove it from it as well.

With this we create per event buckets with callchain trees, so that

  # perf top --sort dso -g --no-children

Bucketizes samples by DSO and below it shows the callchains leading to
functions in this DSO.

Try also:

  # perf top -e sched:*switch -g --no-children

To see the callchains leading to sched switches, pressing 'E' to expand
all one can quickly see the most common scheduler switches and what
leads to them, for instance, calls to IO, futexes, etc.

Acked-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Jiri Olsa 
Link: https://lkml.kernel.org/r/20190107140854.GA28965@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Move perf_top__reset_sample_counters() to after counts display

2018-12-17T17:58:47+00:00

Move the perf_top__reset_sample_counters() call to right after we
display the counters so we can see the updated numbers for longer.

Signed-off-by: Jiri Olsa 
Acked-by: David S. Miller 
Acked-by: Namhyung Kim 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: https://lkml.kernel.org/n/tip-o72pyiwt05f3p2juprwmz2jo@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Display slow reader warning when droping samples

2018-12-17T17:58:40+00:00

Currently we display the "Too slow to read ring buffer.." helpline only
in the slow reader thread. This patch triggers it also when the
processing thread drops samples, because it has the same reason, which
is too many data on input.

Signed-off-by: Jiri Olsa 
Acked-by: David S. Miller 
Acked-by: Namhyung Kim 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: https://lkml.kernel.org/n/tip-bnev2mloavyurmgchcr3o24o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Save and display the drop count stats

2018-12-17T17:58:33+00:00

Add drop count to 'perf top' headers:

  # perf top --stdio
   PerfTop:    3549 irqs/sec  kernel:51.8%  exact: 100.0% lost: 0/0 drop: 0/0 [4000Hz cycles:ppp],  (all, 8 CPUs)

  # perf top
  Samples: 0  of event 'cycles:ppp', 4000 Hz, Event count (approx.): 0 lost: 0/0 drop: 0/0

The format is: /

Signed-off-by: Jiri Olsa 
Acked-by: David S. Miller 
Acked-by: Namhyung Kim 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/n/tip-2lj87zz8tq9ye1ntax3ulw0n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Drop samples which are behind the refresh rate

2018-12-17T17:58:26+00:00

Drop samples from processing thread if they get behind the latest event
read from the kernel maps. If it gets behind more than the refresh rate
(-d option), drop the sample.

Signed-off-by: Jiri Olsa 
Acked-by: David S. Miller 
Acked-by: Namhyung Kim 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: https://lkml.kernel.org/n/tip-x533ra5c1pgofvbtsizzuydd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf top: Set the 'session_done' volatile variable when exiting

2018-12-17T17:58:19+00:00

So we can get out of hist processing ASAP on user request.

Signed-off-by: Jiri Olsa 
Acked-by: David S. Miller 
Acked-by: Namhyung Kim 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: https://lkml.kernel.org/n/tip-r8aufbgbixr2f85s3wcoaw9v@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo