forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions
linux-uconsole/tools/perf/arch/arm/util
History
Mathieu Poirier 3662d8bca0 perf cs-etm: Properly set the value of 'old' and 'head' in snapshot mode 
[ Upstream commit e45c48a9a4 ]

This patch adds the necessary intelligence to properly compute the value
of 'old' and 'head' when operating in snapshot mode.  That way we can
get the latest information in the AUX buffer and be compatible with the
generic AUX ring buffer mechanic.

Tester notes:

> Leo, have you had the chance to test/review this one? Suzuki?

Sure.  I applied this patch on the perf/core branch (with latest
commit 3e4fbf36c1e3 'perf augmented_raw_syscalls: Move reading
filename to the loop') and passed testing with below steps:

  # perf record -e cs_etm/@tmc_etr0/ -S -m,64 --per-thread ./sort &
  [1] 19097
  Bubble sorting array of 30000 elements

  # kill -USR2 19097
  # kill -USR2 19097
  # kill -USR2 19097
  [ perf record: Woken up 4 times to write data ]
  [ perf record: Captured and wrote 0.753 MB perf.data ]

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190605161633.12245-1-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-07-26 09:14:05 +02:00
..
auxtrace.c coresight: Move to SPDX identifier 2018-04-19 12:29:41 -03:00
Build perf tools: Add coresight etm PMU record capabilities 2016-09-22 12:19:40 -03:00
cs-etm.c perf cs-etm: Properly set the value of 'old' and 'head' in snapshot mode 2019-07-26 09:14:05 +02:00
cs-etm.h coresight: Move to SPDX identifier 2018-04-19 12:29:41 -03:00
dwarf-regs.c perf tools: Replace STR() calls with __stringify() 2017-04-19 13:01:47 -03:00
pmu.c coresight: Move to SPDX identifier 2018-04-19 12:29:41 -03:00
unwind-libdw.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unwind-libunwind.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00