coresight: perf: Don't set the truncated flag in snapshot mode

Browse source

This patch avoids setting the truncated flag when operating in snapshot
mode since the trace buffer is expected to be truncated and discontinuous
from one snapshot to another.  Moreover when the truncated flag is set
the perf core stops enabling the event, waiting for user space to consume
the data.  In snapshot mode this is clearly not what we want since it
results in stale data.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Mathieu Poirier 2019-06-19 11:29:09 -06:00 • committed by Greg Kroah-Hartman

parent 99f81eb9c5

commit 5aafd9bf7a

3 changed files with 21 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

drivers/hwtracing/coresight/coresight-etb10.c

View file

8

drivers/hwtracing/coresight/coresight-tmc-etf.c

View file

8

drivers/hwtracing/coresight/coresight-tmc-etr.c

View file