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From: Daniel Kiss <daniel.kiss@arm.com>
To: mathieu.poirier@linaro.org, suzuki.poulose@arm.com,
	mike.leach@linaro.org, leo.yan@linaro.org,
	coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org
Cc: denik@google.com, Daniel Kiss <daniel.kiss@arm.com>
Subject: [PATCH 0/4] coresight: Add ETR-PERF polling.
Date: Wed, 21 Apr 2021 14:04:09 +0200	[thread overview]
Message-ID: <20210421120413.3110775-1-daniel.kiss@arm.com> (raw)

This series adds a feature to ETR-PERF that sync the ETR buffer to perf
periodically. This is really handy when the system wide trace is used
because in this case the perf won't sync during the trace. In a per-thread
setup the traced program might not go to the kernel frequvently enought
to collect trace. Polling helps in both usecases. Can be used with strobing.
Tuning polling period is challanging, I'm working on an additional patch
that adds some metrics to help tune the polling period.

Daniel Kiss (4):
  coresight: tmc-etr: Advance buffer pointer in sync buffer.
  coresight: tmc-etr: Track perf handler.
  coresight: etm-perf: Export etm_event_cpu_path.
  coresight: Add ETR-PERF polling.

 .../testing/sysfs-bus-coresight-devices-tmc   |   8 +
 drivers/hwtracing/coresight/Makefile          |   2 +-
 .../hwtracing/coresight/coresight-etm-perf.c  |  10 +-
 .../hwtracing/coresight/coresight-etm-perf.h  |   1 +
 .../coresight/coresight-etr-perf-polling.c    | 316 ++++++++++++++++++
 .../coresight/coresight-etr-perf-polling.h    |  42 +++
 .../hwtracing/coresight/coresight-tmc-core.c  |   2 +
 .../hwtracing/coresight/coresight-tmc-etr.c   |  22 +-
 drivers/hwtracing/coresight/coresight-tmc.h   |   2 +
 9 files changed, 401 insertions(+), 4 deletions(-)
 create mode 100644 drivers/hwtracing/coresight/coresight-etr-perf-polling.c
 create mode 100644 drivers/hwtracing/coresight/coresight-etr-perf-polling.h

-- 
2.25.1


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             reply	other threads:[~2021-04-21 12:07 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21 12:04 Daniel Kiss [this message]
2021-04-21 12:04 ` [PATCH 1/4] coresight: tmc-etr: Advance buffer pointer in sync buffer Daniel Kiss
2021-04-23  8:23   ` Leo Yan
2021-04-26 10:40   ` Suzuki K Poulose
2021-04-27  3:45     ` Leo Yan
2021-04-27 10:00       ` Suzuki K Poulose
2021-04-28  2:34         ` Leo Yan
2021-04-21 12:04 ` [PATCH 2/4] coresight: tmc-etr: Track perf handler Daniel Kiss
2021-04-23  9:20   ` Leo Yan
2021-04-26  0:25     ` Leo Yan
2021-04-21 12:04 ` [PATCH 3/4] coresight: etm-perf: Export etm_event_cpu_path Daniel Kiss
2021-04-21 12:04 ` [PATCH 4/4] coresight: Add ETR-PERF polling Daniel Kiss
2021-04-26  1:18   ` Leo Yan
2021-05-05  7:21   ` Denis Nikitin
2021-04-26 17:54 ` [PATCH 0/4] " Mathieu Poirier
2021-04-27 10:43   ` Al Grant
2021-04-27 14:41     ` Mike Leach
2021-04-27 15:47       ` Mathieu Poirier
2021-04-27 16:04         ` Leo Yan
2021-05-05  6:46           ` Denis Nikitin
2021-05-05 15:29             ` Mathieu Poirier
2021-05-14  9:02               ` Denis Nikitin
2021-05-14 16:16                 ` Mike Leach
2021-05-18 14:00                 ` Leo Yan
2021-05-18 14:14                   ` Leo Yan
2021-05-18 15:41                   ` Mathieu Poirier
2021-05-26  6:47                   ` Denis Nikitin
2021-05-23  8:45                 ` Leo Yan
2021-05-27  7:50                   ` Denis Nikitin
2021-05-27 15:07                     ` Leo Yan
2021-05-27 16:22                       ` Denis Nikitin
2021-05-28 16:37                         ` Leo Yan
2021-04-27 16:24 ` James Clark
2021-04-28 11:30   ` James Clark
2021-04-28 11:52   ` Daniel Kiss

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