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From: Leo Yan <leo.yan@linaro.org>
To: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: suzuki.poulose@arm.com, alexander.shishkin@linux.intel.com,
	coresight@lists.linaro.org, peterz@infradead.org,
	mike.leach@arm.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 00/16] coresight: Add support for CPU-wide trace scenarios
Date: Wed, 27 Mar 2019 15:52:51 +0800	[thread overview]
Message-ID: <20190327075251.GC13559@leoy-ThinkPad-X240s> (raw)
In-Reply-To: <20190325215632.17013-1-mathieu.poirier@linaro.org>

On Mon, Mar 25, 2019 at 03:56:16PM -0600, Mathieu Poirier wrote:
> This is the second revision of a patchset that adds support for CPU-wide
> trace scenarios and as such, it is now possible to issue the following
> commands:
> 
> 	# perf record -e cs_etm/@20070000.etr/ -C 2,3 $COMMAND
> 	# perf record -e cs_etm/@20070000.etr/ -a $COMMAND
> 
> The solution is designed to work for both 1:1 and N:1 source/sink
> topologies, though the former hasn't been tested for lack of access to HW.
> 
> Most of the changes revolve around allowing more than one event to use
> a sink when operated from perf.  More specifically the first event to
> use a sink switches it on while the last one is tasked to aggregate traces
> and switching off the device.
> 
> This is the kernel part of the solution, with the user space portion to be
> released in a later set.  All patches (user and kernel) have been rebased
> on v5.1-rc2 and are hosted here[1].  Everything has been tested on Juno and
> 410c dragonboard platforms.

FWIW, gave the testing on my Hikey620 board and these patches also work
well with below commands:

  # perf record -e cs_etm/@f6402000.etf/ -a uname
  # perf record -e cs_etm/@f6402000.etf/ -C 0,4 uname

  # perf record -e cs_etm/@f6404000.etr/ -a uname
  # perf record -e cs_etm/@f6404000.etr/ -C 1,2,7 uname

P.s. just note here and this is off topic to this patch set, the
'perf report' command took below time for decoding ~4MB CoreSight trace
data on my Hikey board, seems we can take a look for decoding speed
optimization later:

  # time perf report  --vmlinux /mnt/linux-kernel/linux-next/vmlinux
  real    2m11.153s
  user    1m47.979s
  sys     0m0.204s

Thanks,
Leo Yan

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  parent reply	other threads:[~2019-03-27  7:53 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-25 21:56 [PATCH v2 00/16] coresight: Add support for CPU-wide trace scenarios Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 01/16] coresight: pmu: Adding ITRACE property to cs_etm PMU Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 02/16] coresight: etm4x: Add kernel configuration for CONTEXTID Mathieu Poirier
2019-03-26 11:59   ` Suzuki K Poulose
2019-03-25 21:56 ` [PATCH v2 03/16] coresight: etm4x: Configure tracers to emit timestamps Mathieu Poirier
2019-03-26 11:53   ` Suzuki K Poulose
2019-03-25 21:56 ` [PATCH v2 04/16] coresight: Adding return code to sink::disable() operation Mathieu Poirier
2019-03-26 14:55   ` Suzuki K Poulose
2019-03-25 21:56 ` [PATCH v2 05/16] coresight: Move reference counting inside sink drivers Mathieu Poirier
2019-03-26 15:04   ` Suzuki K Poulose
2019-03-25 21:56 ` [PATCH v2 06/16] coresight: Properly address errors in sink::disable() functions Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 07/16] coresight: Properly address concurrency in sink::update() functions Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 08/16] coresight: perf: Clean up function etm_setup_aux() Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 09/16] coresight: perf: Refactor function free_event_data() Mathieu Poirier
2019-03-26 15:07   ` Suzuki K Poulose
2019-03-25 21:56 ` [PATCH v2 10/16] coresight: Communicate perf event to sink buffer allocation function Mathieu Poirier
2019-03-26 15:12   ` Suzuki K Poulose
2019-03-25 21:56 ` [PATCH v2 11/16] coresight: tmc-etr: Refactor function tmc_etr_setup_perf_buf() Mathieu Poirier
2019-03-26 15:29   ` Suzuki K Poulose
2019-03-26 16:29     ` Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 12/16] coresight: tmc-etr: Introduce the notion of process ID to ETR devices Mathieu Poirier
2019-03-26 16:46   ` Suzuki K Poulose
2019-03-26 18:06     ` Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 13/16] coresight: tmc-etr: Allow events to use the same ETR buffer Mathieu Poirier
2019-03-26 16:18   ` Suzuki K Poulose
2019-03-26 17:55     ` Mathieu Poirier
2019-03-27 11:32       ` Suzuki K Poulose
2019-03-27 17:01         ` Mathieu Poirier
2019-04-01 13:01           ` Suzuki K Poulose
2019-04-03  2:13             ` Mathieu Poirier
2019-03-30 15:43   ` Leo Yan
2019-04-01  7:29     ` Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 14/16] coresight: tmc-etr: Add support for CPU-wide trace scenarios Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 15/16] coresight: tmc-etf: " Mathieu Poirier
2019-03-25 21:56 ` [PATCH v2 16/16] coresight: etb10: " Mathieu Poirier
2019-03-27  7:52 ` Leo Yan [this message]
2019-03-27 14:40   ` [PATCH v2 00/16] coresight: " Mathieu Poirier
2019-03-27 14:44     ` Leo Yan
2019-04-11 18:52 ` Robert Walker
2019-04-16 19:37   ` Mathieu Poirier
2019-04-24 16:22     ` Robert Walker

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