From: Leo Yan <leo.yan@linaro.org>
To: German Gomez <german.gomez@arm.com>
Cc: coresight@lists.linaro.org, mathieu.poirier@linaro.org,
suzuki.poulose@arm.com, james.clark@arm.com,
mike.leach@linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] coresight: etm4x: Expose default timestamp source in sysfs
Date: Sat, 30 Apr 2022 00:28:21 +0800 [thread overview]
Message-ID: <20220429162821.GA653442@leoy-ThinkPad-X240s> (raw)
In-Reply-To: <20220429123100.268059-2-german.gomez@arm.com>
On Fri, Apr 29, 2022 at 01:30:59PM +0100, German Gomez wrote:
> Add a new sysfs interface in /sys/bus/coresight/devices/etm<N>/ts_source
> indicating the configured timestamp source when the ETM device driver
> was probed.
>
> The perf tool will use this information to detect if the trace data
> timestamp matches the kernel time, enabling correlation of CoreSight
> trace with perf events.
>
> Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: German Gomez <german.gomez@arm.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
WARNING: multiple messages have this Message-ID (diff)
From: Leo Yan <leo.yan@linaro.org>
To: German Gomez <german.gomez@arm.com>
Cc: coresight@lists.linaro.org, mathieu.poirier@linaro.org,
suzuki.poulose@arm.com, james.clark@arm.com,
mike.leach@linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] coresight: etm4x: Expose default timestamp source in sysfs
Date: Sat, 30 Apr 2022 00:28:21 +0800 [thread overview]
Message-ID: <20220429162821.GA653442@leoy-ThinkPad-X240s> (raw)
In-Reply-To: <20220429123100.268059-2-german.gomez@arm.com>
On Fri, Apr 29, 2022 at 01:30:59PM +0100, German Gomez wrote:
> Add a new sysfs interface in /sys/bus/coresight/devices/etm<N>/ts_source
> indicating the configured timestamp source when the ETM device driver
> was probed.
>
> The perf tool will use this information to detect if the trace data
> timestamp matches the kernel time, enabling correlation of CoreSight
> trace with perf events.
>
> Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: German Gomez <german.gomez@arm.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
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next prev parent reply other threads:[~2022-04-29 16:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-29 12:30 [PATCH 0/2] coresight: etm4x: Expose default timestamp source in sysfs German Gomez
2022-04-29 12:30 ` German Gomez
2022-04-29 12:30 ` [PATCH 1/2] " German Gomez
2022-04-29 12:30 ` German Gomez
2022-04-29 16:28 ` Leo Yan [this message]
2022-04-29 16:28 ` Leo Yan
2022-05-02 16:49 ` Mathieu Poirier
2022-05-02 16:49 ` Mathieu Poirier
2022-04-29 12:31 ` [PATCH 2/2] coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface German Gomez
2022-04-29 12:31 ` German Gomez
2022-05-02 16:45 ` Mathieu Poirier
2022-05-02 16:45 ` Mathieu Poirier
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