From: Linu Cherian <linuc.decode@gmail.com>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org,
mathieu.poirier@linaro.org, lcherian@marvell.com,
mike.leach@linaro.org
Subject: Re: [PATCH v4 0/2] Make sysFS functional on topologies with per core sink
Date: Tue, 6 Oct 2020 18:51:54 +0530 [thread overview]
Message-ID: <20201006132154.GA79@BG-LT6221.marvell.com> (raw)
In-Reply-To: <2bd65f2d-5660-10b3-f51f-448221d78d3d@arm.com>
Hi Suzuki,
On Mon Oct 05, 2020 at 12:27:07PM +0100, Suzuki K Poulose wrote:
> Hi Linu,
>
> On 09/04/2020 03:41 AM, Linu Cherian wrote:
> >This patch series tries to fix the sysfs breakage on topologies
> >with per core sink.
> >
> >Changes since v3:
> >- References to coresight_get_enabled_sink in perf interface
> > has been removed and marked deprecated as a new patch.
> >- To avoid changes to coresight_find_sink for ease of maintenance,
> > search function specific to sysfs usage has been added.
> >- Sysfs being the only user for coresight_get_enabled sink,
> > reset option is removed as well.
>
> Have you tried running perf with --per-thread option ? I believe
> this will be impacted as well, as we choose a single sink at the
> moment and this may not be reachable from the other CPUs, where
> the event may be scheduled. Eventually loosing trace for the
> duration where the task is scheduled on a different CPU.
>
Our testing with perf was limited(using -C option)
and havent tried with --per-thread option.
> Please could you try this patch and see if helps ? I have lightly
> tested this on a fast model.
Sure, will get back on this.
--
Linu cherian
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next prev parent reply other threads:[~2020-10-06 13:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-04 2:41 [PATCH v4 0/2] Make sysFS functional on topologies with per core sink Linu Cherian
2020-09-04 2:41 ` [PATCH v4 1/2] coresight: etm: perf: Sink selection using sysfs is deprecated Linu Cherian
2020-09-04 2:41 ` [PATCH v4 2/2] coresight: Make sysFS functional on topologies with per core sink Linu Cherian
2020-09-14 19:36 ` Mathieu Poirier
2020-09-15 4:40 ` Linu Cherian
2020-10-05 11:27 ` [PATCH v4 0/2] " Suzuki K Poulose
2020-10-06 13:21 ` Linu Cherian [this message]
2020-10-06 16:12 ` Mathieu Poirier
2020-10-06 16:43 ` Suzuki K Poulose
2020-10-06 16:56 ` Mathieu Poirier
2020-10-26 4:33 ` Linu Cherian
2020-10-26 18:17 ` Suzuki K Poulose
2020-10-27 13:13 ` Linu Cherian
2020-11-07 5:43 ` Linu Cherian
2020-11-10 12:57 ` Linu Cherian
2020-11-10 14:57 ` Suzuki K Poulose
2020-11-12 8:57 ` Linu Cherian
2020-11-12 9:20 ` Suzuki K Poulose
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