linux-kernel - Re: [PATCH v8 2/5] perf tools: sync addition of PERF_MEM_SNOOPX

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Date:   Wed, 11 May 2022 10:20:04 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ali Saidi <alisaidi@...zon.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, german.gomez@....com,
        benh@...nel.crashing.org, Nick.Forrington@....com,
        alexander.shishkin@...ux.intel.com, andrew.kilroy@....com,
        james.clark@....com, john.garry@...wei.com, jolsa@...nel.org,
        kjain@...ux.ibm.com, lihuafei1@...wei.com, mark.rutland@....com,
        mathieu.poirier@...aro.org, mingo@...hat.com, namhyung@...nel.org,
        peterz@...radead.org, will@...nel.org
Subject: Re: [PATCH v8 2/5] perf tools: sync addition of PERF_MEM_SNOOPX_PEER

On Tue, May 10, 2022 at 01:28:38PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, May 04, 2022 at 06:48:47PM +0000, Ali Saidi escreveu:
> > Add a flag to the perf mem data struct to signal that a request caused a
> > cache-to-cache transfer of a line from a peer of the requestor and
> > wasn't sourced from a lower cache level.  The line being moved from one
> > peer cache to another has latency and performance implications. On Arm64
> > Neoverse systems the data source can indicate a cache-to-cache transfer
> > but not if the line is dirty or clean, so instead of overloading HITM
> > define a new flag that indicates this type of transfer.
> > 
> > Signed-off-by: Ali Saidi <alisaidi@...zon.com>
> > Reviewed-by: Leo Yan <leo.yan@...aro.org>
> 
> Was this already merged on the ARM kernel tree?

No, I don't think this patch has been merged on Arm kernel tree.  I searched
Arm and Arm64 git repos, none of them has merged this patch.

https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?qt=author&q=Ali+Saidi
http://git.armlinux.org.uk/cgit/linux-arm.git/log/?qt=author&q=Ali+Saidi

P.s. Ali missed to include German's review tag, see:
https://lore.kernel.org/lkml/458a2de1-dc93-7e2d-5dc5-fbcd670572b6@arm.com/

Do you want us to resend the patch set for adding tags?

Thanks,
Leo