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Subject: Re: Perf framework : Cluster based counter support
To:     Mark Rutland <mark.rutland@arm.com>
Cc:     lkml <linux-kernel@vger.kernel.org>
References: <7ce0c077-06ef-676f-1f7b-61f3ba8589d1@codeaurora.org>
 <20190628165915.GB5143@lakrids.cambridge.arm.com>
From:   Mukesh Ojha <mojha@codeaurora.org>
Message-ID: <aca3b787-af8d-79fb-c23f-38accdd5d4e0@codeaurora.org>
Date:   Mon, 1 Jul 2019 21:09:33 +0530
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On 6/28/2019 10:29 PM, Mark Rutland wrote:
> On Fri, Jun 28, 2019 at 10:23:10PM +0530, Mukesh Ojha wrote:
>> Hi All,
> Hi Mukesh,
>
>> Is it looks considerable to add cluster based event support to add in
>> current perf event framework and later in userspace perf to support
>> such events ?
> Could you elaborate on what you mean by "cluster based event"?
>
> I assume you mean something like events for a cluster-affine shared
> resource like some level of cache?
>
> If so, there's a standard pattern for supporting such system/uncore
> PMUs, see drivers/perf/qcom_l2_pmu.c and friends for examples.


Thanks Mark for pointing it out.
Also What is stopping us in adding cluster based event e.g L2 cache 
hit/miss or some other type raw events  in core framework ?


Thanks.
Mukesh


>
> Thanks,
> Mark.