linux-kernel - Re: [PATCH 1/4] perf: Add new macros for mem

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Message-ID: <20211210082133.GP16608@worktop.programming.kicks-ass.net>
Date:   Fri, 10 Dec 2021 09:21:33 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kajol Jain <kjain@...ux.ibm.com>
Cc:     mpe@...erman.id.au, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, mingo@...hat.com, acme@...nel.org,
        jolsa@...nel.org, namhyung@...nel.org, ak@...ux.intel.com,
        linux-perf-users@...r.kernel.org, maddy@...ux.ibm.com,
        atrajeev@...ux.vnet.ibm.com, rnsastry@...ux.ibm.com,
        yao.jin@...ux.intel.com, ast@...nel.org, daniel@...earbox.net,
        songliubraving@...com, kan.liang@...ux.intel.com,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        paulus@...ba.org
Subject: Re: [PATCH 1/4] perf: Add new macros for mem_hops field

On Mon, Dec 06, 2021 at 02:47:46PM +0530, Kajol Jain wrote:
> Add new macros for mem_hops field which can be used to
> represent remote-node, socket and board level details.
> 
> Currently the code had macro for HOPS_0, which corresponds
> to data coming from another core but same node.
> Add new macros for HOPS_1 to HOPS_3 to represent
> remote-node, socket and board level data.
> 
> For ex: Encodings for mem_hops fields with L2 cache:
> 
> L2			- local L2
> L2 | REMOTE | HOPS_0	- remote core, same node L2
> L2 | REMOTE | HOPS_1	- remote node, same socket L2
> L2 | REMOTE | HOPS_2	- remote socket, same board L2
> L2 | REMOTE | HOPS_3	- remote board L2
> 
> Signed-off-by: Kajol Jain <kjain@...ux.ibm.com>

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>