linux-kernel - Re: [PATCH] Perf stat: Fix the ratio comments of miss-events

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Date:   Sat, 16 Nov 2019 06:45:19 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     lqqq341 <liuqi115@...ilicon.com>
Cc:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <mark.rutland@....com>, <alexander.shishkin@...ux.intel.com>,
        <jolsa@...hat.com>, <namhyung@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <linuxarm@...wei.com>, <john.garry@...wei.com>,
        <zhangshaokun@...ilicon.com>, <huangdaode@...ilicon.com>,
        <linyunsheng@...wei.com>
Subject: Re: [PATCH] Perf stat: Fix the ratio comments of miss-events

lqqq341 <liuqi115@...ilicon.com> writes:

> From: Qi Liu <liuqi115@...ilicon.com>
>
> Perf stat displays miss ratio of L1-dcache, L1-icache, dTLB cache,
> iTLB cache and LL-cache. Take L1-dcache for example, its miss ratio
> is caculated as "L1-dcache-load-misses/L1-dcache-loads". So "of all
> L1-dcache hits" is unsuitable to describe it, and "of all L1-dcache
> accesses" seems better. The comments of L1-icache, dTLB cache, iTLB
> cache and LL-cache are fixed in the same way.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>

-Andi