linux-kernel - Re: [PATCH] cpupower: fix TSC MHz calculation for Mperf monitor

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Message-ID: <db5b93c6-9cb3-497d-bc9d-4a7d309125b2@linux.alibaba.com>
Date: Mon, 2 Dec 2024 10:21:44 +0800
From: He Rongguang <herongguang@...ux.alibaba.com>
To: trenn@...e.com, shuah@...nel.org, jwyatt@...hat.com, jkacur@...hat.com,
 wyes.karny@....com
Cc: linux-kernel@...r.kernel.org, shannon.zhao@...ux.alibaba.com,
 linux-pm@...r.kernel.org
Subject: Re: [PATCH] cpupower: fix TSC MHz calculation for Mperf monitor

在 2024/11/28 17:50, He Rongguang 写道:
> Commit 'cpupower: Make TSC read per CPU for Mperf monitor' (c2adb1877b7)
> changes TSC counter reads to per cpu, but left time diff global (from
> start of all cpus to end of all cpus), thus diff(time) is too large for
> a cpu's tsc counting, resulting in far less than acutal TSC_Mhz and thus
> `cpupower monitor` showing far less than actual cpu realtime frequency.
> 
Ok, wyes.karny seems not in AMD anymore, Maintainers please review this
patch, thanks.

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