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From: "Jin, Yao" <yao.jin@linux.intel.com>
To: Andi Kleen <ak@linux.intel.com>,
	acme@kernel.org, jolsa@kernel.org, peterz@infradead.org,
	mingo@redhat.com, alexander.shishkin@linux.intel.com
Cc: Linux-kernel@vger.kernel.org, kan.liang@intel.com, yao.jin@intel.com
Subject: Re: [PATCH] perf list: Skip the invalid hybrid pmu
Date: Tue, 6 Jul 2021 10:27:53 +0800	[thread overview]
Message-ID: <f96534e5-4a5c-f6da-4574-16f64f291834@linux.intel.com> (raw)
In-Reply-To: <77380298-b3d5-d165-c8d4-a24b22d15b0c@linux.intel.com>

Hi Arnaldo, hi Jiri,

On 6/17/2021 12:37 AM, Andi Kleen wrote:
> 
> On 6/9/2021 10:16 PM, Jin Yao wrote:
>> On hybrid platform, such as Alderlake, if atom CPUs are offlined,
>> the kernel still exports the sysfs path '/sys/devices/cpu_atom/' for
>> 'cpu_atom' pmu but the file '/sys/devices/cpu_atom/cpus' is empty,
>> which indicates this is an invalid pmu.
> 
> 
> The patch looks good, but it would probably make sense to fix the kernel to avoid this too.
> 
> Of course the tools patch would still be needed for older kernels.
> 
> -Andi
> 
> 

Any comments for this patch?

Thanks
Jin Yao

  reply	other threads:[~2021-07-06  2:28 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10  5:16 Jin Yao
2021-06-16 16:37 ` Andi Kleen
2021-07-06  2:27   ` Jin, Yao [this message]
2021-07-06 19:58 ` Jiri Olsa
2021-07-07  7:24   ` Jin, Yao

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