linux-kernel - Re: 'perf top' broken on intel hybrid systems

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Message-ID: <877clnz4bh.fsf@vuxu.org>
Date:   Sat, 09 Dec 2023 18:14:10 +0100
From:   Leah Neukirchen <leah@...u.org>
To:     kan.liang@...ux.intel.com
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: Re: 'perf top' broken on intel hybrid systems


> The error is because the perf top always tries to open an event on the
> user_requested_cpus, which are all CPUs by default.
> 
> Something as below should fix it. For hybrid, open a PMU event on an
> unsupported CPU should be error out.
> 
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c

This fixes "perf top" on my i7-1355U.  It would be great if you could
get this patch into upstream and stable branches.

Thanks,
-- 
Leah Neukirchen  <leah@...u.org>  https://leahneukirchen.org/