linux-kernel - Re: perf/x86/intel/uncore

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Date:   Fri, 25 Jan 2019 17:42:20 -0500
From:   "Liang, Kan" <kan.liang@...ux.intel.com>
To:     Song Liu <songliubraving@...com>
Cc:     lkml <linux-kernel@...r.kernel.org>
Subject: Re: perf/x86/intel/uncore



On 1/25/2019 5:24 PM, Song Liu wrote:
> I also noticed that uncore_pci_probe() returns at
> 
>          if (atomic_inc_return(&pmu->activeboxes) > 1)
>                  return 0;
> 
> for bus 1-7. So we only probed bus 0 (socket 0). Is this expected behavior?

We probed all, but only need to register PMU once.
It can be distinguished by cpumask. E.g. you may want to check 
"/sys/devices/uncore_imc_0/cpumask".


Thanks,
Kan