linux-kernel - Re: [PATCH v3] lib: optimize cpumask_local

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Message-ID: <20191115133625.GD29990@dhcp22.suse.cz>
Date:   Fri, 15 Nov 2019 14:36:25 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Shaokun Zhang <zhangshaokun@...ilicon.com>
Cc:     linux-kernel@...r.kernel.org, yuqi jin <jinyuqi@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Paul Burton <paul.burton@...s.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Anshuman Khandual <anshuman.khandual@....com>,
        netdev@...r.kernel.org
Subject: Re: [PATCH v3] lib: optimize cpumask_local_spread()

On Fri 15-11-19 17:09:13, Shaokun Zhang wrote:
[...]
> Oh, my mistake, for the previous instance, I don't list all IRQs and
> just choose one IRQ from one NUMA node. You can see that the IRQ
> number is not consistent :-).
> IRQ from 345 to 368 will be bound to CPU cores which are in NUMA node2
> and each IRQ is corresponding to one core.
> 

This is quite confusing then. I would suggest providing all IRQ used for
the device with the specific node affinity to see the difference in the
setup.

-- 
Michal Hocko
SUSE Labs