linux-kernel - Re: [PATCH RFC 1/1] genirq: Make threaded handler use irq affinity for managed interrupt

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Message-ID: <c06752c858229854b37af3b47779b126@www.loen.fr>
Date:   Mon, 09 Dec 2019 15:17:48 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Hannes Reinecke <hare@...e.de>
Cc:     John Garry <john.garry@...wei.com>, Ming Lei <ming.lei@...hat.com>,
        <tglx@...utronix.de>, <chenxiang66@...ilicon.com>,
        <bigeasy@...utronix.de>, <linux-kernel@...r.kernel.org>,
        <hare@...e.com>, <hch@....de>, <axboe@...nel.dk>,
        <bvanassche@....org>, <peterz@...radead.org>, <mingo@...hat.com>
Subject: Re: [PATCH RFC 1/1] genirq: Make threaded handler use irq affinity  for managed interrupt

On 2019-12-09 15:09, Hannes Reinecke wrote:

[slight digression]

> My idea here is slightly different: can't we leverage SMT?
> Most modern CPUs do SMT (I guess even ARM does it nowadays)
> (Yes, I know about spectre and things. We're talking performance here 
> :-)

I only know two of those: Cavium TX2 and ARM Neoverse-E1.
ARM SMT CPUs are the absolute minority (and I can't say I'm 
displeased).

         M,
-- 
Jazz is not dead. It just smells funny...