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

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Message-ID: <fd4192c6-351a-144f-9c31-d5a89c6fdedf@suse.de>
Date:   Mon, 9 Dec 2019 16:25:01 +0100
From:   Hannes Reinecke <hare@...e.de>
To:     Marc Zyngier <maz@...nel.org>
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 12/9/19 4:17 PM, Marc Zyngier wrote:
> 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).
> 
Ach, too bad.

Still a nice idea, putting SMT finally to some use ...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke            Teamlead Storage & Networking
hare@...e.de                               +49 911 74053 688
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