Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH RFC 1/1] genirq: Make threaded handler use irq affinity
 for managed interrupt
To:     Marc Zyngier <maz@kernel.org>
Cc:     John Garry <john.garry@huawei.com>, Ming Lei <ming.lei@redhat.com>,
        tglx@linutronix.de, chenxiang66@hisilicon.com,
        bigeasy@linutronix.de, linux-kernel@vger.kernel.org, hare@suse.com,
        hch@lst.de, axboe@kernel.dk, bvanassche@acm.org,
        peterz@infradead.org, mingo@redhat.com
References: <1575642904-58295-1-git-send-email-john.garry@huawei.com>
 <1575642904-58295-2-git-send-email-john.garry@huawei.com>
 <20191207080335.GA6077@ming.t460p>
 <78a10958-fdc9-0576-0c39-6079b9749d39@huawei.com>
 <305198e5-f76f-ded4-946b-9cfade18f08c@suse.de>
 <c06752c858229854b37af3b47779b126@www.loen.fr>
From:   Hannes Reinecke <hare@suse.de>
Message-ID: <fd4192c6-351a-144f-9c31-d5a89c6fdedf@suse.de>
Date:   Mon, 9 Dec 2019 16:25:01 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.2.1
MIME-Version: 1.0
In-Reply-To: <c06752c858229854b37af3b47779b126@www.loen.fr>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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@suse.de                               +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer