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;
To:     Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH RFC 1/1] genirq: Make threaded handler use irq affinity  for managed interrupt
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8;
 format=flowed
Content-Transfer-Encoding: 7bit
Date:   Mon, 09 Dec 2019 15:17:48 +0000
From:   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>
In-Reply-To: <305198e5-f76f-ded4-946b-9cfade18f08c@suse.de>
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>
Message-ID: <c06752c858229854b37af3b47779b126@www.loen.fr>
User-Agent: Roundcube Webmail/0.7.2
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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...