From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF12BC43603 for ; Mon, 9 Dec 2019 15:25:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B5AB7207FF for ; Mon, 9 Dec 2019 15:25:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726841AbfLIPZF (ORCPT ); Mon, 9 Dec 2019 10:25:05 -0500 Received: from mx2.suse.de ([195.135.220.15]:35788 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726197AbfLIPZF (ORCPT ); Mon, 9 Dec 2019 10:25:05 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 6A07EB03E; Mon, 9 Dec 2019 15:25:03 +0000 (UTC) Subject: Re: [PATCH RFC 1/1] genirq: Make threaded handler use irq affinity for managed interrupt To: Marc Zyngier Cc: John Garry , Ming Lei , 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> From: Hannes Reinecke Message-ID: 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: 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 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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