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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 3C53BC433E7 for ; Mon, 19 Oct 2020 16:01:52 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A20052053B for ; Mon, 19 Oct 2020 16:01:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="MiqhvzrQ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A20052053B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:In-reply-to:Subject:To: From:References:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ZyZk0fTGCxNvQFjTVXxZwjkisG9bBpW2iHjqNZogid8=; b=MiqhvzrQKwKdwfASYrg2pqfH4 x1hUNHf+odXQlUOOZKNx6E+zASJ0cMJ67CemiC1jLz6th3bcBavD/XSPmA+WE5GxxdwuvRgNjwYJ4 lJv0ibWII7VN0uyT1gS4rVlirid8hKNYG6ouDYRHZzAtqZ8swwmmeevQQhjZzTnb82epqSvLUGwES 9PEe4jS3dXGvCWEH1kYhTRe//IEafUZ72nfV0+r3uMA2vdbkLN3kEpcjlTNRIdv1fFcoYwWvtMtAj h5eqL7s3RhP4Tc63XthwLQZqWs1K5qCzr9l6C7n/u6CCzmQVPiEJ7XhvsnYvgi6lhA36aLdtnJR15 KKRuDVzpw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kUXa9-0007j1-VC; Mon, 19 Oct 2020 16:00:22 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kUXa5-0007h2-5e for linux-arm-kernel@lists.infradead.org; Mon, 19 Oct 2020 16:00:19 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 621CC1FB; Mon, 19 Oct 2020 09:00:13 -0700 (PDT) Received: from e113632-lin (e113632-lin.cambridge.arm.com [10.1.194.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7B8DC3F66B; Mon, 19 Oct 2020 09:00:11 -0700 (PDT) References: <20200901144324.1071694-1-maz@kernel.org> <20200901144324.1071694-4-maz@kernel.org> <353f13b0dcc6c7ea1b44012d9632a0cc@kernel.org> User-agent: mu4e 0.9.17; emacs 26.3 From: Valentin Schneider To: Vincent Guittot Subject: Re: [PATCH v3 03/16] arm64: Allow IPIs to be handled as normal interrupts In-reply-to: Date: Mon, 19 Oct 2020 17:00:09 +0100 Message-ID: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201019_120017_296463_97918B6C X-CRM114-Status: GOOD ( 14.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sumit Garg , Android Kernel Team , Florian Fainelli , Russell King , Jason Cooper , Saravana Kannan , Andrew Lunn , Marc Zyngier , Gregory Clement , linux-kernel , Catalin Marinas , Thomas Gleixner , Will Deacon , LAK Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 19/10/20 16:43, Vincent Guittot wrote: > On Mon, 19 Oct 2020 at 15:04, Marc Zyngier wrote: >> Since you are running perf, can you spot where the overhead occurs? > > hmm... Difficult to say because tracing the bench decreases a lot the > result. I have pasted the perf reports. > > I have only put symbol with overhead above 1% > > so _raw_spin_unlock_irq, schedule and __schedule seem the most > impacted but i can't get any conclusion > AFAICT on TX2 you should be able to run these and get some more details within IRQ-disabled regions: https://lore.kernel.org/linux-arm-kernel/20200924110706.254996-1-alexandru.elisei@arm.com/ (they should be on linux-next) > I can sent you perf.data files if you want > > >> >> Thanks, >> >> M. >> -- >> Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel