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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 4239FC433B4 for ; Tue, 27 Apr 2021 11:42:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0980F611F2 for ; Tue, 27 Apr 2021 11:42:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235882AbhD0LnD (ORCPT ); Tue, 27 Apr 2021 07:43:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230365AbhD0Lm5 (ORCPT ); Tue, 27 Apr 2021 07:42:57 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 200A4C061574 for ; Tue, 27 Apr 2021 04:42:14 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1619523732; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to; bh=jSVDUyEHja1tbp9s9K8VqIiEVzIx/QRHGOyQtWiQYpg=; b=cGMbBB8IBQAdopstVtkxdq83Cnivv6vs5wp8kG9LuwsjccltBYvRkXAWE82W0BczCYZNHL tEQGb+oFDuQAQbxa8KKMp5oimDctBOr/9sU68pJQ2A6Kiz7TUY6kGL7kCuAZk/XnUK5YfK +lGdbW3klSL9/C4ErVFxEtRa2j0pYs5yI8KE9YDIUt450uJJwKkNBoHrjrB6uY8ODoZIck K7tKTBROeSeqLhAX94wgCNOG2K5+SOLlMScm1/pA1kK2OZKMoYm5ud8/W+JpfQaciw0Oue L7vWzPdNxQ93PuJLs/fYBSoFxDjF8e1UwcU9tuwweXE2URt/87EIxQdxmikGmA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1619523732; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to; bh=jSVDUyEHja1tbp9s9K8VqIiEVzIx/QRHGOyQtWiQYpg=; b=2Di9OTi/ZHJrJ8SpcamDhBzQAz1mMQvXqIPQaIEeph0BEwKLjShpfjUZZJrCj6WADeHJVV 1hniNMuacCUF0VBA== To: kernel test robot , Barry Song Cc: Ingo Molnar , LKML , lkp@lists.01.org, lkp@intel.com, ying.huang@intel.com, feng.tang@intel.com, zhengjun.xing@intel.com, x86@kernel.org Subject: Re: [genirq] cbe16f35be: will-it-scale.per_thread_ops -5.2% regression In-Reply-To: <20210427090013.GG32408@xsang-OptiPlex-9020> Date: Tue, 27 Apr 2021 13:42:12 +0200 Message-ID: <87fszcnecr.ffs@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Folks, On Tue, Apr 27 2021 at 17:00, kernel test robot wrote: > Greeting, > > FYI, we noticed a -5.2% regression of will-it-scale.per_thread_ops due to commit: > > commit: cbe16f35bee6880becca6f20d2ebf6b457148552 ("genirq: Add IRQF_NO_AUTOEN for request_irq/nmi()") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master this is the second report in the last week which makes not a lot of sense. And this oneis makes absolutely no sense at all. This commit affects request_irq() and the related variants and has exactly ZERO influence on anything related to that test case simply because. I seriously have to ask the question whether this test infrastructure is actually measuring what it claims to measure. As this commit clearly _cannot_ have the 'measured' side effect, this points to some serious issue in the tests or the test infrastructure itself. Thanks, tglx