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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 4FDBBC4338F for ; Thu, 5 Aug 2021 15:05:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 31C226104F for ; Thu, 5 Aug 2021 15:05:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241031AbhHEPFa (ORCPT ); Thu, 5 Aug 2021 11:05:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230183AbhHEPF3 (ORCPT ); Thu, 5 Aug 2021 11:05:29 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26306C061765 for ; Thu, 5 Aug 2021 08:05:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=q2j4Uc/1JxFNLSIGvFFv05XtciGEifuPGPdbXEcTRNI=; b=Hwgh/orUdnj/c2Fz6VAsH+lIIO jIsFInIHRQ9bdjMwFZThcT56K8D1Pg0nGTgO2cTvZnbJcGW3h35V9pqibNAg9gExzJtO+2m5wjkLn udcywxb01LWgY+7Xhok24BQCAfjnhq6PZpYJ6+siiL9P+O6BDlYVx2J98f10IkDeS6RW9Y2HLdqj0 aMmWsMraxWNgQnfCkqsR2CkdKk+cOWQmG5JLmcLNKRFbipgf/wk2QPTh6esna9KfvdUE8zqbRyFAL O00e2KFQ2We/HWK+v9wO5SOCfBAPs8hIfyMAHwhOQTLtcHCPeVNLxLOk436RoBY+QFySY2P2z0A6E R4kaXilA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBeve-0065ZN-Bx; Thu, 05 Aug 2021 15:05:02 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 16E203001CD; Thu, 5 Aug 2021 17:05:01 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E82CC201DCD23; Thu, 5 Aug 2021 17:05:00 +0200 (CEST) Date: Thu, 5 Aug 2021 17:05:00 +0200 From: Peter Zijlstra To: Steven Rostedt Cc: Rahul Gopakumar , Valentin Schneider , Abdul Anshad Azeez , "linux-kernel@vger.kernel.org" , "mingo@redhat.com" , "juri.lelli@redhat.com" , "vincent.guittot@linaro.org" , Rajender M , Linus Torvalds Subject: Re: [Linux Kernel 5.13 GA] ESXi Performance regression Message-ID: References: <87a6m4kk4f.mognet@arm.com> <20210805105853.66425074@oasis.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210805105853.66425074@oasis.local.home> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 05, 2021 at 10:58:53AM -0400, Steven Rostedt wrote: > On Thu, 5 Aug 2021 14:33:52 +0000 > Rahul Gopakumar wrote: > > > In our testing, we use RHEL 8.1 distro. It looks like tuned daemon updates > > 15ms (per tuned virtual-guest profile) in /proc/sys/kernel/sched_wakeup_granularity_ns > > file during tuned's startup. > > > > Now tuned daemon is not able to update the value as the commit moves those > > files to debugs and thus sched_wakeup_granularity_ns file remains with the > > default value. > > Hmm, is this a user space breakage? All those files were under CONFIG_SCHED_DEBUG and a !DEBUG build would not have them to begin with.