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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 876E0C2BA83 for ; Thu, 13 Feb 2020 09:15:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 56E8820848 for ; Thu, 13 Feb 2020 09:15:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="TsLZQpJt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729551AbgBMJPl (ORCPT ); Thu, 13 Feb 2020 04:15:41 -0500 Received: from mail-pg1-f196.google.com ([209.85.215.196]:44429 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729532AbgBMJPk (ORCPT ); Thu, 13 Feb 2020 04:15:40 -0500 Received: by mail-pg1-f196.google.com with SMTP id g3so2621308pgs.11 for ; Thu, 13 Feb 2020 01:15:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=6QR0i5D8maH05N1Xqm10UqPqza2GaWPuWHxOqQlujp4=; b=TsLZQpJtI8RTw9gJ4uw8zrgwAsCbYJEWmx1f5jjKeRlB1ZLy83x5nmAhOhunt6eKEk lzKkWQ9DyXgC4OQYqLecPVn9fV/DLPazYRNvb7XiIpOshO0Gd5ROys1KZP1ItmdQsuqR qljKgEg37AGeoXzLKs/0QZ+Vhr3Z3ytPUtcovIhlooZdDG/HUa226X18yYFgOOZPz12C ogBWqHls468Z93WnAWZEKInOyxCBixscxmIG7ecDQeLbd7vzVfCQomu233pcwASZ43zD mJzg/1GmlH7h9gwah5vobpBzpLYLQtv0MnnQ7YQfR5HMO/YUytWFZuqvasdbBtsmNRgo wNfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to:user-agent; bh=6QR0i5D8maH05N1Xqm10UqPqza2GaWPuWHxOqQlujp4=; b=B3bOqhF6krVFlddXkn4TptIEiIlLVqqIlpCmvwe7uNH5sB+oa6WPJJ+Oz9yvaTm7h7 UyBax525hjwICAY5r3CcLd00QObyFBwxHeCIm5ojrqT+TzGV4Wx+3DDUywbtu9AOb+IU mktZ1Q6ae+uSAWIRH+476Cklh/tNamJB+kE0EGXnD8YoaSMDE81Z+4ckBsqE2mZxFCZ3 KtclfIt0Iyx8nrCxG13g3qNEBMX7YwuqsuKNtHD10rLos26UoRc7irg4JeQcr7R/DPwa J4n0rgnT1vz2k9nD+y295IQt2hEqNV6q0206a12X21Qjm43MYf21n070ear2jj+YZvRH TKTQ== X-Gm-Message-State: APjAAAX5a+d6EqDYTDIt3tbwPh+a21b0pKN2dNQsdssGmKa4ro6Jy4Ba Dm8LnYIRbabPA2EtJvvRXStq8Q== X-Google-Smtp-Source: APXvYqx5l192f5XlrGi5tCGWrHTbHIJyvKe2MRQouAcBtdNVrgwr0A3OnycrxSu7YBo97Xj3auau0g== X-Received: by 2002:a62:7a8a:: with SMTP id v132mr13543263pfc.111.1581585340023; Thu, 13 Feb 2020 01:15:40 -0800 (PST) Received: from localhost ([122.167.210.63]) by smtp.gmail.com with ESMTPSA id 3sm2001563pjg.27.2020.02.13.01.15.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 13 Feb 2020 01:15:39 -0800 (PST) Date: Thu, 13 Feb 2020 14:45:36 +0530 From: Viresh Kumar To: Andy Tang Cc: "rjw@rjwysocki.net" , "linux-pm@vger.kernel.org" Subject: Re: [EXT] Re: Ask for help about cpufreq issue Message-ID: <20200213091536.bwxyuwjzga4uogeb@vireshk-i7> References: <20200207070544.geurecsy4i22xpzl@vireshk-i7> <20200211055315.qlqrxiqf72u36ijl@vireshk-i7> <20200211063439.aqc4h6np3wjpsg2j@vireshk-i7> <20200212115054.eouh7e42uqlcweo3@vireshk-i7> <20200213084819.jveurrsvtv72ssug@vireshk-i7> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: NeoMutt/20180716-391-311a52 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On 13-02-20, 09:12, Andy Tang wrote: > Hi Viresh, > > > -----Original Message----- > > From: Viresh Kumar > > Sent: 2020年2月13日 16:48 > > To: Andy Tang > > Cc: rjw@rjwysocki.net; linux-pm@vger.kernel.org > > Subject: Re: [EXT] Re: Ask for help about cpufreq issue > > > > I agree. Which means that there are some spikes of work getting scheduled > > on CPUs. The load will increase slowly and will also decrease slowly > > (step-by-step) with conservative governor. > > > > > So I can't understand why cpu frequency increased? > > > > Tracing or debugging cs_dbs_update() in conservative governor is the only > > way out I would suggest. > What's the *TRACING" here referring to? Could you please explain more about it? > I have no idea what it is. Sorry about that, I was talking about the in-kernel function tracer here. https://www.kernel.org/doc/Documentation/trace/ftrace.txt -- viresh