From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 122033 invoked by alias); 28 Aug 2016 13:35:06 -0000 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org Received: (qmail 122025 invoked by uid 89); 28 Aug 2016 13:35:05 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=H*i:sk:827bb8d, H*MI:sk:827bb8d, H*f:sk:827bb8d X-HELO: mail-wm0-f54.google.com Received: from mail-wm0-f54.google.com (HELO mail-wm0-f54.google.com) (74.125.82.54) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sun, 28 Aug 2016 13:34:55 +0000 Received: by mail-wm0-f54.google.com with SMTP id i5so54552128wmg.0 for ; Sun, 28 Aug 2016 06:34:54 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:cc:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-transfer-encoding; bh=OhP149UTJgd1CVpIm7jyfMrfSKGxNn5RnI9Ao8/WYsQ=; b=VonGzDgiZVvr43Tme/5/bGv9A1ZpemB8gnPH1n60onkQZ0xNJWp/21I6Svi/j6V9nL Fb/kGttdG6gvSLbkSu7BXdPRoC6SLrch2nrZfvnR9D8AwnZFgrXEFoI3VC6xOWwm1/Me zyyuNj+ecvhvya2elu0fnr2AkeWWbH/nuYifZJ5DQQ3vb/SerL0VchqEqnzQUmSeWhEa 3AjobPXLdHbNBuTSe6mI2KAW0EJvoQZOLyvVw46pHwVHk+8VJEe+0ELkSj2NIMiavlgf TeFMmI7dQZaBu0KNHydMOzrOumNXsyp+AZzxnf/Pa0G9CO0y4msjvLoJC/RyjsLO047p UgJA== X-Gm-Message-State: AE9vXwMmSy4nFHTB7u68EXMgMwYGMno2UnVfLXJtHaqE8Hb1HXdsyJZV5RBW2rYU72nJbQ== X-Received: by 10.194.161.70 with SMTP id xq6mr13338493wjb.189.1472391293046; Sun, 28 Aug 2016 06:34:53 -0700 (PDT) Received: from avi.cloudius-systems.com ([37.142.229.250]) by smtp.gmail.com with ESMTPSA id e5sm8599946wma.13.2016.08.28.06.34.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 28 Aug 2016 06:34:52 -0700 (PDT) Subject: Re: Some newbie questions To: David Smith , "Frank Ch. Eigler" References: <91592a2a-7373-6a27-413c-cf4aca70cb76@scylladb.com> <20160810164742.GF13748@redhat.com> <382185d7-86d6-45d0-1855-d7e3c1639083@scylladb.com> <42a5bad6-c094-cb7a-6f89-a592367ca30b@scylladb.com> <20160811161845.GC12190@redhat.com> <8af2d587-ebc0-730b-3b1c-a452c486af57@scylladb.com> <20160817183537.GB4647@redhat.com> <7a45c7b4-59b9-e0f8-77a5-d7ce3634fcfc@redhat.com> <0d91a649-873b-6d89-a5ef-ae88d11ce588@scylladb.com> <41e77cd5-5ecb-1076-d005-4a7fd454a450@redhat.com> <827bb8db-e8b2-a724-757a-76a4c494932e@scylladb.com> Cc: Mark Wielaard , systemtap@sourceware.org From: Avi Kivity Message-ID: <7ab6b476-5da3-e138-f016-329db0670a5f@scylladb.com> Date: Sun, 28 Aug 2016 13:35:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <827bb8db-e8b2-a724-757a-76a4c494932e@scylladb.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2016-q3/txt/msg00214.txt.bz2 On 08/28/2016 04:29 PM, Avi Kivity wrote: > > > I may be able to move the probe points to a less frequently accessed > point (at some loss in accuracy), so this patch ought to get me > started. Thanks a lot! > Alas, even with a light load I see delay_tsc jump to the #1 spot in the profile, so without a thread local variable, I can't use systemtap.