Received: by 2002:a05:6a10:5bc5:0:0:0:0 with SMTP id os5csp705469pxb; Tue, 19 Oct 2021 11:11:44 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwp9GsTidpIE+qbrdhJLx4uuzXhSrYd3BIVrRO9b9+g1z6r74cFSZtf3LrcnmX8e2Ju3pNf X-Received: by 2002:a62:ed01:0:b0:44d:6aa6:30eb with SMTP id u1-20020a62ed01000000b0044d6aa630ebmr1353731pfh.53.1634667104758; Tue, 19 Oct 2021 11:11:44 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1634667104; cv=none; d=google.com; s=arc-20160816; b=qY1i3jBiISfm6x5E0tFJ2Jc9CjDzyz+TumQNGdEbwCuUcfbSR2TGWUoLtBS2HEGnoW gDYf9GKbylfA8BLQLUcVyAMEbDZS8cSxCVIoP8JIVb3pTDwlu5J01o5s5zminYOqhq/A Dj2mdQGKeK9gcKwbuyNJow3yIuk1hXaEB8uYMJ2qU3FjNHVqUvL1nMPKOTa6hPTMhhsO msOdat7NB4ey2wk+DJoTc0e5tJx7g8QJ5J+LA/7zHBNtFXDClkvFTeh0rFlCeiQv5p0O k/PigPDHFlyxy/ngz1dmhQARbLdNgP/MgUsTdJ4LVK2yG7rwYbH4ajqXKWfOkiEhTTiK VOAA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=aLFdw23PMzyFC9UZ2JrsvvGGiC5+v9P6WoYi23or7e4=; b=NZaPh4EsHgawEKlJ54Nsxe7P7QpUBr5/w1tFfGdzC8k9KWymOEDZ2JTk6wjG5N1a8L RWgnoFkbyOMKdhCZftulMlPGUhx16uxljzGU08vmizzj1l2cPbVtsnXfyLUPwH3ImpK9 TlsgojXys3mTUJ/Gb548HKRL4O3RFfqGpZ2baIWY9h9Gt7ebR3W90e5bcIV7yaYfXRgG 67eXFMGCnC6wlIrhNjrv4YiRziF0UpxAbrX9sf/CYLj7cntBNsGmetZXp2Oc9Ba9EUBo bXvVDSaPp7gWSk5LPbPHvD8s9F8eCIGqZGsKXcgF7PEV+ijNtVzz2bFeox5kTr2v3akA 1wEA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id s142si1525705pgs.28.2021.10.19.11.11.19; Tue, 19 Oct 2021 11:11:44 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234665AbhJSSMS (ORCPT + 99 others); Tue, 19 Oct 2021 14:12:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:42822 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232130AbhJSSMR (ORCPT ); Tue, 19 Oct 2021 14:12:17 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 58B9361057; Tue, 19 Oct 2021 18:10:04 +0000 (UTC) Date: Tue, 19 Oct 2021 14:10:02 -0400 From: Steven Rostedt To: "Zanussi, Tom" Cc: Yang Jihong , linux-kernel Subject: Re: [QUESTION] Performance deterioration caused by commit 85f726a35e504418 Message-ID: <20211019141002.386e7b6a@gandalf.local.home> In-Reply-To: References: <992d3b1c-70db-5cc7-8400-39caa5d502d5@huawei.com> <20211018093731.2dd5917f@gandalf.local.home> <19e4222c-c9ac-5c1a-0c3a-b8bfd3524ab7@huawei.com> <20211018225112.3f6bda99@gandalf.local.home> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 19 Oct 2021 12:30:28 -0500 "Zanussi, Tom" wrote: > So anyway, as far as the histograms go, I think optimizing the two > changes in 85f726a35e504418 while ignoring trailing garbage can be done > without affecting the histogram correctness. So, none of that is exported to user space? -- Steve