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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C15FAC7EE2F for ; Thu, 2 Mar 2023 02:48:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3D8D06B0071; Wed, 1 Mar 2023 21:48:20 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3617B6B0073; Wed, 1 Mar 2023 21:48:20 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 202106B0074; Wed, 1 Mar 2023 21:48:20 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 0DD236B0071 for ; Wed, 1 Mar 2023 21:48:20 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id D5439A1099 for ; Thu, 2 Mar 2023 02:48:19 +0000 (UTC) X-FDA: 80522424318.12.FDD48B4 Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) by imf01.hostedemail.com (Postfix) with ESMTP id 00B194000C for ; Thu, 2 Mar 2023 02:48:17 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=mqEVhSLh; spf=pass (imf01.hostedemail.com: domain of bagasdotme@gmail.com designates 209.85.210.172 as permitted sender) smtp.mailfrom=bagasdotme@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1677725298; a=rsa-sha256; cv=none; b=zygSchnVjPWP1xhIQnLpTjeOoRAsaTnN0+uCvXxaabvf+9dWb+9dsxYX+w4EzTIQ0Y924f LqxWD4xGbIjin2JW609jpYyq5MydmV5wRDrNpa58bCiWSB8ZkCZzIFuAXxUmnqmd5rSRO+ h5BZu8S/KzNVMVtaaBauughT33OqLH8= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=mqEVhSLh; spf=pass (imf01.hostedemail.com: domain of bagasdotme@gmail.com designates 209.85.210.172 as permitted sender) smtp.mailfrom=bagasdotme@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1677725298; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=CyOJjljScA1IV8sLYQx4JYgQ0KEeCcbRmuPAm8zbNs0=; b=5TZeeuaCG6FeOGDsXO360PD6yaFZ4hJAtrO/82bUdni8huI3iLxps2zLZFWQWO2fCsSDEF hPPorH18YapvIGxXXeO529JtoRJgZu5jkAkFEqjM+knxP3sG4HpQfKgrOS6GuCP44PV9R3 /5lA0BgBWQNCzlhJ890D5fNpvAPgnJU= Received: by mail-pf1-f172.google.com with SMTP id u20so9235763pfm.7 for ; Wed, 01 Mar 2023 18:48:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1677725296; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=CyOJjljScA1IV8sLYQx4JYgQ0KEeCcbRmuPAm8zbNs0=; b=mqEVhSLhnIWUxSLG5tX+ddyDaOLKKTszF/OvzkWpp0mmPCBVwGSAZ03nEog087YXvK 8y6FRPNHQVQi/1MVYt6xZh0q5sg6+MMle8H+cvhkUBCzSvZ4W9EL2WcmCpbJ/EGiwtHW 2RuOiWxHNT3jUhP55yFCFzSg2n91EU1U3Z2BPZIOY2fLNAKay12PEMb951JwQasrVNyw I5yp7q8ohmPyZMD4DOhSffVKrj1YLrKu9GV/ae9xINgwN0lyJyps52J7X9dohThl60mc w8BPHcq7Tcb0E8i7IKMDIPULkASD/uRgPYWYrxbYPTgAXiEDLPWdDnnJgvI5eH4EQ24m rg5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1677725296; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=CyOJjljScA1IV8sLYQx4JYgQ0KEeCcbRmuPAm8zbNs0=; b=RFHbBBwgjyXecr+fLqMkqyT014GttaRYe/KMtDao6oW+knVOt1O5McsCYAEu9pw8ou LUTLfdVf02kTOV9Rgh5hVo8OQH/zm94JH1CnvzBJYTBpQkRh/4H1z4150z+ePrd+jtJ2 aTSKGo2HjDoYb6wzd8xwHaNXI1StSVug8TxaT1w8252x5AInERpDtke7cRnvfeO5BQpZ F6YTXpSE3nrmbQR7G3GvWj91D9SQYBk3fhuyoHLEIwr86qnTNyFA3R7mXIeCzGasQVM6 yq9uFziITtRSwaOXiQ67iyERPGYtCp7k5xw9X4WfKNo7Y5VgNq5pTLnVO4NcG+QfVycZ q7wQ== X-Gm-Message-State: AO0yUKWxpTCdRMJzKWA3g3q5/M0/+WzojKAXEUZN7DbLUud6eZXswAYL FsO7OjzRfLOpd87VazZ0WzTA+M2epLw= X-Google-Smtp-Source: AK7set+SCS9iuszLb29lf2dM6thcXWIzqM012j7t5hexSTRJVB9F7PoLom1itM2jWwAmZhOkIFBnQA== X-Received: by 2002:a62:6401:0:b0:577:272f:fdb with SMTP id y1-20020a626401000000b00577272f0fdbmr7021473pfb.29.1677725296570; Wed, 01 Mar 2023 18:48:16 -0800 (PST) Received: from debian.me (subs32-116-206-28-6.three.co.id. [116.206.28.6]) by smtp.gmail.com with ESMTPSA id x21-20020aa793b5000000b005a8de0f4c76sm8873813pff.17.2023.03.01.18.48.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Mar 2023 18:48:14 -0800 (PST) Received: by debian.me (Postfix, from userid 1000) id 8BCA0104006; Thu, 2 Mar 2023 09:48:11 +0700 (WIB) Date: Thu, 2 Mar 2023 09:48:11 +0700 From: Bagas Sanjaya To: yang.yang29@zte.com.cn, akpm@linux-foundation.org, david@redhat.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, wang.yong12@zte.com.cn Subject: Re: [PATCH linux-next] delayacct: improve the average delay precision of getdelay tool to microsecond Message-ID: References: <202302131408087983857@zte.com.cn> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="8wLeOCCbXvPi5D5N" Content-Disposition: inline In-Reply-To: <202302131408087983857@zte.com.cn> X-Rspam-User: X-Rspamd-Queue-Id: 00B194000C X-Rspamd-Server: rspam01 X-Stat-Signature: 5du7yix7kxq5im3crw9k1e1g74dfdpxf X-HE-Tag: 1677725297-820293 X-HE-Meta: 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 3ytWE2II 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.410030, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: --8wLeOCCbXvPi5D5N Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Feb 13, 2023 at 02:08:08PM +0800, yang.yang29@zte.com.cn wrote: > From: Wang Yong >=20 > Improve the average delay precision of getdelay tool to microsecond. > When using the getdelay tool, it is sometimes found that the average > delay except CPU is not 0, but display is 0, because the precison is too > low. For example, see delay average of SWAP below when using ZRAM. >=20 > print delayacct stats ON > PID 32915 > CPU count real total virtual total delay total delay= average > 339202 2793871936 9233585504 7951112 = 0.000ms > IO count delay total delay average > 41 419296904 10ms > SWAP count delay total delay average > 242589 1045792384 0ms > This wrong display is misleading, so improve the millisecond precision > of the average delay to microsecond just like CPU. Then user would > get more accurate information of delay time. I'm kinda confused. 0.000ms is same as 0ms, right? And did you mean accuracy of delay average is to be same as CPU time? --=20 An old man doll... just what I always wanted! - Clara --8wLeOCCbXvPi5D5N Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQSSYQ6Cy7oyFNCHrUH2uYlJVVFOowUCZAAOZAAKCRD2uYlJVVFO o6xvAP0WSORel6xyIqLGNu4/4lTlk9PRFn7O/lcP8vrG6NhNuwEAxqqncRwHWDwo QhdxwBIWfmACP0vVmaSxBU121++GiQQ= =1hUB -----END PGP SIGNATURE----- --8wLeOCCbXvPi5D5N--