From owner-freebsd-current@freebsd.org Wed Mar 31 09:35:29 2021 Return-Path: Delivered-To: freebsd-current@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2B8115C1C81 for ; Wed, 31 Mar 2021 09:35:29 +0000 (UTC) (envelope-from agh@riseup.net) Received: from mx1.riseup.net (mx1.riseup.net [198.252.153.129]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "*.riseup.net", Issuer "Sectigo RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4F9LlN0mhyz4q2Z for ; Wed, 31 Mar 2021 09:35:27 +0000 (UTC) (envelope-from agh@riseup.net) Received: from fews2.riseup.net (fews2-pn.riseup.net [10.0.1.84]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client CN "*.riseup.net", Issuer "Sectigo RSA Domain Validation Secure Server CA" (not verified)) by mx1.riseup.net (Postfix) with ESMTPS id 4F9LlL0qfszDrMs; Wed, 31 Mar 2021 02:35:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=riseup.net; s=squak; t=1617183326; bh=kq2AoFMWi2atIAm9rf5z+qUu7qinEz4i2Jx5gYnMAUY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=LxT/xt/tW+rp6XBlFtQG+VWducbbXV10Te+QwiaP5REPJAD92YgggQeBr4IhlyEHN 0iw5Oou+IrWSGQuqpk7vYTSz+bhiwSNDjyttCr8+oiMBWjMGDFWMVmXfLyNyTDMfy2 dlLYtWr1DysU0FF6MELr4A7MzhbKO5BJX5VBNJi8= X-Riseup-User-ID: 7C2D7979A3E624E488C27A1DC0C6EE5A541A7D94BFFE31A3BCAE2B79F3F58C8D Received: from mail.riseup.net (localhost.riseup.net [127.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by fews2.riseup.net (Postfix) with ESMTPSA id 4F9LlK6T3Qz1xms; Wed, 31 Mar 2021 02:35:25 -0700 (PDT) MIME-Version: 1.0 Date: Wed, 31 Mar 2021 02:35:25 -0700 From: Alastair Hogge To: Hans Petter Selasky Cc: Santiago Martinez , freebsd-current@freebsd.org Subject: Re: freebsd 13 ryzen micro stutter In-Reply-To: <2a4dad60-f1b8-8d48-337a-d23893a84f04@selasky.org> References: <20210323101146.18c9a969@bsd64.grem.de> <677da81d7af9781be6b46c7cba4efd05@riseup.net> <54768f44-c110-d58a-1e7b-61843cde754e@codenetworks.net> <9638abfe-fd9e-6855-b3c7-ee796d1c5ce5@codenetworks.net> <2a4dad60-f1b8-8d48-337a-d23893a84f04@selasky.org> Message-ID: Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4F9LlN0mhyz4q2Z X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=riseup.net header.s=squak header.b=LxT/xt/t; dmarc=pass (policy=none) header.from=riseup.net; spf=pass (mx1.freebsd.org: domain of agh@riseup.net designates 198.252.153.129 as permitted sender) smtp.mailfrom=agh@riseup.net X-Spamd-Result: default: False [-5.10 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; RWL_MAILSPIKE_GOOD(0.00)[198.252.153.129:from]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[riseup.net:+]; DMARC_POLICY_ALLOW(-0.50)[riseup.net,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[198.252.153.129:from]; ASN(0.00)[asn:16652, ipnet:198.252.153.0/24, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_IN_DNSWL_LOW(-0.10)[198.252.153.129:from]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[riseup.net:s=squak]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; SPAMHAUS_ZRD(0.00)[198.252.153.129:from:127.0.2.255]; DWL_DNSWL_LOW(-1.00)[riseup.net:dkim]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 31 Mar 2021 09:35:29 -0000 On 2021-03-28 16:09, Hans Petter Selasky wrote: > On 3/27/21 11:54 AM, Santiago Martinez wrote: >> Hi, i have the same output as @Nils B. If i run with steal =2 and dtrace the micro stutter doesn't happen but as soon as i stop the dtrace script it the stutters come back again. >> > > Here is a patch which you can try. Not sure if it helps. > https://reviews.freebsd.org/D29467 Thanks Hans, this reduces jitter somewhat, but it still noticeable in Quake2. I left kern.sched.steal_thresh at 1. To good health, Alastair.