From nobody Sat Mar 25 19:05:56 2023 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4PkT7s3Nkkz41Zqk for ; Sat, 25 Mar 2023 19:06:17 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) (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 (2048 bits) client-digest SHA256) (Client CN "m5p.com", Issuer "R3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4PkT7q4Y6lz3MpZ for ; Sat, 25 Mar 2023 19:06:15 +0000 (UTC) (envelope-from george+freebsd@m5p.com) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of george+freebsd@m5p.com designates 74.104.188.4 as permitted sender) smtp.mailfrom=george+freebsd@m5p.com; dmarc=none Received: from [IPV6:2001:470:1f07:15ff::26] (court.m5p.com [IPv6:2001:470:1f07:15ff:0:0:0:26]) (authenticated bits=0) by mailhost.m5p.com (8.16.1/8.15.2) with ESMTPSA id 32PJ5u1u023375 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO) for ; Sat, 25 Mar 2023 15:06:03 -0400 (EDT) (envelope-from george+freebsd@m5p.com) Message-ID: Date: Sat, 25 Mar 2023 15:05:56 -0400 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: Periodic rant about SCHED_ULE Content-Language: en-US To: freebsd-hackers@freebsd.org References: From: George Mitchell In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.0 required=10.0 tests=HELO_NO_DOMAIN,NICE_REPLY_A autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on mattapan.m5p.com X-Spamd-Result: default: False [-3.28 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-0.99)[-0.994]; NEURAL_HAM_SHORT(-0.99)[-0.991]; R_SPF_ALLOW(-0.20)[+a]; MIME_GOOD(-0.10)[text/plain]; FROM_EQ_ENVFROM(0.00)[]; DMARC_NA(0.00)[m5p.com]; ASN(0.00)[asn:701, ipnet:74.104.0.0/16, country:US]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; MIME_TRACE(0.00)[0:+]; R_DKIM_NA(0.00)[]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; TO_DN_NONE(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; TAGGED_FROM(0.00)[freebsd] X-Rspamd-Queue-Id: 4PkT7q4Y6lz3MpZ X-Spamd-Bar: --- X-ThisMailContainsUnwantedMimeParts: N On 3/25/23 11:47, Peter wrote: > Quoting George Mitchell : > >>> https://forums.freebsd.org/threads/what-is-sysctl-kern-sched-preempt_thresh.85 >>> >> Thank you! -- George > > You're welcome. Can I get a success/failure report? > > > [...] Thanks for your help. Regretfully, I have to report that the patch did not really help in my case (make buildworld while running dnetc). But I have belatedly realized that it's a really good idea to use make -j12 to build kernels and the world. With 4BSD and dnetc running, I can now buildworld in 3512 seconds (down from 20477), and with ULE in 14193 seconds (down from 50290). Peter's patch got it down to 13755 seconds. Also, I have to belatedly admit that my snarky March 23 message to Mark Millard (claiming that all you had to do to run dnetc was to type "service dnetc start") omitted the necessity of doing some first run configuration. I apologize. -- George