From owner-freebsd-hackers@freebsd.org Tue Nov 6 13:43:33 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C6C5B112409D for ; Tue, 6 Nov 2018 13:43:33 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:d12:604::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id E2DCD76DF4 for ; Tue, 6 Nov 2018 13:43:22 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id wA6DhDvK019456 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 6 Nov 2018 14:43:14 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: steevanxperia@gmail.com Received: from [10.58.0.4] (dadv@[10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id wA6DhC9Q090287 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Tue, 6 Nov 2018 20:43:12 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: FreeBSD 11.x thread creation time is 9000+ microseconds on Intel Xeon Gold series CPU To: Steevan Rodrigues , freebsd-hackers@freebsd.org References: From: Eugene Grosbein Message-ID: Date: Tue, 6 Nov 2018 20:43:13 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.0 SPF_PASS SPF: sender matches SPF record * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: E2DCD76DF4 X-Spamd-Result: default: False [-2.50 / 200.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.99)[-0.993,0]; MX_INVALID(0.50)[greylisted]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-0.98)[-0.977,0]; R_BAD_CTE_7BIT(1.05)[7bit,utf8]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_PERMFAIL(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.94)[-0.942,0]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; IP_SCORE(-1.04)[ipnet: 2a01:4f8::/29(-2.30), asn: 24940(-2.89), country: DE(-0.01)]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Nov 2018 13:43:33 -0000 06.11.2018 11:01, Steevan Rodrigues пишет: > Hi , > I am seeing a FreeBSD 11.x OS poor performance issue . > CPU is Intel(R) Xeon(R) Gold 5115 CPU @ 2.40GHz ( dual socket CPU with 10 > cores per socket ) > > I have attached a simple program which creates thread and computes time > taken to create this thread. On this CPU with FreeBSD 11.x OS it takes 9000 > to 15000 micro seconds ( us) to create > just one thread. > > On other platforms this thread creation time is usually 20 to 30 us only. > Any idea why it takes so much more time with FreeBSD 11.x ? > Is there any processor specific tuning that needs to be done ? Please set "sysctl kern.eventtimer.periodic=1" and retry your tests.