From owner-freebsd-bugs@freebsd.org Thu Nov 22 05:04:23 2018 Return-Path: Delivered-To: freebsd-bugs@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 648C2113737E for ; Thu, 22 Nov 2018 05:04:23 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id E129F8A513 for ; Thu, 22 Nov 2018 05:04:22 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id A486D113737C; Thu, 22 Nov 2018 05:04:22 +0000 (UTC) Delivered-To: bugs@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 8209B113737B for ; Thu, 22 Nov 2018 05:04:22 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0B03F8A512 for ; Thu, 22 Nov 2018 05:04:22 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 251656DBE for ; Thu, 22 Nov 2018 05:04:21 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id wAM54LPW043707 for ; Thu, 22 Nov 2018 05:04:21 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id wAM54LjH043706 for bugs@FreeBSD.org; Thu, 22 Nov 2018 05:04:21 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 233395] In FreeBSD 11.x contigfree takes too much time on Xeon Gold 5115 CPU Date: Thu, 22 Nov 2018 05:04:20 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.2-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: steevanxperia@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Rspamd-Queue-Id: E129F8A513 X-Spamd-Result: default: False [1.45 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_SPAM_LONG(0.42)[0.416,0]; NEURAL_SPAM_MEDIUM(0.36)[0.355,0]; ASN(0.00)[asn:10310, ipnet:2001:1900:2254::/48, country:US]; NEURAL_SPAM_SHORT(0.68)[0.681,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Nov 2018 05:04:23 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233395 Bug ID: 233395 Summary: In FreeBSD 11.x contigfree takes too much time on Xeon Gold 5115 CPU Product: Base System Version: 11.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: steevanxperia@gmail.com Created attachment 199442 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D199442&action= =3Dedit Contains simple kernel module source and a makefile Hi I am seeing a FreeBSD 11.x OS poor performance issue on Xeon Gold CPU. CPU is Intel(R) Xeon(R) Gold 5115 CPU @ 2.40GHz ( dual socket CPU with 10 c= ores per socket ) I have attached a simple kernel module program ( for FreeBSD) and its Makef= ile. This just allocates 32KB contiguous memory using contigmalloc and then fre= es it using contigfree. This repeated 1000 times and time taken by contigmalloc and contigfree is computed . I can see that contigfree takes way too much time . I have another older server running FreeBSD 11.2 Intel(R) Xeon(R) CPU E5-= 2620 v2 @ 2.10GHz (dual socket 6 core per socket and in this I do not see such = an issue . Any idea why contigfree takes so much time on FreeBSD 11.x running on Xeon = Gold 5115 CPU ? It looks like this issue affects only the systems which have more than 16 physical CPU cores. Because of this issue the driver for our PCIe card takes more than 2 minute= s to load and upto 15 minutes to unload.=20 System and CPU details:=20 CPU: Intel(R) Xeon(R) Gold 5115 CPU @ 2.40GHz (2400.07-MHz K8-class CPU) FreeBSD/SMP: Multiprocessor System Detected: 40 CPUs System Information Manufacturer: Supermicro Product Name: Super Server Version: 0123456789 Base Board Information Manufacturer: Supermicro Product Name: X11DPH-Tq Version: 1.01 Regards, Steevan --=20 You are receiving this mail because: You are the assignee for the bug.=