From owner-freebsd-bugs@freebsd.org Sat Nov 3 16:37:17 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 761E010DD2B1 for ; Sat, 3 Nov 2018 16:37:17 +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 3437089488 for ; Sat, 3 Nov 2018 16:37:17 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id EA90410DD2AA; Sat, 3 Nov 2018 16:37:16 +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 D955F10DD2A8 for ; Sat, 3 Nov 2018 16:37:16 +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 7BA5689482 for ; Sat, 3 Nov 2018 16:37:16 +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 ABD7384DB for ; Sat, 3 Nov 2018 16:37:15 +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 wA3GbFYa062084 for ; Sat, 3 Nov 2018 16:37:15 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id wA3GbFu1062083 for bugs@FreeBSD.org; Sat, 3 Nov 2018 16:37:15 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 232940] Investigate poor ncsd performance reported in bug 230491 Date: Sat, 03 Nov 2018 16:37:15 +0000 X-Bugzilla-Reason: CC AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: needs-qa, patch, performance X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: cem@freebsd.org 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 keywords bug_severity priority component assigned_to reporter cc dependson 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-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: Sat, 03 Nov 2018 16:37:17 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D232940 Bug ID: 232940 Summary: Investigate poor ncsd performance reported in bug 230491 Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Keywords: needs-qa, patch, performance Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: cem@freebsd.org CC: bugs@FreeBSD.org, cem@freebsd.org, gad@FreeBSD.org, tom@hur.st Depends on: 230491 See comments #2, 5, 6, and 14 on bug 230491. > The built-in caching doesn't seem useful for this case. Enabling it resu= lts in a test run creating this unfortunate entry in top: > > 63957 root 9 52 0 24000K 4696K uwait 19 9:15 268.91% = nscd > > and actually *slows down* stat(1) in my tests - /usr/src goes from 22 sec= onds to almost 90, and my CVS repository scan goes from 55 seconds to 2 min= utes. > Reducing thread count improves performance with nscd, but at "threads 1" = it's still 52s vs 22s uncached. Referenced Bugs: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D230491 [Bug 230491] stat(1): Improve performance with getpwuid() and getgrgid() caching --=20 You are receiving this mail because: You are on the CC list for the bug. You are the assignee for the bug.=