From owner-freebsd-geom@FreeBSD.ORG Mon Apr 8 11:06:44 2013 Return-Path: Delivered-To: freebsd-geom@FreeBSD.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 9B8E61E4 for ; Mon, 8 Apr 2013 11:06:44 +0000 (UTC) (envelope-from owner-bugmaster@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) by mx1.freebsd.org (Postfix) with ESMTP id 7E539351 for ; Mon, 8 Apr 2013 11:06:44 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.6/8.14.6) with ESMTP id r38B6iAr057223 for ; Mon, 8 Apr 2013 11:06:44 GMT (envelope-from owner-bugmaster@FreeBSD.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.6/8.14.6/Submit) id r38B6hvr057221 for freebsd-geom@FreeBSD.org; Mon, 8 Apr 2013 11:06:43 GMT (envelope-from owner-bugmaster@FreeBSD.org) Date: Mon, 8 Apr 2013 11:06:43 GMT Message-Id: <201304081106.r38B6hvr057221@freefall.freebsd.org> X-Authentication-Warning: freefall.freebsd.org: gnats set sender to owner-bugmaster@FreeBSD.org using -f From: FreeBSD bugmaster To: freebsd-geom@FreeBSD.org Subject: Current problem reports assigned to freebsd-geom@FreeBSD.org X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Apr 2013 11:06:44 -0000 Note: to view an individual PR, use: http://www.freebsd.org/cgi/query-pr.cgi?pr=(number). The following is a listing of current problems submitted by FreeBSD users. These represent problem reports covering all versions including experimental development code and obsolete releases. S Tracker Resp. Description -------------------------------------------------------------------------------- o kern/176744 geom [geom] [patch] BIO_FLUSH not recorded by devstats o kern/170038 geom [geom] geom_mirror always starts degraded after reboot o kern/169539 geom [geom] [patch] fix ability to run gmirror on MSI MegaR a bin/169077 geom bsdinstall(8) does not use partition labels in /etc/fs f kern/165745 geom [geom] geom_multipath page fault on removed drive o kern/165428 geom [glabel][patch] Add xfs support to glabel o kern/164254 geom [geom] gjournal not stopping on GPT partitions o kern/164252 geom [geom] gjournal overflow o kern/164143 geom [geom] Partition table not recognized after upgrade R8 a kern/163020 geom [geli] [patch] enable the Camellia-XTS on GEOM ELI o kern/162690 geom [geom] gpart label changes only take effect after a re o kern/162010 geom [geli] panic: Provider's error should be set (error=0) o kern/161979 geom [geom] glabel doesn't update after newfs, and glabel s o kern/161752 geom [geom] glabel(8) doesn't get gpt label change o bin/161677 geom gpart(8) Probably bug in gptboot o kern/160409 geom [geli] failed to attach provider f kern/159595 geom [geom] [panic] panic on gmirror unload in vbox [regres f kern/159414 geom [isp] isp(4)+gmultipath(8) : removing active fiber pat p kern/158398 geom [headers] [patch] includes o kern/158197 geom [geom] geom_cache with size>1000 leads to panics o kern/157879 geom [libgeom] [regression] ABI change without version bump o kern/157863 geom [geli] kbdmux prevents geli passwords from being enter o kern/157739 geom [geom] GPT labels with geom_multipath o kern/157724 geom [geom] gpart(8) 'add' command must preserve gap for sc o kern/157723 geom [geom] GEOM should not process 'c' (raw) partitions fo o kern/157108 geom [gjournal] dumpon(8) fails on gjournal providers o kern/155994 geom [geom] Long "Suspend time" when reading large files fr o kern/154226 geom [geom] GEOM label does not change when you modify them o kern/150858 geom [geom] [geom_label] [patch] glabel(8) is not compatibl o kern/150626 geom [geom] [gjournal] gjournal(8) destroys label o kern/150555 geom [geom] gjournal unusable on GPT partitions o kern/150334 geom [geom] [udf] [patch] geom label does not support UDF o kern/149762 geom volume labels with rogue characters o bin/149215 geom [panic] [geom_part] gpart(8): Delete linux's slice via o kern/147667 geom [gmirror] Booting with one component of a gmirror, the o kern/145818 geom [geom] geom_stat_open showing cached information for n o kern/145042 geom [geom] System stops booting after printing message "GE o kern/143455 geom gstripe(8) in RELENG_8 (31st Jan 2010) broken o kern/142563 geom [geom] [hang] ioctl freeze in zpool o kern/141740 geom [geom] gjournal(8): g_journal_destroy concurrent error o kern/140352 geom [geom] gjournal + glabel not working o kern/135898 geom [geom] Severe filesystem corruption - large files or l o kern/134113 geom [geli] Problem setting secondary GELI key o kern/133931 geom [geli] [request] intentionally wrong password to destr o bin/132845 geom [geom] [patch] ggated(8) does not close files opened a o bin/131415 geom [geli] keystrokes are unregulary sent to Geli when typ o kern/131353 geom [geom] gjournal(8) kernel lock o kern/129674 geom [geom] gjournal root did not mount on boot o kern/129645 geom gjournal(8): GEOM_JOURNAL causes system to fail to boo o kern/129245 geom [geom] gcache is more suitable for suffix based provid o kern/127420 geom [geom] [gjournal] [panic] Journal overflow on gmirrore o kern/124973 geom [gjournal] [patch] boot order affects geom_journal con o kern/124969 geom gvinum(8): gvinum raid5 plex does not detect missing s o kern/123962 geom [panic] [gjournal] gjournal (455Gb data, 8Gb journal), o kern/123122 geom [geom] GEOM / gjournal kernel lock o kern/122738 geom [geom] gmirror list "losts consumers" after gmirror de o kern/122067 geom [geom] [panic] Geom crashed during boot o kern/121364 geom [gmirror] Removing all providers create a "zombie" mir o kern/120091 geom [geom] [geli] [gjournal] geli does not prompt for pass o kern/115856 geom [geli] ZFS thought it was degraded when it should have o kern/115547 geom [geom] [patch] [request] let GEOM Eli get password fro o kern/113837 geom [geom] unable to access 1024 sector size storage o kern/113419 geom [geom] geom fox multipathing not failing back o kern/107707 geom [geom] [patch] [request] add new class geom_xbox360 to o kern/94632 geom [geom] Kernel output resets input while GELI asks for o kern/90582 geom [geom] [panic] Restore cause panic string (ffs_blkfree o bin/90093 geom fdisk(8) incapable of altering in-core geometry o kern/87544 geom [gbde] mmaping large files on a gbde filesystem deadlo o bin/86388 geom [geom] [geom_part] periodic(8) daily should backup gpa o kern/84556 geom [geom] [panic] GBDE-encrypted swap causes panic at shu o kern/79251 geom [2TB] newfs fails on 2.6TB gbde device o kern/79035 geom [vinum] gvinum unable to create a striped set of mirro o bin/78131 geom gbde(8) "destroy" not working. 73 problems total. From owner-freebsd-geom@FreeBSD.ORG Sat Apr 13 10:00:00 2013 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id D3CE819E; Sat, 13 Apr 2013 10:00:00 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-ee0-f44.google.com (mail-ee0-f44.google.com [74.125.83.44]) by mx1.freebsd.org (Postfix) with ESMTP id 4736BA99; Sat, 13 Apr 2013 09:59:59 +0000 (UTC) Received: by mail-ee0-f44.google.com with SMTP id c41so1617765eek.3 for ; Sat, 13 Apr 2013 02:59:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:sender:message-id:date:from:user-agent:mime-version:to :subject:content-type:content-transfer-encoding; bh=RhCqstBPNV+kOI0U6HDfLAY5u503SAlnFetgdPL7HnM=; b=pI2/N+Cvttfi7SxaSdWsTP3f6hKQGQ557SWJAEb0avZ0Dk16+kB2mLpUtxkKTI5Zgr A6F6XYP0z8vOmWdTBvBpMzBBI52+3jH8XWgC3in+8g1zDWAAab/OmC2e7CDBi5K3rs9R 5Wfw+8V4m2dVMFXp6za2V/kB0n8aHav/R44Dx2rStAXyJH0Lat5GgR9wxmoPlIn6zvXB 6u6IxyrwWqQQHGu6O3o5BFRWrVsIsQBmb2b7elV3/XgWv7W0wJzA8tD1dpg9VaAn5UIm joIuLipJc3W4bE2/U1kol0JfjrboHxz0qc5dlTurCOeyrn0QKlR5EHXtOimHwhQkgLuO chrQ== X-Received: by 10.15.102.3 with SMTP id bq3mr37751103eeb.42.1365847193119; Sat, 13 Apr 2013 02:59:53 -0700 (PDT) Received: from mavbook.mavhome.dp.ua (mavhome.mavhome.dp.ua. [213.227.240.37]) by mx.google.com with ESMTPS id cd3sm15594347eeb.6.2013.04.13.02.59.51 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 13 Apr 2013 02:59:52 -0700 (PDT) Sender: Alexander Motin Message-ID: <51692C95.3010901@FreeBSD.org> Date: Sat, 13 Apr 2013 12:59:49 +0300 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:17.0) Gecko/20130326 Thunderbird/17.0.4 MIME-Version: 1.0 To: freebsd-geom@FreeBSD.org, freebsd-hackers@FreeBSD.org Subject: devstat overhead VS precision Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 13 Apr 2013 10:00:00 -0000 Hi. It is long known that collecting disk and GEOM statistics may cause significant processing overhead under high IOPS. On my recent high-IOPS benchmarks performance difference was reaching three times! Last time situation improved a lot by more active use of TSC, but there are still many systems where TSCs are not synchronized. I propose to switch that statistics from using binuptime() to getbinuptime() to solve the problem globally. From one side getbinuptime() resolution is limited by 1ms, but since time is usually averaged over the many I/Os, additional sub-millisecond precision will come from sampling. Since most of tools now show request processing times up to 0.1ms, that precision should be sufficient. I believe real disk performance is more important that n-th digit in some statistics. The following patch does the change and makes disk performance irrelevant to the timecounter performance: http://people.freebsd.org/~mav/devstat_time.patch Are there any objections against it? -- Alexander Motin