Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S271898AbTGYD0S (ORCPT ); Thu, 24 Jul 2003 23:26:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S271899AbTGYD0S (ORCPT ); Thu, 24 Jul 2003 23:26:18 -0400 Received: from conure.mail.pas.earthlink.net ([207.217.120.54]:11468 "EHLO conure.mail.pas.earthlink.net") by vger.kernel.org with ESMTP id S271898AbTGYD0Q (ORCPT ); Thu, 24 Jul 2003 23:26:16 -0400 Date: Thu, 24 Jul 2003 23:43:52 -0400 To: linux-kernel@vger.kernel.org Subject: dbench has intermittent hang on 2.6.0-test1-ac2 Message-ID: <20030725034352.GA10261@rushmore> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i From: rwhron@earthlink.net Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2424 Lines: 75 dbench 64 hung during a run using 2.6.0-test1-ac2 on ext3. One of the dbench processes never created the clients/clientsXX directory. The parent dbench-2.0 process continues to update the throughput measurement and the MB/sec slowly drops. I saw the same behavior on a dbench 32 run with 2.6.0-test1-ac1 on reiserfs. ps -ef|grep dbenc[h] root 12266 11460 0 21:24 pts/0 00:00:00 ./dbench 64 root 12320 12266 0 21:24 pts/0 00:00:00 ./dbench 64 It isn't highly reproduceable. Of 28 different dbench runs on 2.6.0-test1-ac[12], only 2 have done this. Uniprocessor x86 running RedHat 7.3 + patches. Sysrq T for the dbench processes shows: dbench R C010F024 4089854812 12266 11460 12320 (NOTLB) c909df60 00000082 bffffa58 c010f024 d5439360 d5439360 00000001 fffffe00 00000000 c0118dda c909c000 00000001 00000000 d5439360 c0113e10 00000000 00000000 c909dfc4 c010836b c909dfc4 00000000 d5439360 c0113e10 d54394b4 Call Trace: [] restore_i387+0x54/0x80 [] sys_wait4+0x1ea/0x220 [] default_wake_function+0x0/0x20 [] sys_sigreturn+0x8b/0xc0 [] default_wake_function+0x0/0x20 [] syscall_call+0x7/0xb dbench S C46F3FC4 4028283312 12320 12266 (NOTLB) c46f3fb8 00000086 00000000 c46f3fc4 d4546060 0000000b 00000774 00000040 c46f2000 c0120f14 c0108e27 0000000b 00000000 40013000 00000774 00000040 bffffb28 0000001d 0000007b 0000007b 0000001d 400c6837 00000073 00000246 Call Trace: [] sys_pause+0x14/0x20 [] syscall_call+0x7/0xb strace -p 12320 # child pause( kill 12320 kill -INT 12320 The state changes from S to T. ps axu|grep dbenc[h] root 12266 0.0 0.1 1364 424 pts/0 S 21:24 0:00 ./dbench 64 root 12320 0.0 0.0 1360 356 pts/0 T 21:24 0:00 ./dbench 64 cat /proc/12320/wchan finish_stop kill -CONT 12320 # child and parent exit All of output at: http://home.earthlink.net/~rwhron/kernel/sysrq-t.txt config at http://home.earthlink.net/~rwhron/kernel/config/config-2.6.0-test1-ac2 -- Randy Hron http://home.earthlink.net/~rwhron/kernel/bigbox.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/