Date: Fri, 22 Sep 2006 22:23:57 -0500 (EST) From: Yoshihiro Ota <ota@j.email.ne.jp> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/103532: Interrupt storm in 6.2-PRERELEASE Message-ID: <200609230323.k8N3NvLZ027267@dynabook.advok.com> Resent-Message-ID: <200609232120.k8NLKPKe065559@freefall.freebsd.org>
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>Number: 103532 >Category: kern >Synopsis: Interrupt storm in 6.2-PRERELEASE >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Sep 23 21:20:25 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Yoshihiro Ota >Release: FreeBSD 6.2-PRERELEASE i386 >Organization: >Environment: System: FreeBSD xxx.yyy.com 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #23: Wed Sep 20 00:16:08 EST 2006 root@xxx.yyy.com:/usr/obj/usr/src/sys/GENERIC i386 ad0: 57231MB <TOSHIBA MK6021GAS GA024A> at ata0-master PIO4 acd0: CDRW <DW-224E-A/7.2A> at ata1-master UDMA33 da0 at umass-sim0 bus 0 target 0 lun 0 da0: <SAMSUNG SP2514N 0000> Fixed Direct Access SCSI-0 device da0: 40.000MB/s transfers da0: 238475MB (488397168 512 byte sectors: 255H 63S/T 30401C) >Description: When heavy I/O occurs, interrupts eat almost all available CPU. When the same operation is done on 6.1-RELEASE, the CPU use and the number of interrupts are very low. It seems that it only happens with my ad0 device in my system. I did not see many interrupts when I did the same command on da0 device. >How-To-Repeat: # mount /dev/ad0sX /mnt/tmp # tar xf /path/to/ports.tar.gz -C /mnt/tmp >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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