Date: Wed, 21 Jan 2004 10:46:19 +0100 (CET) From: Klaus Robert Suetterlin <krs@geclab1.cips.mpg.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/61669: writing to 3ware escalade (twe) spends 90% of cpu in system. Message-ID: <200401210946.i0L9kJuM003346@geclab1.cips.mpg.de> Resent-Message-ID: <200401210950.i0L9oFAd063429@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 61669 >Category: kern >Synopsis: writing to 3ware escalade (twe) spends 90% of cpu in system. >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Wed Jan 21 01:50:15 PST 2004 >Closed-Date: >Last-Modified: >Originator: Klaus Robert Suetterlin >Release: FreeBSD 5.2-CURRENT i386 >Organization: Max-Planck-Institut >Environment: System: FreeBSD geclab1.cips.mpg.de 5.2-CURRENT FreeBSD 5.2-CURRENT #2: Tue Jan 20 14:35:53 CET 2004 krs@geclab1.cips.mpg.de:/usr/obj/usr/src/sys/GECLAB1 i386 I removed all INVARIANTS and WITNESS related options from the kerneli configuration. MPTable: <COMPAQ PROLIANT > CPU: Intel Pentium III (927.11-MHz 686-class CPU) real memory = 805306368 (768 MB) avail memory = 782446592 (746 MB) pcib5: <ServerWorks NB6635 3.0LE host to PCI bridge> at pcibus 5 on motherboard pci5: <PCI bus> on pcib5 twe0: <3ware 7000 series Storage Controller. Driver version 1.50.00.000> port 0x b040-0xb04f mem 0xd0800000-0xd0ffffff,0xd0200000-0xd020000f irq 10 at device 2.0 on pci5 twe0: 4 ports, Firmware FE7S 1.05.00.063, BIOS BE7X 1.08.00.048 The 3ware escalade is a 8506-4LP (64Bit, 66MHz) which is plugged into a 64Bit, 33MHz pci slot. It has 4 250GB SATA disks in Raid0. >Description: (I posted this to freebsd-current, but couldn't get any solution.) Writing to the 3ware escalade uses up all my cpu time. When I do ``dd if=/dev/zero of=/space/test bs=1000000 count=10000'', systat -vmstat reports: 500 Interrupts total, 280 in twe. CPU usage is 90% system, 1% interrupt, 9% idle. The twe is serving 128KB/t at 570 tps for a total of 72MB/s, beeing only 75% busy. With INVARIANTS and WITNESS options in the kernel system uses up all cpu, but twe only serves 30MB/s. >How-To-Repeat: Always on. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200401210946.i0L9kJuM003346>