Re: Test: HighPoint RocketRaid 3120 PCIex1 2xSATA controller under FreeBSD 7.1-PRERELEASE
Dieter wrote: >> If you get about the same scores with dd, try using a higher read-ahead >> (vfs.read_max value, set it to 32 for example). Also sometimes it's >> required to use a higher blocksize to get full potential, try: >> >> newfs -U -b 32768 /dev/ >> >> Warning: using 64KiB blocksize you risk hanging the system under heavy >> load (like 2 bonnies running simultaniously). >> > > What's this about 64KiB blocksize hanging the system? > Hang awhile then recover, or hang forever need a reboot? > Is this a RAID thing or are normal disks at risk? > See this, posted 2 years ago to freebsd-fs: http://freebsd.monkey.org/freebsd-fs/200610/msg00024.html Scott Long says the bug in vfs_bio.c is known but difficult to fix. They also argued that using a 64KiB blocksize should not be necessary. I have been getting slightly higher scores with 64KiB blocksize though, also with perfect alignment. 32KiB should be safe to use, i have not managed to crash the system under heavy I/O load. I'm curious if my suggestions gave you any better results, though. Regards, Veronica ___ freebsd-hardware@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Interrupts issues
Hi FreeBSD hackers: I have two Dell workstations that I recently added FreeBSD 6.2 on. One is a Precision T3400, one is an Inspiron 530. Nothing fancy. Installed FBsd. Everything else is fine except both machines have interrupt storm issues: one core (both dual core) is 100% servicing interrupts. On the Precision, it's irq20 atapci, on Inspiron it's irq19 uhci. The other core is fine and both machines run well otherwise. I saw several recent posts on the net about some of these issues and did not find a resolution. It seems unlikely that it's just a ata or usb issue since both machines happen to have the same problem. Any thoughts? Thanks, Benjie ___ freebsd-hardware@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: Interrupts issues
On Fri, Sep 19, 2008 at 12:04 PM, Benjie Chen <[EMAIL PROTECTED]> wrote: > Hi FreeBSD hackers: > > I have two Dell workstations that I recently added FreeBSD 6.2 on. One > is a Precision T3400, one is an Inspiron 530. Nothing fancy. Installed > FBsd. Everything else is fine except both machines have interrupt > storm issues: one core (both dual core) is 100% servicing interrupts. > On the Precision, it's irq20 atapci, on Inspiron it's irq19 uhci. The > other core is fine and both machines run well otherwise. > > I saw several recent posts on the net about some of these issues and > did not find a resolution. It seems unlikely that it's just a ata or > usb issue since both machines happen to have the same problem. > > Any thoughts? Please provide the output of "dmesg" after a boot in verbose mode. This may help the maintainers to understand your problem and give you additional instructions. Do you have any special reason to use FreeBSD 6.2? It is a rather old version, so I'd suggest you to try 7.1 instead. There are prerelease images available. Look at http://www.freebsd.org/where.html -- cd /usr/ports/sysutils/life make clean ___ freebsd-hardware@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[EMAIL PROTECTED]"
