Date: Thu, 3 Oct 2002 11:42:02 -0400 From: Steve Shorter <steve@nomad.lets.net> To: stable@freebsd.org Subject: Tuning kern.polling Message-ID: <20021003114202.A48705@nomad.lets.net>
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Howdy! I was doing some stress testing of a SCSI chain on a 4.6.2 system with 2 big RAID volumes by just having lots of processes moving lots of data over the SCSI buss. The box has fxp network interfaces with polling enabled. the kernel config has options HZ=1000. kern.polling.user_frac = 50 During the testing the following messages started to appear in the logs. /kernel: poll stalled [65] in phase 2 /kernel: poll stalled [66] in phase 2 /kernel: poll stalled [67] in phase 2 .. etc Also I was unable to ssh to the box during this period. So I figure that the polling system needs to be tuned. Do I need increase the clock (options HZ) and/or increase/decrease kern.polling.user_frac? or is this symtpmatic of some other problem? -steve To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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