Date: Sun, 08 Aug 1999 13:04:10 +0200 From: Mattias Pantzare <pantzer@ludd.luth.se> To: brian@pobox.com Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: The $500 Performance Question Message-ID: <199908081104.NAA28183@zed.ludd.luth.se> In-Reply-To: Message from Brian McGroarty <bvmcg@yahoo.com> of "Fri, 06 Aug 1999 22:15:05 PDT." <19990807051505.3696.rocketmail@web1003.mail.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> I'm not sure I see where building objects to another drive would > help either with lazy writes/soft updates on since the entire > block of files to be written easily fits within RAM. They are not cached forever. Dirty blocks are written everey 30 seconds. = Why = not just try a diffrent disk for obj? > Interestingly, despite there only being a (roughly) 15% decrease > in time, CPU usage jumps tremendously. Most of the time I'm > averaging about 20% free on one CPU and as little as 5% on the > other. I'll be curious to look at the soft update code - I > wonder if that's coded as efficiently as it could be. You can probably blame the giant locks instead. The CPUs will wait for = eachother a lot. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199908081104.NAA28183>