Date: Mon, 12 Jul 1999 14:13:24 +1000 From: Stephen McKay <syssgm@detir.qld.gov.au> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Stephen McKay <syssgm@detir.qld.gov.au>, freebsd-current@FreeBSD.ORG Subject: Re: Stuck in "objtrm" - live kernel test to run Message-ID: <199907120413.OAA13966@nymph.detir.qld.gov.au> In-Reply-To: <199907100711.AAA53510@apollo.backplane.com> from Matthew Dillon at "Sat, 10 Jul 1999 00:11:43 -0700" References: <199907081828.LAA41802@apollo.backplane.com> <199907091033.UAA03176@nymph.detir.qld.gov.au> <199907100711.AAA53510@apollo.backplane.com>
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On Saturday, 10th July 1999, Matthew Dillon wrote: > I'm trying to simulate your 486 setup. You must love pain! A make -j5 > buildworld on a 16MB-limited machine pages like hell (200-400 pageins/sec > AND 200-400 pageouts/sec simultaniously, almost continuously). Maximal pain, maximal gain! :-) The only reason I'm using a big, powerful 486 is that my 386 here died and there were none left to replace it. With NFS src and obj, make world was taking over a week. No joking. > Are you > using any special sysctls or special kernel config options? I have been using "sysctl -w vm.swap_async_max=2" for a while. It seems to help throughput on this machine, and definitely helps interactive performance. I suspect that a few extra I/O limiters, or some sort of I/O rate quota system would help enforce fairness even on faster machines. For example, we have a performance anomaly with squid on 3.2 that could be over-eager pagedaemon behaviour flooding the I/O system. > Also, try the latest -CURRENT and see if you can still get it stuck in > objtrm. I haven't had any luck so far in my simulation. If you still > get stuck in objtrm then try Alan's patch and see if that has an effect. Maybe you should send me your latest patch, the atomic_* fixer and I'll give it a whirl. It hasn't turned up in the cvs-cur CTM patches yet. Stephen. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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