Date: Tue, 04 Nov 1997 01:07:03 -0800 (PST) From: Simon Shapiro <Shimon@i-Connect.Net> To: dyson@FreeBSD.ORG Cc: freebsd-current@FreeBSD.ORG Subject: Re: More on fast make world... Message-ID: <XFMail.971104010703.Shimon@i-Connect.Net> In-Reply-To: <199711040754.CAA00612@dyson.iquest.net>
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Hi John S. Dyson; On 04-Nov-97 you wrote: > Simon Shapiro said: > > I really am not so sure what takes the time, but it is not disk I/O. > > > > I setup a test machine with 128MB of RAM, a RAID-1 root disk, a RAID-0 > > 8x32KB stripes wide for /usr/src and /usr/obj, on a DPT PM3334UDW > > (Ultra, > > wide, differential). Disks are 4GB Barcudas all around. > > > > This configuration is capable of 980+ disk I/O per second on the RAID-1 > > and > > 1740+ on the RAID-0 array. > > > > Starting with a fresh install, SMP kernel current for today, DPT > > configured > > with no options, but the performance monitors and a 1 sec timeout hack > > to > > catch lost interrupts (new firmware that may be a bit buggy). > > > > Top reports (abbreviated): > > > > load averages: 7.36, 6.59, 5.06 > > CPU states: 54.1% user, 0.0% nice, 44.4% system, 1.6% interrupt, > > 0.0%idle > > Mem: 11M Active, 17M Inact, 23M Wired, 47M Cache, 8248K Buf, 26M Free > > > > Iostat says: > > > > tty sd0 sd16 cpu > > tin tout sps tps msps sps tps msps us ni sy in id > > 0 1905 771 74 0.0 668 56 0.0 27 0 51 2 20 > > > > This is typical over the last hour or so. Anything else I should try? > > > Try increasing the size of the vnode cache: > sysctl -w debug.wantfreevnodes=15000 > > Make sure you are using -pipe, if not, then use MFS for /tmp or > wherever your tempfiles go... Silly question: How do I do that? Last I tried I ended in a panic... How large? Where to mount? /tmp or /var/tmp? I foreget ... Without these improvements, we are at 102 minutes end-to-end. Let's go for sub-hour make world! > > -- > John > dyson@freebsd.org > jdyson@nc.com --- If Microsoft Built Cars: Every time they repainted the lines on the road, you'd have to buy a new car. Sincerely Yours, Simon Shapiro Atlas Telecom Senior Architect 14355 SW Allen Blvd., Suite 130 Beaverton OR 97005 Shimon@i-Connect.Net Voice: 503.799.2313
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