Date: Tue, 4 Nov 1997 04:17:19 -0500 (EST) From: "John S. Dyson" <toor@dyson.iquest.net> To: Shimon@i-Connect.Net (Simon Shapiro) Cc: dyson@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: Re: More on fast make world... Message-ID: <199711040917.EAA00368@dyson.iquest.net> In-Reply-To: <XFMail.971104010703.Shimon@i-Connect.Net> from Simon Shapiro at "Nov 4, 97 01:07:03 am"
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Simon Shapiro said: > > 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! > This is my fstab entry. You'll also have to add the MFS option to the kernel. The -s param should be smaller than your amount of swap. To add -pipe, just edit your /etc/make.conf file and add -pipe to your CFLAGS entry. swap /tmp mfs rw,-s=210000,-b=16384,-f=2048 0 0 -- John dyson@freebsd.org jdyson@nc.com
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