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SubjectRe: problem with smp
> > I have 3 machines I tested on.
> >
> > 1: dual pII450 running @ 504mhz 256mb ram (using mtrr)
> > 2: single p233mmx running @ 262mhz 64mb ram
> > 3: dual p233mmx running @ 233mhz 256mb ram (using mtrr)
> >
> > computer 1 compiles 2.2.10 in ~ 3 minutes
> > computer 2 compiles 2.2.10 in ~ 11 minutes
> > computer 3 compiles 2.2.10 in > 20 minutes
> >
> > Anyone know why #3 is 2x slower as #2 (2 is uniproc and 3 is dualproc with
> > the same chip)
> >
>
> How about disk speed (hdparm -t -T /dev/hd?) ?

Scsi disks except #2.
Computer 1: adaptec aha-2940U quantum 8.4gb scsi
Computer 2: ide, 420mb wdc
Computer 3: adaptec aha-2940U micropolis 2.0gb scsi

> Swap space (free)?

Computer 1: 64mb swap total, usually 5mb used (256mb physical ram)
Computer 2: 20mb swap total, usually 10mb used (64mb physical ram)
Computer 3: 100mb swap total, usually 10mb used (256mb physical ram)

> Did you modified the Makefile for SMP builds (MAKE=make -j 3)?

Computer 1: make -j 20 dep;make -j 20 zImage modules
Computer 2: make -j 10 dep;make -j 10 zImage modules
Computer 3: same as computer 1

> Are you sure you have all CPU enabled (cat /proc/cpuinfo)?

Definately.

> Are you running a SMP kernel (cat /proc/version)?

Definately. Using 2.2.7 on computer 1 and 2, 2.2.10 on computer 3 Which is
really irrelevent, I've used 2.2.1 - 2.2.10 on computer 3 and it has always
taken 20+ minutes.

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