Re: problem with smp

Wakko Warner (wakko@animx.eu.org)
Tue, 29 Jun 1999 09:23:08 -0400

> > 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
>
> Perhaps the 3rd machine has a crippled Intel chipset that won't cache accesses
> over 64Mb? What does /proc/mtrr look like for these machines?

The 3rd machine has a bios option for 64/512mb cachable. Ok, I changed that
to 512 from 64. Computer 3 went from 20 minutes to about 12.5 minutes.
Still slower than computer 2 which has a slightly faster chip, but computer
3 has 2 chips. There is no /proc/mtrr even though I have mtrr compiled in.
Any reason why that is?

-- cpu info for computer 3 --
processor : 0
vendor_id : GenuineIntel
cpu family : 5
model : 4
model name : Pentium MMX
stepping : 3
cpu MHz : 232.675411
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 apic mmx
bogomips : 463.67

processor : 1
vendor_id : GenuineIntel
cpu family : 5
model : 4
model name : Pentium MMX
stepping : 3
cpu MHz : 232.675411
fdiv_bug : no
hlt_bug : no
sep_bug : no
f00f_bug : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 apic mmx
bogomips : 463.67

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