[Beowulf] Performance issue - CPU Intel 00/02
bill at Princeton.EDU
Wed Jul 20 09:03:25 PDT 2005
The CPU is verified as a P4. The problem does NOT move with the CPU but
stays with the motherboard. I will attempt to upgrade the BIOS to a
more recent version than 1.04 in the next week, as soon as I can locate
an external USB drive, to see if thgis doesn't correct the situation.
Again, according to the initial BIOS screen, it sees the chip as a P4.
But maybe something is corrupt in the firmware telling the Linux kernel
otherwise when queried. Also, I see no indication of any slowness until
sometime after reboot, so I have no way of accessing BIOS to test and
John Hearns wrote:
> On Wed, 2005-07-20 at 09:48 -0400, Bill Wichser wrote:
>>By accident I discovered that of these 128 nodes, 50 of them show some
>>strange value in /proc/cpuinfo for model name. On a good node these
>>reveal themselves as "Intel(R) Pentium(R) 4 CPU 2.40GHz" while on a
>>"bad" node they call themselves "00/02" yet when checking the BIOS, and
>>all the nodes have the same configuration I believe although I neglected
>>to gather the level this last go round, they reveal themselves correctly
>>as Intel(R) Pentium(R) 4 CPU 2.40GHz.
> Jumping in with both feet,
> could you try running Dave Jones' x86info on good/bad nodes?
> Also does the bogomips rating differ (that's a real stupid question, I
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