enabling hyperthreading in PE 1750
rdiaz at cnio.es
Fri Oct 17 06:07:01 CDT 2003
We have two Poweredges 1750; each has 2 Xeon's (3.00 GHz) and 4 GB RAM; in the
BIOS, hyperthreading is enabled. However, we are having a hard time getting
hyperthreading to work:
- When we use the prebuilt ISO for Debian
(http://gustavo.imente.com/debian/bootbf2.4.21-ac4-4.iso) we only see two
processors listed in /proc/cpuinfo.
- If we use the 2.4.22-1-686-smp kernel from Debian testing (sarge), we again
only see two processors.
- However, if we boot using Cluster Knoppix (http://bofh.be/clusterknoppix/),
v.3.2 (2003-06-06), we do see the 4 logical processors (though we only get
900 MB RAM, which, we guess, woul just require setting CONFIG_HIGHMEM4G=y).
[No, we can't install from ClusterKnoppix, because it does not see our SCSI
But we've been comparing the config files for the different kernels and don't
see where the difference is. We've also tried recompiling the kernel, and we
still don't see the 4 CPUs.
What are we doing wrong? (We've searched all the list archives, and it seems
that nobody else has had a similar problem; if anything, people wanted to
turn off hypterthreading).
Centro Nacional de Investigaciones Oncológicas (CNIO)
(Spanish National Cancer Center)
Melchor Fernández Almagro, 3
28029 Madrid (Spain)
PGP KeyID: 0xE89B3462
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