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> Hmmm, we just got a Dell 1600SC with single 2GHz Xeon HT, and it shows > only one CPU (in /proc/cpuinfo) when booted on the current updated smp > kernel. Should /proc/cpuinfo show twice the number of instlled > processors if HT works? > > Mark, did you resolve this? > > Regards, > Buchan You need to have the 'logical processor support' thing enabled in the Dell's BIOS in order for HT to be available to you. I've also noticed that you need to boot with ACPI=on (or remove it from lilo.conf) so that the processor enumeration code finds the HT siblings. I'm not 100% sure if I tried enabling ACPI on the latest enterprise kernel - at the time I was more interested in the IRQ balancing issues (I wasn't getting any). The servers I have are Dell 2650's and with the 2.4.21-rc6-ac2 kernel and ACPI enabled, I get HT (so 4 processors in /proc/cpuinfo) and /proc/interupts is showing a nicely balanced system. kernel-enterprise-2.4.21.0.18mdk was not showing any of these as working. If I get a chance to reboot the server in question, I'll recheck the enterprise kernel with ACPI. Mark. - -- Mark Watts Senior Systems Engineer QinetiQ TIM St Andrews Road, Malvern GPG Public Key ID: 455420ED -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+9vrpBn4EFUVUIO0RAnyIAKCxGDTGgAWtcSKILCRTVgqMIg3HvACg5aJh ZhIAqNEx4iIbLlZhWf8+8SI= =G2oi -----END PGP SIGNATURE-----
