Hi Takashi, Thanks for your reply.
> Did you enable HPET? Hmm, it seems so... I configured my kernel using the debian .config as oldconfig. $ grep HPET /boot/config-2.6.10-ck2-pentium4 CONFIG_HPET_TIMER=y CONFIG_HPET=y # CONFIG_HPET_RTC_IRQ is not set CONFIG_HPET_MMAP=y > When hpet timer is enabled, it disables RTC interrupts. Ah, even when CONFIG_HPET_RTC_IRQ is not set?? > Even worse, it disables RTC irq even if HPET is not > detected from BIOS but only compiled. I see... Ok, I will recompile my kernel with HPET disabled. But maybe a HPET version of the latencytest would be nice, especially since: "The High Precision Event Timer (HPET) hardware is the future replacement for the 8254 and Real Time Clock (RTC) periodic timer functionality." maarten
