Laszlo, What sometimes helps is additional kernel command line parameters, namely acpi=off (maybe you wouldn't have to disable the PM settings in the BIOS if you had this) and noapic, also there is the clocksource=tsc parameter which should make TSC the preferred clock source (that's if it's operational). This all depends on your kernel version as well.
My experience is that the TSC sync issues were mostly an AMD thing and some CPU / chipset generations ago, and anything modern should behave correctly - but clearly the Atom doesn't. Perhaps some platforms are just not meant for timing - some googling shows a lot of Atom D510 results showing TSC clock source not starting. The problem with writing the TSC is that it's a moving target that gets incremented with every CPU tick. It is writable with the wrmsr (0x10) instruction, and there's a write_tsc macro defined in asm/msr.h that does exactly that, but you also need to send it to the right core. One thing worth mentioning though is that issues like this can sometimes be resolved with a BIOS upgrade - always worth a try. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
