On Fri, Dec 09, 2005 at 03:06:16PM +0100, [EMAIL PROTECTED] wrote: > what is a TSC?
Time Stamp Counter or something like that. It is a counter in the cpu that can theoretically be used as a fast way to keep track of time. Most modern CPUs have one. Some count at full cpu clock rate, some count slower. Depends on the design. On multi cpu systems, they are often not in sync, but initially it was thought that dual core AMDs would have them in sync, but that isn't true apparently due to frequency scaling and power management stuff changing the counter speed. > what does the clock=pmtmr bootparam do? I think it changes what device the kernel uses to keep track of time. The is the power management timer, the hpet (high performance event timer), the TSC, and a few other choices. Some are faster to read, some are more accurate, and it all depends on the type of system which ones you can even rely on. > what is HPET_TIMER=y ? > what is PM_TIMER=y ? That would be the two I mentioned above. > and what is LKML? Linux Kernel Mailing List. See vger.kernel.org. Len Sorensen -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
