Messages in this thread | | | Date | Tue, 19 Feb 2002 12:23:46 -0800 | From | "H. Peter Anvin" <> | Subject | Re: Missed jiffies |
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Pavel Machek wrote:
> Hi! > > >>>lap tops), is the fact that TSC is NOT clocked at a fixed rate. It is >>>affected by throttling (reduced in 12.5% increments) and by power >>>management. >>> >>If the TSC is affected by HLT, throttling, or C2 power management, the >>TSC is broken (as it is on Cyrix chips, for example.) The TSC usually >>*is* affected by C3 power management, but the OS should be aware of >>C3. >> > > Add thinkpad 560X (pentium/MMX) and toshiba 4030cdt (celeron) to your > blacklist, then. I believe that by your definition *many* sstems are > broken. > Pavel
It's sad but true. Unfortunately the TSC seems to be considered a low-priority operation. It's for systems like the above you need the "no-tsc" option.
-hpa
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