Re: [RT] read_tsc: ACK! TSC went backward! Unsynced TSCs?

thockin
2005-11-29T16:47:32Z

On Tue, Nov 29, 2005 at 07:06:24AM -0700, Andi Kleen wrote:
> But I'm surprised you're saying 2.6.11 broke. At least 2.6.11 64bit should
> have always used HPET in this case. I only broke it around 2.6.13
> where I added an overeager optimization for single socket DC on my side based
> on a misunderstanding. Earlier and later kernels should have been ok.

we didn't have HPET enabled in BIOS until recently. Turning that on made
all the TSC gettimeofday() crap disappear. Now to find and kill any
straggling users of rdtsc