Messages in this thread |  | | Subject | Re: [PATCH] tsc-disable_B9 | From | Alan Cox <> | Date | 16 Aug 2002 12:15:59 +0100 |
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On Thu, 2002-08-15 at 17:56, Andrea Arcangeli wrote: > sorry but I don't see the point of badtsc only in kernel. > > If the TSC is bad that will be in particular bad from userspace where > there's no hope to know what CPU you're running on.
You can still do meaningful measurements for things like profiling because the cpu hop is statistically uninteresting.
> How do you detect the NUMA hw? That would be a nice addition so the > numa-Q users won't be required to add notsc to the append lilo line.
The current Summit patches from IBM (the ones James did and merged in -ac) do detection for Numa-Q and Summit. Those are pending for Marcelo right now so if you have a better way I'd like to know.
Alan
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