Messages in this thread | | | Subject | Re: [PATCH] x86-64 highres/dyntick support | From | Thomas Gleixner <> | Date | Mon, 14 May 2007 08:33:04 +0200 |
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Alistair,
On Mon, 2007-05-14 at 02:17 +0100, Alistair John Strachan wrote: > I've noticed a few problems with this patch series, which I manually (without > difficulty) ported to 2.6.22-rc1.
There are a couple of fixups pending. I'm going to push out a new queue today.
> Only 195 timer interrupts? I only see this on an AMD Opteron, it doesn't occur > on an Intel Core 2 Duo. Mainline reports this counter regularly increasing > with or without the acpi_pm clocksource loaded.
We stop the PIT when we switch to the local APICs. On your Intel box you might have deeper C-states which switch the system back to broadcast mode via PIT.
> Secondly, /proc/cpuinfo seems to be broken: > > alistair@damocles:~$ cat /proc/cpuinfo | grep MHz > cpu MHz : 210779.550 > cpu MHz : 210779.550 > > Unless my CPU is just under 80 times faster than it used to be, these numbers > are incorrect. I expect 2700.50, or something similar. cpufreq isn't compiled > in.
Hmm. It seems the new TSC calibration routine is hosed.
> Finally, and possibly related, the dmesg timestamps seem to be totally broken. > Apparently my machine booted in less than 1 second, with the last messages > as: > > [ 0.607862] bridge: topology change detected, propagating > [ 0.607862] bridge: port 2(lan-sky) entering forwarding state > [ 0.830472] Linux agpgart interface v0.102 (c) Dave Jones
Hey, you have a really fast box :)
tglx
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