On Thu, 2 Oct 2008, Howard Chu wrote:Thomas Gleixner wrote:On Tue, 30 Sep 2008, Howard Chu wrote:I only started paying attention recently. 2.6.27-rc4 thru rc7 for sure. I'm
More often than not, on a warm boot I see something like thisHmm, strange. Which kernel version ?
msg.new:[ 1.940031] Using local APIC timer interrupts.
msg.new:[ 1.944031] APIC timer calibration result 466046
msg.new:[ 1.944031] Detected 0.466 MHz APIC timer.
msg.new:[ 1.944031] APIC frequency too slow, disabling apic timer
On cold boots it may see 12.5MHz, or may not...
[ 2.000584] Using local APIC timer interrupts.
[ 2.004067] APIC timer calibration result 12500236
[ 2.004080] Detected 12.500 MHz APIC timer.
I haven't figured out yet what the pattern is behind the behavior. Has
anyone
else seen this kind of problem before?
running rc7 right now, that's what those log snippets are from.
Ok. Can you please add apic=verbose to the kernel command line so we
get more detailed info about that ?