Messages in this thread | ![/](/images/icornerl.gif) | | From | Jonathan Woithe <> | Subject | Re: 2.6.16-rt11: Hires timer makes sleep wait far too long | Date | Mon, 10 Apr 2006 16:57:33 +0930 (CST) |
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Thomas
> On Wed, 2006-04-05 at 09:51 +0930, Jonathan Woithe wrote: > > ENABLING IO-APIC IRQs > > ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 > > Event source pit new caps set: 05 > > Event source lapic installed with caps set: 02 > > : > > Time: tsc clocksource has been installed. > > hrtimers: Switched to high resolution mode CPU 0 > > : > > Time: acpi_pm clocksource has been installed. > > hrtimers: Switched to high resolution mode CPU 0 > > Nothing wrong so far. I have to find a test box with pm timer to get > some more info.
FYI, the same problem occurs in 2.6.16-rt12. I note that rt14 is out now so I'll give that a go overnight and let you know the results.
One final observation I did make under 2.6.16-rt12: in the first 30 seconds or there abouts after the boot, "sleep 1" did result in short sleeps - they weren't always 1 second, but they were in the ballpark. After the machine had been up for 30-60 seconds however, "sleep 1" would produce waits along the lines of what I reported in the initial report - anywhere between 20 seconds to 45 seconds and more. There didn't seem to be any gradual increase either - the "sleep 1" wait times seemed to jump from 1-2 seconds up to 20-30 seconds very suddenly.
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