Messages in this thread | | | Date | Mon, 26 Jul 2004 17:43:12 +0200 | From | Rudo Thomas <> | Subject | Re: preempt timing violations (unmap_vmas) |
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Hello.
> > 2ms non-preemptible critical section violated 1 ms preempt threshold > > starting at unmap_vmas+0x1ff/0x210 and ending at > > unmap_vmas+0x1f5/0x210 > > this is the normal sys_exit()->exit_mmap()->unmap_vmas() path. It's > weird that it generated a 2ms latency. What are the values of > voluntary_preemption and kernel_preemption on your current kernel? With > a 2:0 setting we ought to have a reschedule point every 32 pages. Do > you know which application triggers this latency and is it easy to > reproduce?
I discovered that I got two of these in a row. The settings are 2:1, but I am not able to reproduce it.
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