Re: [Re: paging behavior in Linux]
Manfred Spraul (email@example.com)
Fri, 02 Mar 2001 21:23:31 +0100
Neelam Saboo wrote:
> After I installed a newer version of Kernel (2.4.2) and enable DMA option in
> hardware configuration, the behavior changes.
> I can see performance improvements when another thread is used. Also, i can
> see timing overlaps between two threads. i.e. when one thread is blocked on a
> page fault, other thread keeps working.
> Now, how can this behavior be explained , given the earlier argument.
> Is it that, a newer version of kernel has fixed the problem of the semaphore
No, that change won't happen until 2.5
I can only guess:
the other thread keeps working until it causes a page fault - with both
2.4.1 and 2.4.2.
I haven't followed the threads about the mm changes closely, but I
assume that the swapout behaviour changed, and that your worker thread
now runs without causing page faults.
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