Messages in this thread | | | Date | Sat, 27 Nov 2004 06:19:40 -0200 | From | Marcelo Tosatti <> | Subject | Re: [PATCH]: 1/4 batch mark_page_accessed() |
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On Sat, Nov 27, 2004 at 01:41:58PM +0300, Nikita Danilov wrote: > Marcelo Tosatti writes: > > [...] > > > > > Average Half Load -j 4 Run: Average Half Load -j 4 Run: > > Elapsed Time 274.916 Elapsed Time 245.026 > > User Time 833.63 User Time 832.34 > > System Time 73.704 System Time 73.41 > > Percent CPU 335.8 Percent CPU 373.6 > > Context Switches 12984.8 Context Switches 13427.4 > > Sleeps 21459.2 Sleeps 21642 > > What is "System Time" here? Does in include CPU consumption by, say, > kswapd?
I dont think "System Time" counts for kswapd - but only time spent inside the kernel, including page reclamation efforts.
> If not, then one may conjecture that mark_page_accessed batching > modifies ordering of pages on zone "LRU" lists in a way that measurably > changes efficiency of VM scanning, and mostly affects process that scans > most---kswapd.
I agree. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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