Messages in this thread | | | From | Nikita Danilov <> | Date | Sat, 27 Nov 2004 13:41:58 +0300 | Subject | Re: [PATCH]: 1/4 batch mark_page_accessed() |
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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? 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.
Nikita.
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