Messages in this thread | | | From | Jakub Jelinek <> | Subject | Re: bad lmbench numbers for mmap | Date | Sat, 17 Apr 1999 01:03:21 +0200 (CEST) |
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> > so what's up with mmap ?
Actually it seems like more than 90% of the time in this test is spent in munmap, particularly in filemap_sync. From quick looking at the sources, the only routine which changed there substantially is filemap_write_page, so it might well be because it waits for every dirtied page until it is stored to disk and in 2.1.103 did not do that. I'm too tired now to investigate further and actually think about it whether doing so is needed.
Cheers, Jakub ___________________________________________________________________ Jakub Jelinek | jj@sunsite.mff.cuni.cz | http://sunsite.mff.cuni.cz Administrator of SunSITE Czech Republic, MFF, Charles University ___________________________________________________________________ UltraLinux | http://ultra.linux.cz/ | http://ultra.penguin.cz/ Linux version 2.2.5 on a sparc64 machine (3958.37 BogoMips) ___________________________________________________________________
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