Messages in this thread | | | Subject | Re: Downsides to madvise/fadvise(willneed) for application startup | From | Andi Kleen <> | Date | Mon, 12 Apr 2010 10:50:57 +0200 |
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Taras Glek <tglek@mozilla.com> writes:
> Hello, > I am working on improving Mozilla startup times. It turns out that > page faults(caused by lack of cooperation between user/kernelspace) > are the main cause of slow startup. I need some insights from someone > who understands linux vm behavior.
I have an older patch to create dynamic bitmaps based on the last run and only prefetch those pages.
It wasn't entirely a win for everything and didn't work for shared libraries, but with some additional tuning the approach still has potential I think, by combining memory saving with prefetching.
ftp://firstfloor.org/pub/ak/pbitmap/INTRO http://halobates.de/dp2.pdf
For your use case the algorithm would likely need some glibc support.
-Andi
-- ak@linux.intel.com -- Speaking for myself only.
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