[lkml]   [2010]   [Apr]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: Downsides to madvise/fadvise(willneed) for application startup
    Taras Glek <> 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.

    For your use case the algorithm would likely need some glibc support.


    -- -- Speaking for myself only.

     \ /
      Last update: 2010-04-12 10:53    [W:0.019 / U:102.092 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site