Messages in this thread | | | From | wind@cocodril ... | Date | Mon, 17 Mar 2003 17:52:23 +0100 | Subject | Re: 2.4 vm, program load, page faulting, ... |
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On Mon, Mar 17, 2003 at 11:01:31AM -0500, Rik van Riel wrote: > On Mon, 17 Mar 2003, William Lee Irwin III wrote: > > On Sat, 15 Mar 2003, Paul Albrecht wrote: > > >> ... Why does the kernel page fault on text pages, present in the page > > >> cache, when a program starts? Couldn't the pte's for text present in the > > >> page cache be resolved when they're mapped to memory? > > > > SVR4 did and saw an improvement wrt. page fault rate, according to > > Vahalia. > > An improvement in the _page fault rate_, well DUH. > > > I'd like to see whether this is useful for Linux. > > The question is, does it result in an improvement in the > run speed of processes... > > cheers, > > Rik
You should ask Andrew about his patch to do exactly that: he forced all PROC_EXEC mmaps to be nonlinear-mapped and this forced all programs to suck entire binaries into memory... I recall he saw at least 25% improvement at launching gnome.
Andrew?
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