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    SubjectRe: objrmap and vmtruncate
    "Martin J. Bligh" <mbligh@aracnet.com> wrote:
    >
    > > The first test has 100 tasks, each of which has 100 vma's. The 100 processes
    > > modify their 100 vma's in a linear walk. Total working set is 240MB
    > > (slightly more than is available).
    > >
    > > ./rmap-test -l -i 10 -n 100 -s 600 -t 100 foo
    > >
    > > 2.5.66-mm4:
    > > 15.76s user 86.91s system 33% cpu 5:05.07 total
    > > 2.5.66-mm4+objrmap:
    > > 23.07s user 1143.26s system 87% cpu 22:09.81 total
    > > 2.4.21-pre5aa2:
    > > 14.91s user 75.30s system 24% cpu 6:15.84 total
    >
    > Isn't the intent to use sys_remap_file_pages for these sort of workloads
    > anyway? In which case partial objrmap = rmap for these tests, so we're
    > still OK?
    >

    remap_file_pages() would work OK for this, yes. Bit sad that an application
    which runs OK on 2.4 would need recoding to work acceptably under 2.5 though.
    -
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