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    SubjectRe: [PATCH] lockstat: contend with points
    On Fri, Oct 17, 2008 at 1:18 AM, Peter Zijlstra <peterz@infradead.org> wrote:
    > +06 &mm->mmap_sem-W: 233 538 18446744073708 22924.27 607243.51 1342 45806 1.71 8595.89 1180582.34
    > +07 &mm->mmap_sem-R: 205 587 18446744073708 28403.36 731975.00 1940 412426 0.58 187825.45 6307502.88
    > +08 ---------------
    > +09 &mm->mmap_sem 487 [<ffffffff8053491f>] do_page_fault+0x466/0x928
    > +10 &mm->mmap_sem 179 [<ffffffff802a6200>] sys_mprotect+0xcd/0x21d
    > +11 &mm->mmap_sem 279 [<ffffffff80210a57>] sys_mmap+0x75/0xce
    > +12 &mm->mmap_sem 76 [<ffffffff802a490b>] sys_munmap+0x32/0x59
    > +13 ---------------
    > +14 &mm->mmap_sem 270 [<ffffffff80210a57>] sys_mmap+0x75/0xce
    > +15 &mm->mmap_sem 431 [<ffffffff8053491f>] do_page_fault+0x466/0x928
    > +16 &mm->mmap_sem 138 [<ffffffff802a490b>] sys_munmap+0x32/0x59
    > +17 &mm->mmap_sem 145 [<ffffffff802a6200>] sys_mprotect+0xcd/0x21d
    > +18
    > +19 ...............................................................................................................................................................................................
    > +20
    > +21 dcache_lock: 621 623 0.52 118.26 1053.02 6745 91930 0.29 316.29 118423.41
    > +22 -----------
    > +23 dcache_lock 179 [<ffffffff80378274>] _atomic_dec_and_lock+0x34/0x54
    > +24 dcache_lock 113 [<ffffffff802cc17b>] d_alloc+0x19a/0x1eb
    > +25 dcache_lock 99 [<ffffffff802ca0dc>] d_rehash+0x1b/0x44
    > +26 dcache_lock 104 [<ffffffff802cbca0>] d_instantiate+0x36/0x8a
    > +27 -----------
    > +28 dcache_lock 192 [<ffffffff80378274>] _atomic_dec_and_lock+0x34/0x54
    > +29 dcache_lock 98 [<ffffffff802ca0dc>] d_rehash+0x1b/0x44
    > +30 dcache_lock 72 [<ffffffff802cc17b>] d_alloc+0x19a/0x1eb
    > +31 dcache_lock 112 [<ffffffff802cbca0>] d_instantiate+0x36/0x8a



    Just out of curiousity...what was running as you collected these?


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