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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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