linux-kernel - Re: [PATCH] lockstat: contend with points

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Date:	Tue, 21 Oct 2008 15:59:16 -0700
From:	"Tim Pepper" <tpepper@...il.com>
To:	"Peter Zijlstra" <peterz@...radead.org>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Török Edwin" <edwintorok@...il.com>,
	"Steven Rostedt" <rostedt@...dmis.org>,
	"Bill Huey" <billh@...ppy.monkey.org>,
	"Arnaldo Carvalho de Melo" <acme@...stprotocols.net>
Subject: Re: [PATCH] lockstat: contend with points

On Fri, Oct 17, 2008 at 1:18 AM, Peter Zijlstra <peterz@...radead.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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