From: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Kay Sievers <kay.sievers@vrfy.org>,
Greg Kroah-Hartman <gregkh@suse.de>,
LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
Subject: Re: hackbench regression since 2.6.25-rc
Date: Fri, 14 Mar 2008 11:30:47 +0800 [thread overview]
Message-ID: <1205465447.3215.195.camel@ymzhang> (raw)
In-Reply-To: <1205463842.3215.188.camel@ymzhang>
On Fri, 2008-03-14 at 11:04 +0800, Zhang, Yanmin wrote:
> On Thu, 2008-03-13 at 17:16 -0700, Christoph Lameter wrote:
> > Could you recompile the kernel with slub performance statistics and post
> > the output of
> >
> > slabinfo -AD
> Before testing with kernel 2.6.25-rc5:
> Name Objects Alloc Free %Fast
> vm_area_struct 2795 135185 132587 93 29
> :0004096 25 119045 119043 99 98
> :0000064 12257 119671 107742 98 50
> :0000192 3312 78563 75370 92 21
> :0000128 4648 48143 43738 97 53
> dentry 15217 46675 31527 95 72
> :0000080 12784 33674 21206 99 97
> :0000016 4367 25871 23705 99 78
> :0000096 3001 22591 20084 99 92
> buffer_head 5536 18147 12884 97 42
> anon_vma 1729 14948 14130 99 73
>
>
> After testing:
> Name Objects Alloc Free %Fast
> :0000192 3428 80093958 80090708 92 8
> :0000512 374 80016030 80015715 68 7
> vm_area_struct 2875 224524 221868 94 20
> :0000064 12408 134273 122227 98 47
> :0004096 24 127397 127395 99 98
> :0000128 4596 57837 53432 97 48
> dentry 15659 51402 35824 95 64
> :0000016 4584 29327 27161 99 76
> :0000080 12784 33674 21206 99 97
> :0000096 2998 26264 23757 99 93
>
>
> So block 192 and 512's and very active and their fast free percentage is low.
On my 8-core stoakley, there is no such regression. Below data is after testing.
[root@lkp-st02-x8664 ~]# slabinfo -AD
Name Objects Alloc Free %Fast
:0000192 3170 80055388 80052280 92 1
:0000512 316 80012750 80012466 69 1
vm_area_struct 2642 194700 192193 94 16
:0000064 3846 74468 70820 97 53
:0004096 15 69014 69012 98 97
:0000128 1447 32920 31541 91 8
dentry 13485 33060 19652 92 42
:0000080 10639 23377 12953 98 98
:0000096 1662 16496 15036 99 94
:0000832 232 14422 14203 85 10
:0000016 2733 15102 13372 99 14
So the block 192 and 512's fast free percentage is even smaller than the ones on tigerton.
Oprofile data on stoakley:
CPU: Core 2, speed 2660 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask of 0x00 (Unhalted core cycles) count 100000
samples % app name symbol name
2897265 25.7603 linux-2.6.25-rc5 __slab_alloc
2689900 23.9166 linux-2.6.25-rc5 add_partial
629355 5.5957 linux-2.6.25-rc5 copy_user_generic_string
552309 4.9107 linux-2.6.25-rc5 __slab_free
514792 4.5771 linux-2.6.25-rc5 sock_alloc_send_skb
500879 4.4534 linux-2.6.25-rc5 unix_stream_recvmsg
274798 2.4433 linux-2.6.25-rc5 __kmalloc_track_caller
230283 2.0475 linux-2.6.25-rc5 kfree
222286 1.9764 linux-2.6.25-rc5 unix_stream_sendmsg
217413 1.9331 linux-2.6.25-rc5 memset_c
211589 1.8813 linux-2.6.25-rc5 kmem_cache_alloc
151500 1.3470 linux-2.6.25-rc5 system_call
132262 1.1760 linux-2.6.25-rc5 sock_def_readable
123130 1.0948 linux-2.6.25-rc5 kmem_cache_free
109518 0.9738 linux-2.6.25-rc5 sock_wfree
yanmin
next prev parent reply other threads:[~2008-03-14 3:33 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-13 7:46 Zhang, Yanmin
2008-03-13 8:48 ` Andrew Morton
2008-03-13 9:28 ` Zhang, Yanmin
2008-03-13 9:52 ` Andrew Morton
2008-03-14 0:16 ` Christoph Lameter
2008-03-14 3:04 ` Zhang, Yanmin
2008-03-14 3:30 ` Zhang, Yanmin [this message]
2008-03-14 5:28 ` Zhang, Yanmin
2008-03-14 6:39 ` Christoph Lameter
2008-03-14 7:29 ` Zhang, Yanmin
2008-03-14 21:05 ` Christoph Lameter
2008-03-14 6:34 ` Christoph Lameter
2008-03-14 7:23 ` Zhang, Yanmin
2008-03-14 21:06 ` Christoph Lameter
2008-03-17 7:50 ` Zhang, Yanmin
2008-03-17 17:32 ` Christoph Lameter
2008-03-18 3:28 ` Zhang, Yanmin
2008-03-18 4:07 ` Christoph Lameter
2008-03-14 6:32 ` Christoph Lameter
2008-03-14 7:14 ` Zhang, Yanmin
2008-03-14 21:08 ` Christoph Lameter
2008-03-15 0:15 ` Christoph Lameter
2008-03-17 3:35 ` Zhang, Yanmin
2008-03-17 17:27 ` Christoph Lameter
2008-03-17 3:05 ` Zhang, Yanmin
2008-03-13 15:14 ` Greg KH
2008-03-13 16:19 ` Randy Dunlap
2008-03-13 17:12 ` Greg KH
2008-03-14 0:50 ` Zhang, Yanmin
2008-03-14 5:01 ` Greg KH
2008-03-14 5:32 ` Zhang, Yanmin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1205465447.3215.195.camel@ymzhang \
--to=yanmin_zhang@linux.intel.com \
--cc=akpm@linux-foundation.org \
--cc=clameter@sgi.com \
--cc=gregkh@suse.de \
--cc=kay.sievers@vrfy.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome