From: Nick Piggin <piggin@cyberone.com.au>
To: Mark Wong <markw@osdl.org>
Cc: Andrew Morton <akpm@osdl.org>,
axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: 2.6.4-mm2
Date: Sat, 20 Mar 2004 14:52:35 +1100 [thread overview]
Message-ID: <405BC003.6080507@cyberone.com.au> (raw)
In-Reply-To: <20040319185345.A4610@osdlab.pdx.osdl.net>
Mark Wong wrote:
>On Fri, Mar 19, 2004 at 06:50:26PM -0800, Andrew Morton wrote:
>
>>Mark Wong <markw@osdl.org> wrote:
>>
>>>On Thu, Mar 18, 2004 at 07:41:50PM -0800, Andrew Morton wrote:
>>>
>>>>Andrew Morton <akpm@osdl.org> wrote:
>>>>
>>>>>Mark, if it's OK I'll run up some kernels for you to test.
>>>>>
>>>>At
>>>>
>>>> http://www.zip.com.au/~akpm/linux/patches/markw/
>>>>
>>>Ok, looks like I take the first hit with the 02 patch. Here's re-summary:
>>>
>>>kernel 16 kb 32 kb 64 kb 128 kb 256 kb 512 kb
>>>2.6.3 2308 2335 2348 2334
>>>2.6.4-mm2 2028 2048 2074 2096 2082 2078
>>>2.6.5-rc1-01 2394
>>>2.6.5-rc1-02 2117
>>>2.6.5-rc1-mm2 2036
>>>
>>Thanks, so it's the CPU scheduler changes. Is that machine hyperthreaded?
>>And do you have CONFIG_X86_HT enabled?
>>
>
>Yes and CONFIG_X86_HT is enabled but I have hyperthreading disabled with
>'acpi=off noht' (whichever one does it.)
>
The oprofile for the 01 kernel says
CPU: P4 / Xeon, speed 1497.76 MHz (estimated)
while the 02 kernel says
CPU: P4 / Xeon with 2 hyper-threads, speed 1497.57 MHz (estimated)
What's going on there?
Other than that, nothing in the kernel profile jumps out at me:
schedule, __copy_from_user_ll and __copy_to_user_ll are all
significantly lower *after* the CPU scheduler changes, which
is an indicator that cache behaviour is better.
Sar says average context switches/second were 9064 and 6567 before
and after.
The only thing I can see is the CPU utilisation averages show the
scheduler patches have more of a tendancy to load up one CPU more
before moving to another. This actually should be good behaviour,
generally but I wonder if it is hurting at all. I would be really
surprised if it was that significant.
next prev parent reply other threads:[~2004-03-20 3:52 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-15 1:28 2.6.4-mm2 Andrew Morton
2004-03-15 1:57 ` 2.6.4-mm2 Joshua Kwan
2004-03-15 6:08 ` 2.6.4-mm2 Sam Ravnborg
2004-03-15 9:32 ` [patch] 2.6.4-mm2: ALSA au88x0.c doesn't compile with gcc 2.95 Adrian Bunk
2004-03-15 9:36 ` 2.6.4-mm2: ALSA au88{1,2}0: multiply defined symbols Adrian Bunk
2004-03-15 18:54 ` 2.6.4-mm2 Sam Ravnborg
2004-03-20 22:50 ` 2.6.4-mm2 Olaf Hering
2004-03-15 19:18 ` 2.6.4-mm2 (compile stats) John Cherry
2004-03-15 20:57 ` 2.6.4-mm2 Thomas Schlichter
2004-03-15 21:08 ` 2.6.4-mm2 Thomas Schlichter
2004-03-15 21:18 ` 2.6.4-mm2 Andrew Morton
2004-03-15 21:18 ` 2.6.4-mm2 Jens Axboe
2004-03-15 22:40 ` 2.6.4-mm2 Thomas Schlichter
2004-03-15 22:11 ` 2.6.4-mm2 Jesse Barnes
2004-03-16 18:32 ` 2.6.4-mm2 Daniel McNeil
2004-03-16 21:58 ` 2.6.4-mm2 Chris Mason
2004-03-16 23:21 ` 2.6.4-mm2 Andrew Morton
2004-03-16 23:28 ` 2.6.4-mm2 Andrew Morton
2004-03-16 23:39 ` 2.6.4-mm2 Andrew Morton
2004-03-17 0:10 ` 2.6.4-mm2 Daniel McNeil
[not found] ` <1079485055.4181.1115.camel@watt.suse.com>
[not found] ` <1079487710.3100.22.camel@ibm-c.pdx.osdl.net>
[not found] ` <20040316180043.441e8150.akpm@osdl.org>
2004-03-17 20:11 ` 2.6.4-mm2 Chris Mason
2004-03-17 20:33 ` 2.6.4-mm2 Andrew Morton
2004-03-17 22:46 ` 2.6.4-mm2 Chris Mason
2004-03-17 23:09 ` 2.6.4-mm2 Andrew Morton
2004-03-17 23:27 ` 2.6.4-mm2 Chris Mason
2004-03-17 23:51 ` 2.6.4-mm2 Andrew Morton
2004-03-18 0:06 ` 2.6.4-mm2 Chris Mason
2004-03-18 0:13 ` 2.6.4-mm2 Andrew Morton
2004-03-18 0:31 ` 2.6.4-mm2 Chris Mason
2004-03-18 0:33 ` 2.6.4-mm2 Andrew Morton
2004-03-18 0:41 ` 2.6.4-mm2 Chris Mason
2004-03-18 1:15 ` 2.6.4-mm2 Daniel McNeil
2004-03-18 17:53 ` 2.6.4-mm2 Daniel McNeil
2004-03-18 18:47 ` 2.6.4-mm2 Chris Mason
2004-03-18 19:10 ` 2.6.4-mm2 Daniel McNeil
2004-03-19 16:49 ` 2.6.5-rc2-mm2 and direct_read_under Daniel McNeil
2004-03-19 17:05 ` 2.6.5-rc1-mm2 " Daniel McNeil
2004-03-21 14:36 ` Chris Mason
2004-03-22 18:10 ` 2.6.5-rc1-mm2 and direct_read_under and wb Daniel McNeil
2004-03-22 18:23 ` Chris Mason
2004-03-22 18:27 ` Chris Mason
2004-03-22 18:35 ` Chris Mason
2004-03-22 18:51 ` Daniel McNeil
2004-03-22 23:13 ` Andrew Morton
2004-03-23 0:51 ` Daniel McNeil
2004-03-23 9:25 ` Andrew Morton
2004-03-23 17:05 ` Daniel McNeil
2004-03-23 17:59 ` Andrew Morton
2004-03-23 21:38 ` Daniel McNeil
2004-03-23 21:47 ` Andrew Morton
2004-03-18 17:37 ` 2.6.4-mm2 markw
2004-03-18 18:06 ` 2.6.4-mm2 Andrew Morton
2004-03-18 18:48 ` 2.6.4-mm2 markw
2004-03-18 19:10 ` 2.6.4-mm2 Chris Mason
2004-03-18 19:27 ` 2.6.4-mm2 Jens Axboe
2004-03-18 23:38 ` 2.6.4-mm2 markw
2004-03-19 7:39 ` 2.6.4-mm2 Jens Axboe
2004-03-19 3:15 ` 2.6.4-mm2 Andrew Morton
2004-03-19 7:39 ` 2.6.4-mm2 Jens Axboe
2004-03-19 7:52 ` 2.6.4-mm2 Andrew Morton
2004-03-19 7:57 ` 2.6.4-mm2 Jens Axboe
2004-03-19 8:19 ` 2.6.4-mm2 Andrew Morton
2004-03-19 8:31 ` 2.6.4-mm2 Jens Axboe
2004-03-19 8:39 ` 2.6.4-mm2 Andrew Morton
2004-03-19 8:48 ` 2.6.4-mm2 Jens Axboe
2004-03-19 9:56 ` 2.6.4-mm2 Miquel van Smoorenburg
2004-03-19 10:00 ` 2.6.4-mm2 Jens Axboe
[not found] ` <20040318194150.4de65049.akpm@osdl.org>
2004-03-20 2:39 ` 2.6.4-mm2 Mark Wong
2004-03-20 2:47 ` 2.6.4-mm2 Mark Wong
2004-03-20 2:50 ` 2.6.4-mm2 Andrew Morton
2004-03-20 2:53 ` 2.6.4-mm2 Mark Wong
2004-03-20 3:52 ` Nick Piggin [this message]
2004-03-20 4:14 ` 2.6.4-mm2 Andrew Morton
2004-03-20 4:24 ` 2.6.4-mm2 Nick Piggin
2004-03-20 4:26 ` 2.6.4-mm2 Nick Piggin
2004-03-20 21:17 ` 2.6.4-mm2 Martin J. Bligh
2004-03-22 17:19 ` 2.6.4-mm2 Mary Edie Meredith
2004-03-23 0:27 ` 2.6.4-mm2 Andrew Morton
2004-03-23 19:21 ` 2.6.4-mm2 Mary Edie Meredith
2004-03-23 19:32 ` 2.6.4-mm2 Andrew Morton
2004-03-24 0:07 ` 2.6.4-mm2 Mary Edie Meredith
2004-03-30 21:30 ` 2.6.4-mm2 Mary Edie Meredith
[not found] <A6974D8E5F98D511BB910002A50A6647615F5E26@hdsmsx402.hd.intel.com>
2004-03-20 4:19 ` 2.6.4-mm2 Len Brown
2004-03-20 4:26 ` 2.6.4-mm2 Andrew Morton
2004-03-20 4:32 ` 2.6.4-mm2 Mark Wong
[not found] <A6974D8E5F98D511BB910002A50A6647615F5E2B@hdsmsx402.hd.intel.com>
2004-03-20 4:27 ` 2.6.4-mm2 Len Brown
2004-03-20 9:01 ` 2.6.4-mm2 Nick Piggin
2004-03-22 16:24 ` 2.6.4-mm2 markw
-- strict thread matches above, loose matches on Subject: below --
2004-03-20 23:12 2.6.4-mm2 sam
2004-03-20 23:41 ` 2.6.4-mm2 Olaf Hering
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