From: William Lee Irwin III <wli@holomorphy.com>
To: Nick Piggin <piggin@cyberone.com.au>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Rusty Russell <rusty@rustcorp.com.au>,
Anton Blanchard <anton@samba.org>,
"Martin J. Bligh" <mbligh@aracnet.com>,
"Nakajima, Jun" <jun.nakajima@intel.com>,
Mark Wong <markw@osdl.org>
Subject: Re: [CFT][RFC] HT scheduler
Date: Thu, 11 Dec 2003 05:23:01 -0800 [thread overview]
Message-ID: <20031211132301.GD8039@holomorphy.com> (raw)
In-Reply-To: <3FD86C70.5000408@cyberone.com.au>
William Lee Irwin III wrote:
>> If this thing is heavily threaded, it could be mm->page_table_lock.
On Fri, Dec 12, 2003 at 12:09:04AM +1100, Nick Piggin wrote:
> I'm not sure how threaded it is, probably very. Would inline spinlocks
> help show up mm->page_table_lock?
> It really looks like .text.lock.futex though, doesn't it? Would that be
> the hashed futex locks? I wonder why it suddenly goes downhill past about
> 140 rooms though.
It will get contention anyway if they're all pounding on the same futex.
OTOH, if they're all threads in the same process, they can hit other
problems. I'll try to find out more about hackbench.
-- wli
next prev parent reply other threads:[~2003-12-11 13:23 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-08 4:25 [PATCH][RFC] make cpu_sibling_map a cpumask_t Nick Piggin
2003-12-08 15:59 ` Anton Blanchard
2003-12-08 23:08 ` Nick Piggin
2003-12-09 0:14 ` Anton Blanchard
2003-12-11 4:25 ` [CFT][RFC] HT scheduler Nick Piggin
2003-12-11 7:24 ` Nick Piggin
2003-12-11 8:57 ` Nick Piggin
2003-12-11 11:52 ` William Lee Irwin III
2003-12-11 13:09 ` Nick Piggin
2003-12-11 13:23 ` William Lee Irwin III [this message]
2003-12-11 13:30 ` Nick Piggin
2003-12-11 13:32 ` William Lee Irwin III
2003-12-11 15:30 ` Nick Piggin
2003-12-11 15:38 ` William Lee Irwin III
2003-12-11 15:51 ` Nick Piggin
2003-12-11 15:56 ` William Lee Irwin III
2003-12-11 16:37 ` Nick Piggin
2003-12-11 16:40 ` William Lee Irwin III
2003-12-12 1:52 ` [PATCH] improve rwsem scalability (was Re: [CFT][RFC] HT scheduler) Nick Piggin
2003-12-12 2:02 ` Nick Piggin
2003-12-12 9:41 ` Ingo Molnar
2003-12-13 0:07 ` Nick Piggin
2003-12-14 0:44 ` Nick Piggin
2003-12-17 5:27 ` Nick Piggin
2003-12-19 11:52 ` Nick Piggin
2003-12-19 15:06 ` Martin J. Bligh
2003-12-20 0:08 ` Nick Piggin
2003-12-12 0:58 ` [CFT][RFC] HT scheduler Rusty Russell
2003-12-11 10:01 ` Rhino
2003-12-11 8:14 ` Nick Piggin
2003-12-11 16:49 ` Rhino
2003-12-11 15:16 ` Nick Piggin
2003-12-11 11:40 ` William Lee Irwin III
2003-12-11 17:05 ` Rhino
2003-12-11 15:17 ` William Lee Irwin III
2003-12-11 16:28 ` Kevin P. Fleming
2003-12-11 16:41 ` Nick Piggin
2003-12-12 2:24 ` Rusty Russell
2003-12-12 7:00 ` Nick Piggin
2003-12-12 7:23 ` Rusty Russell
2003-12-13 6:43 ` Nick Piggin
2003-12-14 1:35 ` bill davidsen
2003-12-14 2:18 ` Nick Piggin
2003-12-14 4:32 ` Jamie Lokier
2003-12-14 9:40 ` Nick Piggin
2003-12-14 10:46 ` Arjan van de Ven
2003-12-16 17:46 ` Bill Davidsen
2003-12-16 18:22 ` Linus Torvalds
2003-12-17 0:24 ` Davide Libenzi
2003-12-17 0:41 ` Linus Torvalds
2003-12-17 0:54 ` Davide Libenzi
2003-12-16 17:34 ` Bill Davidsen
2003-12-15 5:53 ` Rusty Russell
2003-12-15 23:08 ` Nick Piggin
2003-12-19 4:57 ` Nick Piggin
2003-12-19 5:13 ` Nick Piggin
2003-12-20 2:43 ` Rusty Russell
2003-12-21 2:56 ` Nick Piggin
2004-01-03 18:57 ` Bill Davidsen
2003-12-15 20:21 ` Zwane Mwaikambo
2003-12-15 23:20 ` Nick Piggin
2003-12-16 0:11 ` Zwane Mwaikambo
2003-12-12 8:59 ` Nick Piggin
2003-12-12 15:14 ` Martin J. Bligh
2003-12-08 19:44 ` [PATCH][RFC] make cpu_sibling_map a cpumask_t James Cleverdon
2003-12-08 20:38 ` Ingo Molnar
2003-12-08 20:51 ` Zwane Mwaikambo
2003-12-08 20:55 ` Ingo Molnar
2003-12-08 23:17 ` Nick Piggin
2003-12-08 23:36 ` Ingo Molnar
2003-12-08 23:58 ` Nick Piggin
2003-12-08 23:46 ` Rusty Russell
2003-12-09 13:36 ` Nick Piggin
2003-12-11 21:41 ` bill davidsen
[not found] <20031213022038.300B22C2C1@lists.samba.org.suse.lists.linux.kernel>
[not found] ` <3FDAB517.4000309@cyberone.com.au.suse.lists.linux.kernel>
[not found] ` <brgeo7$huv$1@gatekeeper.tmr.com.suse.lists.linux.kernel>
[not found] ` <3FDBC876.3020603@cyberone.com.au.suse.lists.linux.kernel>
[not found] ` <20031214043245.GC21241@mail.shareable.org.suse.lists.linux.kernel>
[not found] ` <3FDC3023.9030708@cyberone.com.au.suse.lists.linux.kernel>
[not found] ` <1071398761.5233.1.camel@laptop.fenrus.com.suse.lists.linux.kernel>
2003-12-14 16:26 ` [CFT][RFC] HT scheduler Andi Kleen
2003-12-14 16:54 ` Arjan van de Ven
[not found] <200312161127.13691.habanero@us.ibm.com>
2003-12-16 17:37 ` Andrew Theurer
2003-12-17 2:41 ` Nick Piggin
2003-12-16 19:03 Nakajima, Jun
2003-12-17 0:38 Nakajima, Jun
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