From: Andrew Morton <akpm@digeo.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: mbligh@aracnet.com, habanero@us.ibm.com, efocht@ess.nec.de,
hohnbaum@us.ibm.com, colpatch@us.ibm.com, hch@infradead.org,
rml@tech9.net, torvalds@transmeta.com,
linux-kernel@vger.kernel.org, lse-tech@lists.sourceforge.net,
anton@samba.org, andrea@suse.de
Subject: Re: [patch] HT scheduler, sched-2.5.59-D7
Date: Mon, 20 Jan 2003 14:28:27 -0800 [thread overview]
Message-ID: <20030120142827.68c87059.akpm@digeo.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0301202204210.18235-100000@localhost.localdomain>
Ingo Molnar <mingo@elte.hu> wrote:
>
>
> the attached patch (against 2.5.59) is my current scheduler tree, it
> includes two main areas of changes:
>
> - interactivity improvements, mostly reworked bits from Andrea's tree and
> various tunings.
>
Thanks for doing this. Initial testing with one workload which is extremely
bad with 2.5.59: huge improvement.
The workload is:
workstation> ssh laptop
laptop> setenv DISPLAY workstation:0
laptop> make -j0 bzImage&
laptop> some-x-application &
For some reason, X-across-ethernet performs terribly when there's a kernel
compile on the client machine - lots of half-second lags.
All gone now.
wrt this:
if (SMART_WAKE_CHILD) {
if (unlikely(!current->array))
__activate_task(p, rq);
else {
p->prio = current->prio;
list_add_tail(&p->run_list, ¤t->run_list);
p->array = current->array;
p->array->nr_active++;
nr_running_inc(rq);
}
for some reason I decided that RT tasks need special handling here. I
forget why though ;) Please double-check that.
--- 25/kernel/sched.c~rcf-simple Thu Dec 26 02:34:11 2002
+++ 25-akpm/kernel/sched.c Thu Dec 26 02:34:40 2002
@@ -452,6 +452,8 @@ int wake_up_process(task_t * p)
void wake_up_forked_process(task_t * p)
{
runqueue_t *rq = this_rq_lock();
+ struct task_struct *this_task = current;
+ prio_array_t *array = this_task->array;
p->state = TASK_RUNNING;
if (!rt_task(p)) {
@@ -467,6 +469,19 @@ void wake_up_forked_process(task_t * p)
set_task_cpu(p, smp_processor_id());
activate_task(p, rq);
+ /*
+ * Take caller off the head of the runqueue, so child will run first.
+ */
+ if (array) {
+ if (!rt_task(current)) {
+ dequeue_task(this_task, array);
+ enqueue_task(this_task, array);
+ } else {
+ list_del(&this_task->run_list);
+ list_add_tail(&this_task->run_list,
+ array->queue + this_task->prio);
+ }
+ }
rq_unlock(rq);
}
next prev parent reply other threads:[~2003-01-20 22:20 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-09 23:54 Minature NUMA scheduler Martin J. Bligh
2003-01-10 5:36 ` [Lse-tech] " Michael Hohnbaum
2003-01-10 16:34 ` Erich Focht
2003-01-10 16:57 ` Martin J. Bligh
2003-01-12 23:35 ` Erich Focht
2003-01-12 23:55 ` NUMA scheduler 2nd approach Erich Focht
2003-01-13 8:02 ` Christoph Hellwig
2003-01-13 11:32 ` Erich Focht
2003-01-13 15:26 ` [Lse-tech] " Christoph Hellwig
2003-01-13 15:46 ` Erich Focht
2003-01-13 19:03 ` Michael Hohnbaum
2003-01-14 1:23 ` Michael Hohnbaum
2003-01-14 4:45 ` [Lse-tech] " Andrew Theurer
2003-01-14 4:56 ` Martin J. Bligh
2003-01-14 11:14 ` Erich Focht
2003-01-14 15:55 ` [PATCH 2.5.58] new NUMA scheduler Erich Focht
2003-01-14 16:07 ` [Lse-tech] " Christoph Hellwig
2003-01-14 16:23 ` [PATCH 2.5.58] new NUMA scheduler: fix Erich Focht
2003-01-14 16:43 ` Erich Focht
2003-01-14 19:02 ` Michael Hohnbaum
2003-01-14 21:56 ` [Lse-tech] " Michael Hohnbaum
2003-01-15 15:10 ` Erich Focht
2003-01-16 0:14 ` Michael Hohnbaum
2003-01-16 6:05 ` Martin J. Bligh
2003-01-16 16:47 ` Erich Focht
2003-01-16 18:07 ` Robert Love
2003-01-16 18:48 ` Martin J. Bligh
2003-01-16 19:07 ` Ingo Molnar
2003-01-16 18:59 ` Martin J. Bligh
2003-01-16 19:10 ` Christoph Hellwig
2003-01-16 19:44 ` Ingo Molnar
2003-01-16 19:43 ` Martin J. Bligh
2003-01-16 20:19 ` Ingo Molnar
2003-01-16 20:29 ` [Lse-tech] " Rick Lindsley
2003-01-16 23:31 ` Martin J. Bligh
2003-01-17 7:23 ` Ingo Molnar
2003-01-17 8:47 ` [patch] sched-2.5.59-A2 Ingo Molnar
2003-01-17 14:35 ` Erich Focht
2003-01-17 15:11 ` Ingo Molnar
2003-01-17 15:30 ` Erich Focht
2003-01-17 16:58 ` Martin J. Bligh
2003-01-18 20:54 ` NUMA sched -> pooling scheduler (inc HT) Martin J. Bligh
2003-01-18 21:34 ` [Lse-tech] " Martin J. Bligh
2003-01-19 0:13 ` Andrew Theurer
2003-01-17 18:19 ` [patch] sched-2.5.59-A2 Michael Hohnbaum
2003-01-18 7:08 ` William Lee Irwin III
2003-01-18 8:12 ` Martin J. Bligh
2003-01-18 8:16 ` William Lee Irwin III
2003-01-19 4:22 ` William Lee Irwin III
2003-01-17 17:21 ` Martin J. Bligh
2003-01-17 17:23 ` Martin J. Bligh
2003-01-17 18:11 ` Erich Focht
2003-01-17 19:04 ` Martin J. Bligh
2003-01-17 19:26 ` [Lse-tech] " Martin J. Bligh
2003-01-18 0:13 ` Michael Hohnbaum
2003-01-18 13:31 ` [patch] tunable rebalance rates for sched-2.5.59-B0 Erich Focht
2003-01-18 23:09 ` [patch] sched-2.5.59-A2 Erich Focht
2003-01-20 9:28 ` Ingo Molnar
2003-01-20 12:07 ` Erich Focht
2003-01-20 16:56 ` Ingo Molnar
2003-01-20 17:04 ` Ingo Molnar
2003-01-20 17:10 ` Martin J. Bligh
2003-01-20 17:24 ` Ingo Molnar
2003-01-20 19:13 ` Andrew Theurer
2003-01-20 19:33 ` Martin J. Bligh
2003-01-20 19:52 ` Andrew Theurer
2003-01-20 19:52 ` Martin J. Bligh
2003-01-20 21:18 ` [patch] HT scheduler, sched-2.5.59-D7 Ingo Molnar
2003-01-20 22:28 ` Andrew Morton [this message]
2003-01-21 1:11 ` Michael Hohnbaum
2003-01-22 3:15 ` Michael Hohnbaum
2003-01-22 16:41 ` Andrew Theurer
2003-01-22 16:17 ` Martin J. Bligh
2003-01-22 16:20 ` Andrew Theurer
2003-01-22 16:35 ` Michael Hohnbaum
2003-02-03 18:23 ` [patch] HT scheduler, sched-2.5.59-E2 Ingo Molnar
2003-02-03 20:47 ` Robert Love
2003-02-04 9:31 ` Erich Focht
2003-01-20 17:04 ` [patch] sched-2.5.59-A2 Martin J. Bligh
2003-01-21 17:44 ` Erich Focht
2003-01-20 16:23 ` Martin J. Bligh
2003-01-20 16:59 ` Ingo Molnar
2003-01-17 23:09 ` Matthew Dobson
2003-01-16 23:45 ` [PATCH 2.5.58] new NUMA scheduler: fix Michael Hohnbaum
2003-01-17 11:10 ` Erich Focht
2003-01-17 14:07 ` Ingo Molnar
2003-01-16 19:44 ` John Bradford
2003-01-14 16:51 ` Christoph Hellwig
2003-01-15 0:05 ` Michael Hohnbaum
2003-01-15 7:47 ` Martin J. Bligh
2003-01-14 5:50 ` [Lse-tech] Re: NUMA scheduler 2nd approach Michael Hohnbaum
2003-01-14 16:52 ` Andrew Theurer
2003-01-14 15:13 ` Erich Focht
2003-01-14 10:56 ` Erich Focht
2003-01-11 14:43 ` [Lse-tech] Minature NUMA scheduler Bill Davidsen
2003-01-12 23:24 ` Erich Focht
2003-01-20 21:59 [patch] HT scheduler, sched-2.5.59-D7 Manfred Spraul
2003-01-20 22:16 ` Ingo Molnar
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