On 02/01/13 10:29, Vincent Guittot wrote:
On 2 January 2013 06:28, Viresh Kumar viresh.ku...@linaro.org wrote:
On 20 December 2012 13:41, Vincent Guittot vincent.guit...@linaro.org wrote:
On 19 December 2012 11:57, Morten Rasmussen morten.rasmus...@arm.com wrote:
If I understand the new
On 19/12/12 09:34, Viresh Kumar wrote:
On 19 December 2012 14:53, Vincent Guittot vincent.guit...@linaro.org wrote:
Le 19 déc. 2012 07:34, Viresh Kumar viresh.ku...@linaro.org a écrit :
Can we resolve this issue now? I don't want anything during the release
period
this time.
The new version
in the MP branch for the 12.12 release? Testing with sysbench
and
coremark show significant performance improvements for parallel workloads as all
cpus can now be used for cpu intensive tasks.
Thanks,
Morten
Morten Rasmussen (1):
sched: Basic global balancing support for HMP
kernel/sched/fair.c
is under-utilized.
Signed-off-by: Morten Rasmussen morten.rasmus...@arm.com
---
kernel/sched/fair.c | 101 +--
1 file changed, 97 insertions(+), 4 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 1cfe112..7ac47c9 100644
wrote:
On Fri, Dec 7, 2012 at 5:33 PM, Morten Rasmussen
morten.rasmus...@arm.com wrote:
Hi Viresh,
Here is a patch that introduces global load balancing on top of the
existing HMP
patch set. It depends on the HMP patches already present in your
task-placement-v2
branch. It can
On 07/12/12 14:54, Viresh Kumar wrote:
On 7 December 2012 18:43, Morten Rasmussen morten.rasmus...@arm.com wrote:
I should have included the numbers in the cover letter. Here are
numbers for TC2.
sysbench (normalized execution time, lower is better)
threads 2 4 8
HMP
On 05/12/12 11:01, Viresh Kumar wrote:
On 5 December 2012 16:28, Liviu Dudau liviu.du...@arm.com wrote:
The revert request came at Morten's suggestion. He has comments on the code and
technical reasons
why he believes that the approach is not the best one as well as some scenarios
where
On 05/12/12 11:35, Viresh Kumar wrote:
On 5 December 2012 16:58, Morten Rasmussen morten.rasmus...@arm.com wrote:
I tested Vincent's fix (sched: pack small tasks: fix update packing
domain) for the buddy selection some weeks ago and confirmed that it
works. So my quick fixes are no longer
Hi Vincent,
On Mon, Nov 12, 2012 at 01:51:00PM +, Vincent Guittot wrote:
On 9 November 2012 18:13, Morten Rasmussen morten.rasmus...@arm.com wrote:
Hi Vincent,
I have experienced suboptimal buddy selection on a dual cluster setup
(ARM TC2) if SD_SHARE_POWERLINE is enabled at MC level
Hi Vincent,
On 19/11/12 09:20, Vincent Guittot wrote:
Hi,
On 16 November 2012 19:32, Liviu Dudau liviu.du...@arm.com wrote:
From: Morten Rasmussen morten.rasmus...@arm.com
Re-enable SD_SHARE_POWERLINE to reflect the power domains of TC2.
---
arch/arm/kernel/topology.c |2 +-
1 file
On 19/11/12 12:23, Vincent Guittot wrote:
On 19 November 2012 13:08, Morten Rasmussen morten.rasmus...@arm.com wrote:
Hi Vincent,
On 19/11/12 09:20, Vincent Guittot wrote:
Hi,
On 16 November 2012 19:32, Liviu Dudau liviu.du...@arm.com wrote:
From: Morten Rasmussen morten.rasmus
On 19/11/12 14:09, Vincent Guittot wrote:
On 19 November 2012 14:36, Morten Rasmussen morten.rasmus...@arm.com wrote:
On 19/11/12 12:23, Vincent Guittot wrote:
On 19 November 2012 13:08, Morten Rasmussen morten.rasmus...@arm.com
wrote:
Hi Vincent,
On 19/11/12 09:20, Vincent Guittot wrote
On Fri, Nov 02, 2012 at 10:53:47AM +, Santosh Shilimkar wrote:
On Monday 29 October 2012 06:42 PM, Vincent Guittot wrote:
On 24 October 2012 17:20, Santosh Shilimkar santosh.shilim...@ti.com
wrote:
Vincent,
Few comments/questions.
On Sunday 07 October 2012 01:13 PM, Vincent
Hi Vincent,
I have experienced suboptimal buddy selection on a dual cluster setup
(ARM TC2) if SD_SHARE_POWERLINE is enabled at MC level and disabled at
CPU level. This seems to be the correct flag settings for a system with
only cluster level power gating.
To me it looks like
hmp_domain), GFP_KERNEL);
cpumask_copy(domain-cpus, hmp_fast_cpu_mask);
--
1.7.10.4
From 9f241c37bb7316eeea56e6c93541352cf5c9b8a8 Mon Sep 17 00:00:00 2001
From: Morten Rasmussen morten.rasmus...@arm.com
Date: Fri, 12 Oct 2012 15:25:02 +0100
Subject: [PATCH] sched: Only down migrate low
On Fri, Oct 12, 2012 at 04:33:19PM +0100, Jon Medhurst (Tixy) wrote:
On Fri, 2012-10-12 at 16:11 +0100, Morten Rasmussen wrote:
Hi Tixy,
Thanks for the patch. I think this patch is the right way to solve this
issue.
There is still a problem with the priority filter
On Thu, Oct 04, 2012 at 07:49:32AM +0100, Viresh Kumar wrote:
On 22 September 2012 00:02, morten.rasmus...@arm.com wrote:
From: Morten Rasmussen morten.rasmus...@arm.com
We can't rely on Kconfig options to set the fast and slow CPU lists for
HMP scheduling if we want a single kernel
Hi Tixy,
Could you have a look at my code stealing patch below? Since it is
basically a trimmed version of one of your patches I would prefer to
put you as author and have your SOB on it. What is your opinion?
Thanks,
Morten
On Fri, Sep 21, 2012 at 07:32:21PM +0100, Morten Rasmussen wrote
On Thu, Oct 04, 2012 at 07:58:45AM +0100, Viresh Kumar wrote:
On 22 September 2012 00:02, morten.rasmus...@arm.com wrote:
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
+void __init arch_get_hmp_domains(struct list_head *hmp_domains_list)
+{
+ struct cpumask
Hi Viresh,
On Thu, Oct 04, 2012 at 07:02:03AM +0100, Viresh Kumar wrote:
Hi Morten,
On 22 September 2012 00:02, morten.rasmus...@arm.com wrote:
From: Morten Rasmussen morten.rasmus...@arm.com
This patch introduces the basic SCHED_HMP infrastructure. Each class of
cpus is represented
On Thu, Oct 04, 2012 at 07:27:00AM +0100, Viresh Kumar wrote:
On 22 September 2012 00:02, morten.rasmus...@arm.com wrote:
+config SCHED_HMP_PRIO_FILTER
+ bool (EXPERIMENTAL) Filter HMP migrations by task priority
+ depends on SCHED_HMP
Should it depend on EXPERIMENTAL?
From: Morten Rasmussen morten.rasmus...@arm.com
Adds ftrace event for tracing task migrations using HMP
optimized scheduling.
Signed-off-by: Morten Rasmussen morten.rasmus...@arm.com
---
include/trace/events/sched.h | 28
kernel/sched/fair.c | 15
From: Morten Rasmussen morten.rasmus...@arm.com
Adds Kconfig entries to enable HMP scheduling on ARM platforms.
Currently, it disables CPU level sched_domain load-balacing in order
to simplify things. This needs fixing in a later revision. HMP
scheduling will do the load-balancing at this level
From: Morten Rasmussen morten.rasmus...@arm.com
Adds ftrace events for key variables related to the entity
load-tracking to help debugging scheduler behaviour. Allows tracing
of load contribution and runqueue residency ratio for both entities
and runqueues as well as entity CPU usage ratio
From: Morten Rasmussen morten.rasmus...@arm.com
Hi Paul, Paul, Peter, Suresh, linaro-sched-sig, and LKML,
As a follow-up on my Linux Plumbers Conference talk about my experiments with
scheduling on heterogeneous systems I'm posting a proof-of-concept patch set
with my modifications
From: Morten Rasmussen morten.rasmus...@arm.com
SCHED_HMP requires the different cpu types to be represented by an
ordered list of hmp_domains. Each hmp_domain represents all cpus of
a particular type using a cpumask.
The list is platform specific and therefore must be generated by
platform code
From: Morten Rasmussen morten.rasmus...@arm.com
We can't rely on Kconfig options to set the fast and slow CPU lists for
HMP scheduling if we want a single kernel binary to support multiple
devices with different CPU topology. E.g. TC2 (ARM's Test-Chip-2
big.LITTLE system), Fast Models, or even
From: Morten Rasmussen morten.rasmus...@arm.com
Introduces a priority threshold which prevents low priority task
from migrating to faster hmp_domains (cpus). This is useful for
user-space software which assigns lower task priority to background
task.
Signed-off-by: Morten Rasmussen morten.rasmus
From: Morten Rasmussen morten.rasmus...@arm.com
This patch introduces forced task migration for moving suitable
currently running tasks between hmp_domains. Task behaviour is likely
to change over time. Tasks running in a less capable hmp_domain may
change to become more demanding and should
From: Morten Rasmussen morten.rasmus...@arm.com
This patch introduces the basic SCHED_HMP infrastructure. Each class of
cpus is represented by a hmp_domain and tasks will only be moved between
these domains when their load profiles suggest it is beneficial.
SCHED_HMP relies heavily on the task
From: Morten Rasmussen morten.rasmus...@arm.com
We need a way to prevent tasks that are migrating up and down the
hmp_domains from migrating straight on through before the load has
adapted to the new compute capacity of the CPU on the new hmp_domain.
This patch adds a next up/down migration delay
From: Morten Rasmussen morten.rasmus...@arm.com
This patch adds load_avg_ratio to each task. The load_avg_ratio is a
variant of load_avg_contrib which is not scaled by the task priority. It
is calculated like this:
runnable_avg_sum * NICE_0_LOAD / (runnable_avg_period + 1).
Signed-off
Hi Viresh,
On Mon, Sep 03, 2012 at 06:21:26AM +0100, Viresh Kumar wrote:
On 28 August 2012 10:37, Viresh Kumar viresh.ku...@linaro.org wrote:
I have updated
https://wiki.linaro.org/WorkingGroups/PowerManagement/Process/bigLittleMPTree
as per our last discussion. Please see if i have
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