| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
RE: [Xen-devel] Optimize credit scheduler __runq_tickle to reduce IPIs
|
To: |
Jan Beulich <JBeulich@xxxxxxxxxx> |
|
Subject: |
RE: [Xen-devel] Optimize credit scheduler __runq_tickle to reduce IPIs |
|
From: |
"Wei, Gang" <gang.wei@xxxxxxxxx> |
|
Date: |
Fri, 19 Mar 2010 17:55:26 +0800 |
|
Accept-language: |
zh-CN, en-US |
|
Acceptlanguage: |
zh-CN, en-US |
|
Cc: |
George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, "Tian, Kevin" <kevin.tian@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, "Yu, Ke" <ke.yu@xxxxxxxxx> |
|
Delivery-date: |
Fri, 19 Mar 2010 02:56:07 -0700 |
|
Envelope-to: |
www-data@xxxxxxxxxxxxxxxxxxx |
|
In-reply-to: |
<4BA356BD0200007800035DA7@xxxxxxxxxxxxxxxxxx> |
|
List-help: |
<mailto:xen-devel-request@lists.xensource.com?subject=help> |
|
List-id: |
Xen developer discussion <xen-devel.lists.xensource.com> |
|
List-post: |
<mailto:xen-devel@lists.xensource.com> |
|
List-subscribe: |
<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
|
List-unsubscribe: |
<http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
|
References: |
<E6467867A6B05E4FA831B7DF29925F5C40D6628C@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <4BA356BD0200007800035DA7@xxxxxxxxxxxxxxxxxx> |
|
Sender: |
xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
Thread-index: |
AcrHSXxun55kfzdNR7O5vWqFYw1JGwAAKLew |
|
Thread-topic: |
[Xen-devel] Optimize credit scheduler __runq_tickle to reduce IPIs |
Jan Beulich wrote:
>>>> "Wei, Gang" <gang.wei@xxxxxxxxx> 19.03.10 09:22 >>>
>> 2. if first_cpu() was used as the way to choose the target among all
>> possible idle cpus, will it cause overall unbalanced cpu
>> utilization? i.e. cpu 0 > cpu 1 > ... > cpu N
>
> This can be easily avoided by using cycle_cpu() and tracking the last
> used CPU on e.g. a per-pCPU basis (similar to idle_bias used in
> _csched_cpu_pick()).
Good sugguestion, thanks.
Jimmy
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home