so contributes to the far
end of the long tail latency.
[Possible Solution]
1. add a lock to prevent csched_acct() from interleaving with
csched_vcpu_wake();
2. separate the BOOST state from UNDER and OVER states.
---
Ple
llows: Hypervisor(Xen 4.5.0), Dom 0(Linux
3.18.21), Dom U(Linux 3.18.21). I also test longterm version Linux
3.18.30 and the latest longterm version, Linux 4.4.7. Those kernels
all have this issue.
Please confirm this bug. Thanks.
--
Tony. S
Ph. D student of University of Colorado, Colorado Spr
On Mon, May 16, 2016 at 5:30 AM, Dario Faggioli
wrote:
> [Adding George, and avoiding trimming, for his benefit]
>
> On Sat, 2016-05-14 at 22:11 -0600, Tony S wrote:
>> Hi all,
>>
> Hi Tony,
>
>> When I was running latency-sensitive applications in VMs on Xen, I
On Mon, May 16, 2016 at 5:37 AM, Dario Faggioli
wrote:
> [Adding George again, and a few Linux/Xen folks]
>
> On Sat, 2016-05-14 at 18:25 -0600, Tony S wrote:
>> In virtualized environments, sometimes we need to limit the CPU
>> resources to a virtual machine(VM). For e
On Mon, May 16, 2016 at 3:38 PM, Tony S wrote:
> On Mon, May 16, 2016 at 5:37 AM, Dario Faggioli
> wrote:
>> [Adding George again, and a few Linux/Xen folks]
>>
>> On Sat, 2016-05-14 at 18:25 -0600, Tony S wrote:
>>> In virtualized environments, sometimes we ne
On Tue, May 17, 2016 at 3:27 AM, George Dunlap wrote:
> On Sun, May 15, 2016 at 5:11 AM, Tony S wrote:
>> Hi all,
>>
>> When I was running latency-sensitive applications in VMs on Xen, I
>> found some bugs in the credit scheduler which will cause long tail
>
ut I'm
> curious to see if it helps.
Hi Dario,
I did not see the patch. Can you please send me the patch and I will
try to test it later.
Best
Tony
>
> Thanks again and Regards,
> Dario
> --
> <> (Raistlin Majere)
> -
> Dario Faggioli, Ph.D, ht
On Wed, May 18, 2016 at 11:20 AM, Boris Ostrovsky
wrote:
> On 05/18/2016 12:10 PM, Dario Faggioli wrote:
>> On Wed, 2016-05-18 at 16:53 +0200, Juergen Gross wrote:
>>> On 18/05/16 16:46, Boris Ostrovsky wrote:
Won't we be accounting for stolen cycles twice now --- once from
steal_ac
On Wed, May 18, 2016 at 11:59 AM, Tony S wrote:
> On Wed, May 18, 2016 at 11:20 AM, Boris Ostrovsky
> wrote:
>> On 05/18/2016 12:10 PM, Dario Faggioli wrote:
>>> On Wed, 2016-05-18 at 16:53 +0200, Juergen Gross wrote:
>>>> On 18/05/16 16:46, Boris Ostrovs
