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xen-devel
Re: [Xen-devel] Credit scheduler
I have 4 physical cpus (2 dual core sockets) and the IO workload is loadsim
with 500 users
Thanks
-Prabha
-------------- Original message ----------------------
From: Keir Fraser <keir@xxxxxxxxxxxxx>
> How many physical CPUs do you have, and what is the IO workload that one of
> the VMs is running?
>
> -- Keir
>
> On 26/6/07 22:33, "pak333@xxxxxxxxxxx" <pak333@xxxxxxxxxxx> wrote:
>
> > Hi
> >
> > I have noticed that VMs are typically spending 3 microsecs or less before
> > they
> > are being prempted. I thought that the credit schduler time slice was 30
> > ms. I
> > have 4 VMs running and they are all cpu intensive except for 1 (which is IO
> > intensive) but having a VM spend max 3 micro secs before being kicked out
> > seems strange.
> >
> > Is there something else going on that i am not aware of. Is the time slice
> > really 30 millisecs? I am using default parameters of the credit scheduler.
> >
> > Thanks
> > -Prabha
> >
> >
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
>
>
--- Begin Message ---
How many physical CPUs do you have, and what is the IO workload that one of the VMs is running?
-- Keir
On 26/6/07 22:33, "pak333@xxxxxxxxxxx" <pak333@xxxxxxxxxxx> wrote:
Hi
I have noticed that VMs are typically spending 3 microsecs or less before they are being prempted. I thought that the credit schduler time slice was 30 ms. I have 4 VMs running and they are all cpu intensive except for 1 (which is IO intensive) but having a VM spend max 3 micro secs before being kicked out seems strange.
Is there something else going on that i am not aware of. Is the time slice really 30 millisecs? I am using default parameters of the credit scheduler.
Thanks
-Prabha
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http://lists.xensource.com/xen-devel
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http://lists.xensource.com/xen-devel
--- End Message ---
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