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Re: [Xen-devel] Credit scheduler
- To: <pak333@xxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
- From: Keir Fraser <keir@xxxxxxxxxxxxx>
- Date: Wed, 27 Jun 2007 01:59:27 +0100
- Delivery-date: Tue, 26 Jun 2007 17:57:32 -0700
- List-id: Xen developer discussion <xen-devel.lists.xensource.com>
- Thread-index: Ace4Vmjmp6jWsCRJEdyu6gAX8io7RQ==
- Thread-topic: [Xen-devel] Credit scheduler
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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