* effect of ticks in xen credit scheduler
@ 2015-04-21 9:48 teabe
2015-04-21 13:59 ` George Dunlap
0 siblings, 1 reply; 2+ messages in thread
From: teabe @ 2015-04-21 9:48 UTC (permalink / raw)
To: xen-devel
Hi,
I am student starting to work with Xen. I am using Xen 4.2.0. I am
trying to understand the functioning of the credit scheduler in Xen. I
try to modify the scheduler number of ticks per timeslice (form 3 to 1).
I wonder that the is no difference in the scheduling of my virtual
machines (No change in CPU allocation % and also application performance
in the virtual machine). I just wanted to know what is the use of tich
during time slice? Why do xen define 3 ticks per timeslice?
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: effect of ticks in xen credit scheduler
2015-04-21 9:48 effect of ticks in xen credit scheduler teabe
@ 2015-04-21 13:59 ` George Dunlap
0 siblings, 0 replies; 2+ messages in thread
From: George Dunlap @ 2015-04-21 13:59 UTC (permalink / raw)
To: teabe; +Cc: xen-devel@lists.xen.org
On Tue, Apr 21, 2015 at 10:48 AM, teabe <teabetab@gmail.com> wrote:
> Hi,
> I am student starting to work with Xen. I am using Xen 4.2.0.
Out of curiosity, why are you looking at 4.2.0 instead of 4.5, or unstable?
> I am trying to
> understand the functioning of the credit scheduler in Xen. I try to modify
> the scheduler number of ticks per timeslice (form 3 to 1). I wonder that the
> is no difference in the scheduling of my virtual machines (No change in CPU
> allocation % and also application performance in the virtual machine).
> I just wanted to know what is the use of tich during time slice? Why do xen
> define 3 ticks per timeslice?
Did you look at the function csched_tick() and try to figure out what it does?
-George
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2015-04-21 13:59 ` George Dunlap
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