Am Mittwoch, 26. Juli 2006 22:04 schrieb Herbert Poetzl: > > > > > > well, not all solaris does is a good idea per se > > > and I think the current hard cpu scheduler is much > > > more powerful than the solaris proportional stuff > > > (i.e. you can consider the solaris settings a subset > > > of what you can achieve with the hard cpu scheduler) > > > > If the solaris fss is a subset, how do I set the token bucket values? > > With 3 vservers and 0.5 , 0.25 , 0.25 as (fillrate/intervall) for > > these, how do I get 2/3 for the first and 1/3 for the second vserver > > if the third vserver is idle as in the solaris fss case? Where is the > > hidden parameter? > > I take it that you 'simply' want fair scheduling > between three guests in a 2:1:1 ratio when all three > guests are hogging cpu, yes?
Yes, the above settings of (fillrate/intervall) should achieve this. > > in this case you simply forget the maximum values > i.e. set them to something very low to give some > kind of minimum amount of tokens per time unit, e.g. > 1/100 and use a set of 2:1:1 for the idle time values > e.g. 1/3,1/6 and 1/6. once hard cpu and indle time > is enabled for those guests, they will run in the > specified ratio, as long as host processes do not > consume cpu resources, in which case the remaining > cpu resources will be divided 2:1:1 between them But what happens if the third vserver falls to idle? In the solaris case the remaining two vservers would get 2/3 and 1/3 of the cpus (if the host ifself is idle as well). In the vserver case we get idle time now: 1/4 with the values above. Then this idle time is shared amon the three vservers according to the (fillrate/intervall)_2 for idle time? Well, I don't think this is the same as in the solaris case. (I mention the solaris case here because in some use cases this makes sense, not because I think it is superior. I want to get my understanding of vserver-scheduling right.) Where can one enable the idle time token bucket? The user-level tools don't seem to have support for this. -- Wilhelm _______________________________________________ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
