Re: [Xen-devel] Xen cpu usage limting - Brian Wolfe - com.xensource.lists.xen-devel

34 messages in com.xensource.lists.xen-develRe: [Xen-devel] Xen cpu usage limting

From	Sent On	Attachments
Brian Wolfe	16 Apr 2004 09:39
Keir Fraser	16 Apr 2004 09:47
Rolf Neugebauer	16 Apr 2004 09:53
Brian Wolfe	16 Apr 2004 10:14
Mark Williamson	16 Apr 2004 10:17
Keir Fraser	16 Apr 2004 10:19
Mark Williamson	16 Apr 2004 10:32
Brian Wolfe	16 Apr 2004 10:52
Ian Pratt	16 Apr 2004 12:13
Brian Wolfe	16 Apr 2004 15:46
Mark Williamson	19 Apr 2004 08:39
Brian Wolfe	19 Apr 2004 10:26
Mark Williamson	19 Apr 2004 10:34
Brian Wolfe	19 Apr 2004 11:57
I RATTAN	20 Apr 2004 08:43
Borut Mrak	20 Apr 2004 09:27
I RATTAN	20 Apr 2004 11:01
Rolf Neugebauer	20 Apr 2004 11:22
I RATTAN	20 Apr 2004 17:24
Neugebauer, Rolf	20 Apr 2004 17:45
I RATTAN	21 Apr 2004 08:28
Mark Williamson	21 Apr 2004 09:05
I RATTAN	21 Apr 2004 10:21
Rolf Neugebauer	21 Apr 2004 10:40
I RATTAN	21 Apr 2004 19:27
I RATTAN	22 Apr 2004 08:07
Kip Macy	27 Apr 2004 11:55
Ian Pratt	27 Apr 2004 17:27
Kip Macy	27 Apr 2004 18:24
Ian Pratt	27 Apr 2004 19:15
Nuno Silva	27 Apr 2004 19:22
Keir Fraser	27 Apr 2004 23:52
Kip Macy	15 May 2004 17:24
Kip Macy	31 May 2004 13:38

Subject:	Re: [Xen-devel] Xen cpu usage limting
From:	Brian Wolfe (bri...@terrabox.com)
Date:	04/16/2004 10:52:34 AM
List:	com.xensource.lists.xen-devel

Sounds great. :) It's probably that 3com card then that's nailing the cpu.

Anyone thought of starting some kind of wiki for xen yet? If not, I'm willing to toss up some space as xen.terrabox.com and an install of phpwiki.

I'm definitly looking froward to the new scheduler's controls. I'll wait as pantiently as I can (heh, bout as good as a kid in a candy store. ;) ).

Thanks guys! Again, Xen and ya'll rock!

Mark Williamson said:

I was also wondering if there is a way to assign a percentage of cpu time to a domain. Eg guarantee domain 3 gets 25% of the cpu time no matter how many other domains are in there, or how much cpu time they want.

The Atropos scheduler allows you to specify that a domain should receive x nanoseconds of CPU time per y nanoseconds of real time, i.e. what share of the CPU a domain gets and how regularly it gets scheduled. Don't overcommit the CPU, though (i.e. reserve more than [100 minus a small margin for overheads] percent in total across all domains).

You can select Atropos using sched=atropos as a boot param to Xen. The administrator tools (xc_dom_control.py and friends) don't have support for actually configuring it yet (though there's some library calls available in the Python Xc module if you want to write your own script) but I'll be checking in basic support early next week.

Cheers,