From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephan Diestelhorst Subject: Re: More on sedf scheduler Date: Thu, 14 Jul 2005 19:52:18 +0100 Message-ID: <42D6B462.2020808@cl.cam.ac.uk> References: <1121191749.3860.4.camel@thinkpad.austin.ibm.com> <200507141725.00390.sd386@cl.cam.ac.uk> <42D696AC.207@hp.com> <200507141839.58983.sd386@cl.cam.ac.uk> <42D6ABE6.1030502@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <42D6ABE6.1030502@hp.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Rob Gardner Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Just another question: What kind of hardware are you running on? Might this be related in any way to the strange IA64 bugs? > Stephan Diestelhorst wrote: > >> Thanks, >> what is your dom0 tight loop doing? Heavy I/O? >> It looks like dom0 does a lot of I/O, which immediatelly unblocks and >> then gets a higher priority in the L1 extraq, without anybounds on >> executiontime, i.e. slice length. Can you confirm this? >> >> Stephan >> >> > > The loop was just while(1); There was also a python script running > that was reading from xentrace. So no heavy i/o, at least no > disk/network i/o. But that doesn't matter anyway. Here is another dump > where dom0 is doing absolutely nothing besides while (1); And dom1 is > completely comatose during this time. > > Rob > > > (XEN) Scheduler: Simple EDF Scheduler (sedf) > (XEN) NOW=0x0000004AC8DEB496 > (XEN) CPU[00] now=321199566451 > (XEN) RUNQ rq ff18cf80 n: ff18cf80, p: ff18cf80 > (XEN) > (XEN) WAITQ rq ff18cf88 n: ffbf7e04, p: ff1bfe04 > (XEN) 0: 0.0 has=T p=20000000 sl=15000000 ddl=321220001780 w=0 > c=34111278898 sc=451020117 xtr(yes)=11730339611 ew=0 (34%) > (XEN) 1: 1.0 has=F p=100000000 sl=0 ddl=321370002222 w=0 > c=20938650825 sc=131072 xtr(yes)=20938650825 ew=1 (100%) > (XEN) > (XEN) EXTRAQ (penalty) rq ff18cf90 n: ffbf7e0c, p: ffbf7e0c > (XEN) 0: 0.0 has=T p=20000000 sl=15000000 ddl=321220001780 w=0 > c=34111278898 sc=451020117 xtr(yes)=11730339611 ew=0 (34%) > (XEN) > (XEN) EXTRAQ (utilization) rq ff18cf98 n: ff1bfe14, p: ffbf7e14 > (XEN) 0: 1.0 has=F p=100000000 sl=0 ddl=321370002222 w=0 > c=20938650825 sc=131072 xtr(yes)=20938650825 ew=1 (100%) > (XEN) 1: 0.0 has=T p=20000000 sl=15000000 ddl=321220001780 w=0 > c=34111278898 sc=451020117 xtr(yes)=11730339611 ew=0 (34%) > (XEN) > (XEN) not on Q > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel