Re: [Xen-devel] More on sedf scheduler

[Stephan Diestelhorst <sd386@xxxxxxxxxxxx>]

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
>
>
>
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