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RE: [Xen-users] Problems with round trip times


  • To: "Markus Plischke" <m.plischke@xxxxxxxxx>, <Xen-users@xxxxxxxxxxxxxxxxxxx>
  • From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
  • Date: Sat, 12 Jul 2008 20:35:45 +1000
  • Cc:
  • Delivery-date: Sat, 12 Jul 2008 03:36:25 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcjjW//cGCmh58StRbasYpYC4cxDwAArvKAQ
  • Thread-topic: [Xen-users] Problems with round trip times

> Is use a Windows Server 2003 R2 x64 on XEN with the 0.9.10 PV drivers
from
> James.
> But with and without these driver I have the same problem:
> 
> C:\Program Files\Support Tools>ping 172.16.1.3
> 
> Pinging 172.16.1.3 with 32 bytes of data:
> 
> Reply from 172.16.1.3: bytes=32 time=24317ms TTL=128
> Reply from 172.16.1.3: bytes=32 time<1ms TTL=128
> Reply from 172.16.1.3: bytes=32 time<1ms TTL=128
> Reply from 172.16.1.3: bytes=32 time<1ms TTL=128
> 
> Ping statistics for 172.16.1.3:
>     Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
> Approximate round trip times in milli-seconds:
>     Minimum = 0ms, Maximum = 24317ms, Average = 6079ms
> 

I see exactly this problem with SMP but not on UP. I assume you are
running with vcpus > 1?

James

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