[Bug 503138] Re: after kernel message hrtimer: interrupt too slow.... the kvm guest becomes slow [possible solution found!]

[Frank]

10.04 still seems to have SMP problems. 
I don't see any hrtimer messages on host or kvm guest, but the guest performance gets slower with each CPU I add.

Simple netperf with 1 CPU:
657.80 throughput

Writing a file to an attached iSCSI device:
4294967296 Bytes (4,3 GB) 97,0817 s, 44,2 MB/s
real    1m37.215s

Same with 4 CPU:
netperf: 534.28
dd: 4294967296 Bytes (4,3 GB)  127,865 s, 33,6 MB/s
     real    2m8.011s

44,2 MB/s still really sucks (the host gets 100-115 MB/s), but at least
it's somewhat faster.

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after kernel message  hrtimer: interrupt too slow.... the kvm guest becomes slow [possible solution found!]
https://bugs.launchpad.net/bugs/503138
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