Ubuntu
qemu package

  1. Bug #503138
  2. Comment #18

Comment 18 for bug 503138

Revision history for this message
Frank Müller (mueller-wave-computer) wrote : Re: after kernel message hrtimer: interrupt too slow.... the kvm guest becomes slow [possible solution found!]

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.