BRAUN, Stefanie wrote:
Hello,
now I was able to start the guest vmu with disk virtio, and some of the
tests with disk involvement even improved a bit.
But the test in which a logo is added to the video stream does not
improve. I don't know why the performance is so bad?
Subtest: Reading video locally, adding a logo to the video stream and
then saving the video locally
Host performance: 50%
kvm process in host (top) : 99%
vlc process in vmu (top) : 99%
The output of kvm_stat -1 during the subtest is the following:
efer_reload 0 0
exits 9913473 3994
This indicates that kvm is running in guest mode all of the time and is
therefore quite efficient. Perhaps the test uses sse instructions which
kvm doesn't expose? Try adding -cpu core2duo to the command line.
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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