Performance Analysis - EMUL_MTSPR: Increased counts

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Hi,
I am doing the virtio performance analysis on PowerPC,with the updated
QEMU I had observed that the EMUL_MTSPR instruction counts in KVM Exit
count is going really high when I send packets from Guest with respect
to without sending network packets from Guest.
I had added few prints and found that special register number 336
which corresponds to TSR:Timer Status is been called number of times
which I think could result in a higher CPU Utilization.
I would be thankful if I could get some opinions about this observation.
Regards
Nitesh Narayan Lal
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