On Thu, Sep 19, 2013 at 05:07:56PM +0200, Max Reitz wrote: > As far as I understand, the I/O speed (the duration of an I/O > operation) should be pretty much the same for all scenarios, > however, the latency is the value in question (since the overlap > checks should affect the latency only).
The other value to look at is the host CPU consumption per I/O. In other words, the CPU overhead added by performing the extra checks: efficiency = avg throughput / avg cpu utilization Once CPU consumption reaches 100% the workload is CPU-bound and we have a bottleneck. Hopefully the efficiency doesn't change noticably either, then we know there is no big impact from the extra checks. Stefan
