Re: [Qemu-devel] [PATCH v1 00/17] dataplane: optimization and multi virtqueue support

[Stefan Hajnoczi]

On Wed, Aug 06, 2014 at 01:33:36PM +0800, Ming Lei wrote:
> With coroutine, the running time for same loading is increased
> ~50%(1.325s vs. 0.903s), and dcache load events is increased

I agree with Paolo about microbenchmarks.  We need to do I/O to get a
realistic picture of performance, since there is little point is
optimizing something that is not a significant factor in overall
performance.

But I also wanted to say that these benchmark durations are so short
that they can be greatly affected by outliers (e.g. scheduler behavior,
system background activity, etc).  Run benchmarks for 2 minutes to
reduce variance and give the system time to "warm up".

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