Re: [Xen-devel] Xen 4.2.2 / KVM / VirtualBox benchmark on Haswell

[Gordan Bobic <gordan@xxxxxxxxxx>]

On Tue, 9 Jul 2013 16:21:52 +0000, Thanos Makatos 
<thanos.makatos@xxxxxxxxxx> wrote:
> > > IMO it's a bad thing because it's far from a representative
> > benchmark,
> > > which can lead to wrong conclusions when evaluation I/O 
> > performance.
> >  Ancient doesn't mean non-representative. A good file-system 
> > benchmark
> In this particular case it is: PostMark is a single-threaded
> application that performs read and write operations on a fixed set of
> files, at an unrealistically low directory depth; modern I/O 
> workloads
> exhibit much more complicated behaviour than this.
Unless you are running a mail server. Granted, running multiple
postmarks in parallel might be a better test on today's many-core
servers, but it'd likely make no little or no difference on a
disk I/O bound test.

Gordan

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