[Qemu-devel] Best way to get real performance info?

[Qemu-devel] Best way to get real performance info?

[Alessandro Corradi]

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Hi all,
I need to measure the performance of a host OS, a guest OS with and without
kqemu.
I particular I need to have performance info about CPU. I made a simple C
program that makes only arithmetical operations and long cycles.
I run "time ./myapp" but the results are not the real ones. Can someone tell
me how to get this measures?
Thanks

Ale

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Re: [Qemu-devel] Best way to get real performance info?

[andrzej zaborowski]

On 06/09/06, Alessandro Corradi <ale.corradi@gmail.com> wrote:
>
> Hi all,
> I need to measure the performance of a host OS, a guest OS with and without
> kqemu.
> I particular I need to have performance info about CPU. I made a simple C
> program that makes only arithmetical operations and long cycles.
> I run "time ./myapp" but the results are not the real ones. Can someone tell
> me how to get this measures?

Hi,

I don't know about real benchmarking but one improvement I can think
of is measure the times on host, with something like the following:

[user@host] $ nc -l 10000; time nc -l 10000

and

[user@guest] $ nc host_ip_here 10000 <<< started; ./myapp; nc
host_ip_here 10000 <<< finished

(nc is netcat)
It's still very inaccurate but the error is small if ./myapp takes
long. Perhaps someone will have better ideas.

> Thanks
>
> Ale
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>
>
>


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