Re: [Gems-users] Which matrices should be used to compare CMP coherence protocols?

[Dan Gibson <degibson@xxxxxxxx>]

RUBY_CYCLES is time. It is pretty much THE performance metric. Everything else is, to some extent, informational.

Regards,
Dan

On Tue, Mar 23, 2010 at 2:23 PM, lopamudra chatterjee <lopamudralopa@xxxxxxxxxxxxxx> wrote:

RUBY_CYCLES is indeed lower on the supposedly better performance protocol i.e. MOESI_CMP_directory. Is there any other metrices that I should consider?

Sorry for double message. Initially didn't realize how I should reply.

Thanks,
Lopamudra

On Tue, 23 Mar 2010 22:44:36 +0530 wrote

>What does RUBY_CYCLES say?
>
>

On Tue, Mar 23, 2010 at 12:06 PM, lopamudra chatterjee <lopamudralopa@xxxxxxxxxxxxxx> wrote:
>

Hi,
>
>I am trying to compare the performance of 2 CMP cache coherence protocols by running a benchmark. Could anyone please give me an idea about which matrices from the ruby stats file will be good for performance comparison? Because according to the wiki MOESI_CMP_directory is supposed to give better performance than MSI_MOSI_CMP_directory. But I found that the miss_latency of my run says otherwise.
>
>Thanks,
>Lopamudra 
>
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