[openib-general] Re: [PATCH] rewrite perftest/README

[Michael S. Tsirkin]

Quoting r. Grant Grundler <iod00d at hp.com>:
> Subject: [PATCH] rewrite perftest/README
> 
> Michael,
> Here's a complete rewrite of the README file.
> Should make it easier for people to understand
> 	o how to build
> 	o run
> 	o interpret results
> 
> 
> I'd still like to add abit more about statisical significance
> of the sample size of 1000 but am just "refreshing my memory"
> (ok, lame excuse, I've forgotten everything from 20years ago :^)
> on how to do that. Maybe you can craft something based on your
> experience plus the observations below?
> 
> Ditching the last two (extreme) readings from the "server" side
> of the histogram:
> 	o standard deviation            86 cycles
> 	o "arithmetic mean" (average) 7135 cycles
> 	o median                      7126 cycles
>         o min    6906 cycles (sorted sample #1)
> 	o max    7490 cycles (sorted sample #997)
> 
> (For the record, #998 is 8798 and #999 is 50305, we are clearly
> measuring something else here too)
> 
> (1.5Ghz IA64, PCI-X, 2.6.11, forgot which SVN they are running)
> 
> The median value is *very* reproducible on this configuration.
> +- 1 cycle consistently over 5 runs of rdma_lat.
> 
> 
> thanks,
> grant
> 
> Signed-off-by: Grant Grundler <iod00d at hp.com>

Thanks, checked in.


-- 
MST - Michael S. Tsirkin