How to measure the RAM read/write performance

[sandeep kumar]

>let' see....

>what if you do read and write pattern, in certain order so that it
>will be invalidated by the L1/L2/L3 cache everytime?

And how do you suggest we do that?? That is infact my question..



On Tue, Feb 26, 2013 at 9:05 PM, Mulyadi Santosa
<mulyadi.santosa at gmail.com>wrote:

> On Tue, Feb 26, 2013 at 6:31 PM, sandeep kumar
> <coolsandyforyou at gmail.com> wrote:
> > Hi All
> > In performance benchmark tools, When we profile read/write timings
> mostly,
> > those read/writes are done to cache only.
> >
> > I want to measure my DDR(RAM chip) performance.
> > So i want to make sure, every read/write should happen to DDR RAM chip
> only.
>
> let' see....
>
> what if you do read and write pattern, in certain order so that it
> will be invalidated by the L1/L2/L3 cache everytime?
>
> AFAIK, one thing for sure, reading data from sequentially and re-read
> them will make end up reading cache in the 2nd operation and so on.
>
> I think the most certain way to do it is to read data (or write) data
> bigger than total L1/L2/L3 cache.
>
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
>



-- 
With regards,
Sandeep Kumar Anantapalli,
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