Re: HPCs for DRAM

PS. The ideal would be to distinguish memory bandwidth and memory capacity
like MEMORY_BW_READS
<https://yunmingzhang.wordpress.com/2015/07/22/measure-memory-bandwidth-using-uncore-counters/>
but it's not available, at least with this name, in my machine.

On 18 June 2016 at 15:29, Dimitris Ganosis <[email protected]>
wrote:

> I run an Intel(R) Xeon(R) CPU E5520 @ 2.27GHz and follow, apart from perf
> list, this list
> <http://oprofile.sourceforge.net/docs/intel-corei7-events.php>for the
> available counters.
> Based on Linux perf events Event Sources
> <http://www.brendangregg.com/perf.html> I expected that counters like
>
> MEM_STORE_RETIRED and MEM_LOAD_RETIRED
>
> would capture only DRAM's activity. I mean that if I don't use DRAM it's
> bizarre to me to see these counters have the same trend with CPI and other
> cpu counters. I run a cpu intensive benchmark which does not use DRAM, as I
> could see from htop, and these two counters followed the same trend, in the
> graph that I created later, with almost all the other counters. So, my
> question is if there are any counters which are "triggered" only when I use
> DRAM?
> Like the IO_TRANSACTIONS which is triggered only when I have I/Os.
> Thank you!
>

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