I want to know if a program that I am using and which requires a lot of memory is limited by the memory bandwidth.

When do you expect this to happen? Did it ever happen to you in a real-life scenario?

I found several articles discussing this issue, including:

The first link is a bit old, but suggests that you need to perform less than about 1-40 floating point operations per floating point variable in order to see this effect (correct me if I'm wrong).

How can I measure the memory bandwidth that a given program is using and how do I measure the (peak) bandwidth that my system can offer?

I don't want to discuss any complicated cache issues here. I'm only interested in the communication between the CPU and the memory.

c linux memory-management hpc
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