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I have an embedded Linux ARM system that is showing significantly less throughput than expected on both Ethernet and USB. I suspect the memory may be contributing. Is there a way to observe the memory bandwidth that is consumed while running a throughput test on the Ethernet or USB?

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What platform? The best method may be architecture-specific. –  Gilles Feb 23 '12 at 23:18
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up vote 2 down vote accepted

There is a memory bandwidth benchmark available in open source. It works for Intel & ARM under Linux or Windows Mobile CE.

It will give you raw performance for your memory as well as system performance with memory. But it won't give you a real-time bandwidth, so I don't know if it's a good answer to your question.

There's also a memtop tool out there, but it's more about usage than bandwidth. Perf tool can be handy in order to detect page fault.

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