A Quick Note There are a lot of topics that could be addressed here, but this short note will focus on bandwidth from main memory (using the STREAM benchmark) as a function of the number of threads used. Published STREAM Bandwidth Results Official STREAM submission at: http://www.cs.virginia.edu/stream/stream_mail/2013/0015.html Compiled with icc… read more
Notes on the mystery of hardware cache performance counters
In response to a question on the PAPI mailing list, I scribbled some notes to try to help users understand the complexity of hardware performance counters for cache accesses and cache misses, and thought they might be helpful here…. For any interpretation of specific hardware performance counter events, it is… read more
Coherence with Cached Memory-Mapped IO
In response to my previous blog entry, a question was asked about how to manage coherence for cached memory-mapped IO regions. Here are some more details… Maintaining Coherence with Cached Memory-Mapped IO For the “read-only” range, cached copies of MMIO lines will never be invalidated by external traffic, so repeated… read more