4 ms·
Is that intel ARK published spec sheet bandwidth, or actual usable bandwidth? There is a difference. I've found I get about 75-80% of the advertised bandwidth
by drewg123 7y ago
Is that intel ARK published spec sheet bandwidth, or actual usable bandwidth? There is a difference.
I've found I get about 75-80% of the advertised bandwidth both from my real app (TLS crypto) and a toy memory copy benchmark using AVX256 instructions. The toy memory copy benchmark is how I realized that my bottleneck was actually memory bandwidth and not CPU horsepower on Broadwell based servers.
- tempguy9999 7y agoI haven't a clue. I just got it off the link quoted. It's a good question and when there's a difference, you know what marketing will say. To make a stab, I suppose it might depend on whether all requests are coming from a single memory bank or spread evenly across all memory banks, assuming fully populated (again from the link "Octa-channel (up from hexa-channel)")