3 ms·
Do you have a link to this cluster-on-die mode?
by seastarer 11y ago
Do you have a link to this cluster-on-die mode?
- virtuallynathan 11y agoThis document from Intel covers CoD mode (Pg. 28) and optimal DIMM sizes (Pg. 37), etc. https://drive.google.com/file/d/0B21tKtZ3UOQNdWtJZW9XekFCZ3M/view?usp=sharing https://drive.google.com/file/d/0B21tKtZ3UOQNdWtJZW9XekFCZ3M... You should also disable C-States (e.g. lock to C0) - https://rhsummit.files.wordpress.com/2013/06/shak-jeder-summit-perf-analysis-and-tuning-part-2-2013.pdf https://rhsummit.files.wordpress.com/2013/06/shak-jeder-summ... covers the performance impact of CPU states.
- seastarer 11y agoThanks. We "disable" C-states by polling -- the cpu never goes idle. This is partly because dpdk doesn't support interrupts, and partly because using interrupts is a major performance hit. We have plans to improve this, but nothing committed yet.