alt Hacker NewsSomething I didn’t see mentioned was that this unequal memory access time also affects pcie I/O. If your thread on CPU A needs to get data in or out of a nic on CPU B, your throughput/latency will be impacted.
We have to explain this to customers of our software all the time, it’s something that’s easy to miss.
Replies
alexzenla • today at 2:35 PM
(CTO of Edera here)
Great point! We also try to factor that in as well.
Steven (the author) will cover that in part 2!
Same. The drop in performance can be surprisingly bad. 10Gbps becomes 5Gbps. 100Gbps becomes 20Gbps.