> When you say "2x" performance increase, do you mean CPU performance or > send()/recv() latency? Do you mind saying a few words on what changes > you have made? >
Much of the performance gains involved removing things out of the fast-path that only needed to be called once at initialization (forgoing code simplicity for performance). Example: a vector of pointers, a bound callable object; many of which had calls to malloc and free which incurs quite a lot of unnecessary overhead. Less cpu cycles/less time are spent in the send()/recv() calls. This roughly worked out to about half the CPU usage when looking at oprofile. Because of this, the overall latency is reduced. We measured about 250us RTT from device to host and back to device with the latency measurement app in uhd examples. -josh _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
