2016-05-26 02:53, Wang, Zhihong: > From: Thomas Monjalon [mailto:thomas.monjalon at 6wind.com] > > 2016-05-05 18:46, Zhihong Wang: > > > This patch enables configurable tx_first burst number. > > > > > > Use "start tx_first (burst_num)" to specify how many bursts of packets to > > > be sent before forwarding start, or "start tx_first" like before for the > > > default 1 burst send. > > > > The idea here is to fill the loopback latency gap with bursts. > > Would it be possible to make it automatic by detecting the first > > received packets to stop Tx generator? > > The idea is great! The implementation might not be graceful though > -- current tx_first mode first calls txonly engine before calling the > actual engine, say iofwd, so iofwd is not established before tx_first > is done, therefore no detection.
And what about rewriting tx_first? No strong opinion. I let you and Pablo decide. > It's possible to do this, but we need to implement another forward > engine like "io_retry_fill_first" alone, it complicates testpmd just for > this loop back test. > > Looks to me it's better to use combination of existing fwd engines to > do this, it's also more flexible with burst number parameters.
