[Bug 251052] [sctp] Throughput becomes extremely low under load
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Date: Sat, 23 Apr 2022 04:11:27 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251052 --- Comment #11 from bc979@lafn.org --- (In reply to Bryan Drewery from comment #9) It appears that iperf3 does not use multiple streams regardless of the settings for the arguments. With nstreams set to > 1, tcpdump shows that the SCTP field SID is always 0. Looking through the code, the actual write statement used does not support including a stream pointer. I suspect that was overlooked in the last update. The code does call a sctp_write like function, but it is just set to their standard write module. Iperf3 will not test this problem although it does sort of indicate a problem since the throughput basically goes to zero. This just might be a problem in iperf3 rather than in SCTP. -- You are receiving this mail because: You are the assignee for the bug.