Hi, I am testing SCTP performance on 4.4.x mips kernel (Octeon 2 hardware) I have a specific requirement of testing 130K packets per second with each packet size of 278 bytes. Server(s) and Client(s) are running on separate machines each with 16 CPU Core. I am running two instances of iperf3 Server and client in those dedicated machines respectively. Is there any dependency between two instances from SCTP PoV ? Case -1: when Running with one instance of Server and Client ./iperf3 --sctp -4 -c 18.18.18.1 -B 18.18.18.2 -p 45000 -V -l 278 -t 60 -A 10 I am getting consistent bandwidth. CPU usage of Client is 100 % Case -2: when Running with two instances of Server and Client ./iperf3 --sctp -4 -c 18.18.18.1 -B 18.18.18.2 -p 45000 -V -l 278 -t 60 -A 10 ./iperf3 --sctp -4 -c 18.18.18.1 -B 18.18.18.2 -p 45020 -V -l 278 -t 60 -A 11 the bandwidth is not consistent and sometimes even 0 . CPU of both these process together reaches to 100% not individually. so if one client CPU usage is 80% other one CPU usage is 20% I have pinned the servers and clients to dedicated CPU cores. and softirq interrupts also are masked to these cores.(smp_affinity) I tried changing scheduling priority of these process to SCHED_RR (earlier SCHED_OTHER) but the situation is still the same. Best Regards, Deepak -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
