On 07/25, Rao Shoaib wrote: > Hi Stanislav, > > I have a question about the placement of tcp_bpf_rtt() call in > tcp_rtt_estimator(). Why is the call made before the assignment > > tp->srtt_us = max(1U, srtt); > > How is the attached eBPF program suppose the get the new value? Take a look at the way tcp_bpf_rtt is invoked. It gets mrtt_us and srtt arguments. Those are passed via bpf_sock_ops args field. See tools/testing/selftests/bpf/progs/tcp_rtt.c. Hope that helps!
