[M] Change in osmocom-bb[master]: trx_toolkit/udp_link: Optimize UDPLink.send

Attention is currently required from: laforge. kirr has posted comments on this change by kirr. ( https://gerrit.osmocom.org/c/osmocom-bb/+/40055?usp=email ) Change subject: trx_toolkit/udp_link: Optimize UDPLink.send ...................................................................... Patch Set 2: (1 comment) Patchset: PS2: Harald, thanks for feedback. Current epoll + send/recv seems to be enough for BTS + 1-2-3 Ms, but if we are to go with more Ms it might indeed be better to optimize more. In my experience most of the overhead was in python-related wrapping, but once that is removed it indeed the IO syscalls that will become the bottleneck. We do not forward a lot of data, as GSM bursts are small, but we do forward a lot of packets, as each GSM burst is being sent via 1 UDP message and to keep the forarding latency minimal we cannot coalesce those messages even for different slots in the same GSM frame. So using io_uring might indeed make sense at some point. When/if we are to do that I would suggest to cosider using libosmocore directly instead of going through additional third-party library. It should hopefully easy to do that from Cython. Kirill -- To view, visit https://gerrit.osmocom.org/c/osmocom-bb/+/40055?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings?usp=email Gerrit-MessageType: comment Gerrit-Project: osmocom-bb Gerrit-Branch: master Gerrit-Change-Id: I83204545066a925dadbcd0b72cbbc2e3407129fe Gerrit-Change-Number: 40055 Gerrit-PatchSet: 2 Gerrit-Owner: kirr <kirr(a)nexedi.com> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: laforge <laforge(a)osmocom.org> Gerrit-CC: fixeria <vyanitskiy(a)sysmocom.de> Gerrit-CC: osmith <osmith(a)sysmocom.de> Gerrit-CC: pespin <pespin(a)sysmocom.de> Gerrit-Attention: laforge <laforge(a)osmocom.org> Gerrit-Comment-Date: Sun, 20 Apr 2025 13:16:32 +0000 Gerrit-HasComments: Yes Gerrit-Has-Labels: No Comment-In-Reply-To: laforge <laforge(a)osmocom.org>