Harald Welte
352b967d1b
Converting from osmo_fd to osmo_io allows us to switch to the new io_uring backend and benefit from related performance benefits. In a benchmark running 200 concurrent bi-directional voice calls with GSM-EFR codec, I am observing: * the code before this patch uses 40..42% of a single core on a Ryzen 5950X at 200 calls (=> 200 endpoints with each two connections) * no increase in CPU utilization before/after this patch, i.e. the osmo_io overhead for the osmo_fd backend is insignificant compared to the direct osmo_fd mode before * an almost exactly 50% reduction of CPU utilization when running the same osmo-mgw build with LIBOSMO_IO_BACKEND=IO_URING - top shows 19..21% for the same workload instead of 40..42% with the OSMO_FD default backend. * An increase of about 4 Megabytes in both RSS and VIRT size when enabling the OSMO_IO backend. This is likely the memory-mapped rings. No memory leakage is observed when using either of the backends. Change-Id: I8471960d5d8088a70cf105f2f40dfa5d5458169a |
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