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Feature #5755
openio_uring support in osmo-bsc
Start date:
11/09/2022
Due date:
% Done:
80%
Spec Reference:
Description
Once libosmocore provides the new API for the upcoming io_uring backend (#5751) we will need to port osmo-bsc over to this new API.
Some I/O is done directly by osmo-bsc, while other I/O is done via libaries such as libosmo-sigtran, libosmo-netif, libosmo-mgcp-client. There are separate tickets for porting over those libraries. Once that has happened, there might also be API changes for osmo-bsc to catch up with.
Currently we're using the following code-paths for I/O
| osmo-bsc function | I/O function | provided by |
|---|---|---|
| bsc_sccplite_mgcp_proxy_cb | recv | - |
| bsc_sccplite_rx_mgcp | send | - |
| cbsp_srv_cb/cbsp_client_read_cb | osmo_cbsp_recv_buffered | libosmocore |
| cbsp_tx_decoded | osmo_stream_{cli,srv}_send | libosmo-netif |
| Abis interface | - | libosmo-abis |
| A+Lb interface | - | libosmo-sigtran |
| VTY interface | - | libosmo-vty |
| CTRL interface | - | libosmo-ctrl |
We need to analyze each of those and migrate, if possible.
There is also some other I/O like meas_feed, pcu_sock rf_ctrl which are not performance critical and hence can stay like they are and are not further discussed here.
Checklist
- A+Lb interface via libosmo-sigtran
- Abis interface via libosmo-abis
- CBSP interface
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