problem with shem locking/unlocking
This is probably fixed with https://www.ohwr.org/project/wr-switch-sw/issues/8 Yet, it should be tested with scenario that we saw in ELENA:
- in the network there are two nodes with the same MAC address
- the rtu is constantly updating RTU tables (traffic at 250kHz)
- this triggers the shem problem, errors in SYSLOG below
- this results in +80% payload on CPU (warning in graffana)
/wr/bin/wrsw_rtud: Error: Trying to lock already locked shmem on the write end! Sequence number is 877241983. The caller of wrs_shm_write is rtu_fd_age_update /wr/bin/wrsw_rtud: Error: Trying to unlock already unlocked shmem on the write begin! Sequence number is 877241986. The caller of wrs_shm_write is rtu_fd_create_entry