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9 Commits (d671e39c93982d318c318fe3c2db9ccb9bbea37d)

Author SHA1 Message Date
Andre Puschmann a7911f0dab pdcp,rlc: refactor SDU queueing policy 
this patch refactors the SDU queuing and dropping policy of the RLC and PDCP layer.
the previous design had issues when packets have been generated at a higher
rate above the PDCP than they could be consumed below the RLC.

When the RLC SDU queues were full, we allowed two policies, one to block on the write
and the other to drop the SDU. Both options are not ideal because they either
lead to a blocking stack thread or to lost PDCP PDUs.

To avoid this, this patch makes the following changes:

* PDCP monitors RLC's SDU queue and drops packets on its north-bound SAP if queues are full
  * a new method sdu_queue_is_full() has been added to the RLC interface for PDCP
* remove blocking write from pdcp and rlc write_sdu() interface
  * all writes into queues need to be non-blocking
  * if Tx queues are overflowing, SDUs are dropped above PDCP, not RLC
* log warning if RLC still needs to drop SDUs
  * this case should be avoided with the monitoring mechanism
 4 years ago
Francisco Paisana 5e06430455 removal of stack handler interface 4 years ago
Andre Puschmann 218fa5cf55 ttcn3_dut: fix bug in DUT 
reducing the sync queue len to 1 caused an issue when the
PHY was locking the mutex while trying to push a TTI event
on the stack.

instead of signaling the new TTI within the PHY, we now do it outside
in the DUT (after releasing the PHY mutex)
 4 years ago
Andre Puschmann c15b2ec810 ttcn3_dut: always create timer when enabling TESTMODE B 
create timer but dont yet set it. this avoid adding multiple
checks if the timer var is actually initialized.
 4 years ago
Andre Puschmann 7f47edf67f fix issue where PDCP SDU was not going through UE stack to SS 
this cause the PDCP echo reply not to appear in MAC/PCAP
 4 years ago
Daniel Willmann 8652f75510 Don't try to guess the lcid, use what we got 4 years ago
Daniel Willmann 31f1516d74 Use callback to establish connection before sending PDUs in TestmodeB 4 years ago
Daniel Willmann 9aa441f8b6 ttcn3_ue::timer_expired(): Loop through the correct queue 
Fixes a segfault when a NULL pdu is passed to loop_back_pdu_with_tft()
 4 years ago
Daniel Willmann 0e99e2f6eb srsue: Refactor definition to live in its own .cc file 4 years ago