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commit 0eabffdc35bef3bb678014d4c377ab8a2ac5951f Author: Jacob Erlbeck jerlbeck@sysmocom.de Date: Mon Mar 2 14:28:12 2015 +0100

sched: Modify DL scheduling to use different priorities

Currently the DL blocks are scheduled round robin to each TBF that is either in state FLOW or FINISHED and not waiting for an IMM.ASS confirmation. This way, if single blocks has been NACK'ed by the MS and the PCU has already resent the missing packets, the PCU starts retransmitting them until it has received an ACK/NACK even if other TBF have RLC blocks that need to be transmitted.

This commit changes sched_select_downlink to select the next TBF with the highest priority, where blocks that are going to be resent again have a lower priority unless the window is stalling. If there is only one TBF the old behaviour is kept, since there is no other TBF that can have a higher priority.

If there is much packet loss on a single phone, this modification can lead to a higher latency for that MS.

Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/osmo-pcu/commit/?id=1842c921b3ed5c941a092542b922274c...

commit 1842c921b3ed5c941a092542b922274c535111a9 Author: Jacob Erlbeck jerlbeck@sysmocom.de Date: Mon Mar 2 13:01:35 2015 +0100

tbf: Reduce m_new_tbf logging messages

Currently tbf->m_new_tbf may point to itself if no new TBF is assigned. But this leads to additional logging messages, since the code in set_new_tbf and tbf_free assumes, that a real new TBF is assigned and generates log messages accordingly.

This commit adds checks to avoid those messages in the above case.

Sponsored-by: On-Waves ehf

http://cgit.osmocom.org/osmo-pcu/commit/?id=adcdf150a63b3fe13dd933fca9f51974...

commit adcdf150a63b3fe13dd933fca9f51974f40aeede Author: Jacob Erlbeck jerlbeck@sysmocom.de Date: Tue Mar 3 14:45:55 2015 +0100

tbf: Add name() method and put the buf into the tbf

Currently tbf_name() must not be used twice in a printf statement with different TBFs, since the same baffer will be used for each.

This commit puts the text buffer into struct gprs_rlcmac_tbf to avoid this problem.

Sponsored-by: On-Waves ehf

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Summary of changes: src/gprs_rlcmac_sched.cpp | 29 +++++++++++++++++++----- src/tbf.cpp | 56 +++++++++++++++++++++++++++++------------------ src/tbf.h | 5 +++++ tests/tbf/TbfTest.err | 6 ++--- 4 files changed, 65 insertions(+), 31 deletions(-)

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