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The branch, jerlbeck/wip/pdch-alloc has been updated
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- Log -----------------------------------------------------------------
http://cgit.osmocom.org/osmo-pcu/commit/?id=410d98e5d0c0eae76221a2d62a837b962f082506
commit 410d98e5d0c0eae76221a2d62a837b962f082506
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 15:48:25 2015 +0200
alloc: Use least reserved PDCH for algo A (TODO)
TODO:
- unify find_least_reserved_pdch and find_least_busy_pdch or
- force find_multi_slots to single slot reservation
http://cgit.osmocom.org/osmo-pcu/commit/?id=eff0c350c848c642efad7ebe478a52c2c8c351ce
commit eff0c350c848c642efad7ebe478a52c2c8c351ce
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 15:10:20 2015 +0200
Revert "ms: Delay the call to set_reserved_slots(NULL, 0,0) (EXPERIMENTAL)"
This reverts commit 341c9189caf00c077ef73138d087bf29e3ae12d1.
http://cgit.osmocom.org/osmo-pcu/commit/?id=a0ea29a5968308224b24b8718a8baa09806ad645
commit a0ea29a5968308224b24b8718a8baa09806ad645
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 14:35:57 2015 +0200
FIXUP bts: Add Poll Timeout counter (TODO)
http://cgit.osmocom.org/osmo-pcu/commit/?id=bdcfb71161aed1dd882ec7f9dcc4880146175155
commit bdcfb71161aed1dd882ec7f9dcc4880146175155
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 13:19:49 2015 +0200
sba: Reverse TS search order (TODO)
- when using multiple TS the first TS cannot be used for UL
eventually if a TBF is still active or releasing.
- Currently RACH requests are often accompanied by poll timeouts
- This cannot prevent them completely (especially with multiple TRX
in the future)
http://cgit.osmocom.org/osmo-pcu/commit/?id=70960fb90cf4ab5efa2851f6927e53bb14878512
commit 70960fb90cf4ab5efa2851f6927e53bb14878512
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 12:54:26 2015 +0200
bts: Add Poll Timeout counter (TODO)
http://cgit.osmocom.org/osmo-pcu/commit/?id=9eb88f2348ce449deac1022950998ecef372a67b
commit 9eb88f2348ce449deac1022950998ecef372a67b
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 12:34:26 2015 +0200
tbf: Remove call to update() in reuse_tbf (TODO)
http://cgit.osmocom.org/osmo-pcu/commit/?id=5ef6a6028a1ed8aa59d3b2a701d53e4737c15478
commit 5ef6a6028a1ed8aa59d3b2a701d53e4737c15478
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 12:04:20 2015 +0200
tbf: Set ms in call to tbf_alloc_dl_tbf (TODO)
- reuse
- alloc didn't know slot reservation
TODO:
- cm
http://cgit.osmocom.org/osmo-pcu/commit/?id=341c9189caf00c077ef73138d087bf29e3ae12d1
commit 341c9189caf00c077ef73138d087bf29e3ae12d1
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 10:48:09 2015 +0200
ms: Delay the call to set_reserved_slots(NULL, 0,0) (EXPERIMENTAL)
TODO:
- Check whether this fixes the issues.
http://cgit.osmocom.org/osmo-pcu/commit/?id=f5082f9372efa00090519a1b133b7eee88ea0d61
commit f5082f9372efa00090519a1b133b7eee88ea0d61
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 2 10:47:37 2015 +0200
ms: Clear the reserved slots in the destructor (FIXUP)
http://cgit.osmocom.org/osmo-pcu/commit/?id=6b3a27be054a2cc4667a22a4c435cd5d7ecb59ce
commit 6b3a27be054a2cc4667a22a4c435cd5d7ecb59ce
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 14:48:13 2015 +0200
alloc: Disable inner loop debugging by default (TODO)
Callgrind: 42%-> 25%
http://cgit.osmocom.org/osmo-pcu/commit/?id=596f547a378786b2a9dea5a3b1e6182abf794e60
commit 596f547a378786b2a9dea5a3b1e6182abf794e60
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 14:34:24 2015 +0200
alloc: Optimize find_free_usf
According to callgrind, this function consumes 33% CPU when running
the AllocTest program.
This commit uses the assigned_usf() method to get the USFs allocated
by a PDCH instead of traversing the TBFs.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=eb22ef5c755a3bacda653185f4ce63402bd95d93
commit eb22ef5c755a3bacda653185f4ce63402bd95d93
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 14:10:13 2015 +0200
tbf: Keep a set of used TFI and USF per PDCH (TODO)
http://cgit.osmocom.org/osmo-pcu/commit/?id=1e64bdbe3f7304fe5c5098ae0738d1ff06f14ad1
commit 1e64bdbe3f7304fe5c5098ae0738d1ff06f14ad1
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 13:43:52 2015 +0200
FIXUP tbf: Maintain the number of TBF per PDCH
http://cgit.osmocom.org/osmo-pcu/commit/?id=4d4fb6597592dc16795868ab24cb9063765c5fb9
commit 4d4fb6597592dc16795868ab24cb9063765c5fb9
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 13:40:18 2015 +0200
alloc: Skip common TS without free USF when rating (TODO)
http://cgit.osmocom.org/osmo-pcu/commit/?id=8cee5c6d06ebc743414df3b3d8ea4af462db0851
commit 8cee5c6d06ebc743414df3b3d8ea4af462db0851
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Wed Jul 1 13:10:41 2015 +0200
alloc: Only reserve 1 UL slot with algorithm B (TODO)
Since currently the algorithm B will only allocate a single UL slot
and will have to stick to it (first common TS), the other possible UL
slots will not be allocated while the reservation is kept.
This commit adds code to update the reserved set of UL slots to the
single common TS when the UL TBF is allocated.
TODO:
- test it
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=53cf1d4da78852cc168246cca1f4caa7e9acf837
commit 53cf1d4da78852cc168246cca1f4caa7e9acf837
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Wed Jul 1 12:27:30 2015 +0200
alloc: Set minimum slot capacity to 1 (TODO)
- < 0 can only happen rarely (if at all ATM)
- doesn't change anything
TODO:
- test it anyway
http://cgit.osmocom.org/osmo-pcu/commit/?id=3ac16ddac029d00f71bfe722cb25d66c26961fc7
commit 3ac16ddac029d00f71bfe722cb25d66c26961fc7
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Wed Jul 1 12:19:40 2015 +0200
alloc: Only use common UL slots when calculating the capacity
Currently al possible UL slots are included in the capacity
calculation which is the base of the slot selection. Nevertheless
UL-only slots will never be used, since only one uplink slot (which
must be a common slot) will be used.
This patch changes the code to only include common slots in the
capacity sum.
Note that this might not be optimal if algorithm B supported
multiple uplink slots.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=0bb98075f4046e55c48478520752b09f71b545e0
commit 0bb98075f4046e55c48478520752b09f71b545e0
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 22 16:14:23 2015 +0200
WIP Algorithm B UL (TODO)
Select UL slot based on slot usage (similar to algorithm A)
- Ensure to keep the first common TS
TODO:
- cm
http://cgit.osmocom.org/osmo-pcu/commit/?id=3c9fcfadc825256987ecb259b793c2f85ed5d21c
commit 3c9fcfadc825256987ecb259b793c2f85ed5d21c
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 10:24:37 2015 +0200
alloc: Base algo A on reserved PDCHs
Currently algorithm A bases its time slots selection on the number of
TBF actively using the PDCHs. This statistically prefers the first
time slots, especially with short living TBFs. So when the first TBF
is triggered by an uplink transfer (which generally results in a
short-lived TBF) the potentially longer living DL TBF will be bound
to the same slot. When another MS then requests an uplink TBF, it
will get the same slot (no UL TBF currently active).
This commit changes the algorithm to base its selection on reserved
slots instead.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=ea061943e0d4179822224d7830d0f147ce90ba2c
commit ea061943e0d4179822224d7830d0f147ce90ba2c
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 09:44:05 2015 +0200
alloc: Ignore slots with differing TSC if multiple slots are requested
According to TS 45.002, 6.4.2 the training sequence (TSC) must be the
same for all slots in a multi-slot set.
This commit updates find_possible_pdchs() to only consider slots with
the same TSC if more that 1 slot shall be assigned.
Note that the first PDCH's TSC will be used as reference, so if two
or more groups with a common TSC are configured, only the first will
be used. This restriction does not apply to algorithm A, since it
will not assign more than one slot and therefore sets the max_slots
parameter to 1.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=bbdca1b43caaa47ae71e35872909c25ffc091900
commit bbdca1b43caaa47ae71e35872909c25ffc091900
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 09:18:30 2015 +0200
ms: Get the set of slots currently active
This commits adds methods to GprsMs and gprs_rlcmac_tbf to retrieve
the slots that are actively used.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=b70f7ca553b4747618383b5c631f7023dc0b2f84
commit b70f7ca553b4747618383b5c631f7023dc0b2f84
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jun 30 08:52:54 2015 +0200
ms: Add support for slot reservation
In contrast to the slots currently used by existing TBFs, the
reserved slots refer to the time slots that can be used for newly
allocated TBFs without causing conflicts (given that the first common
TS does not change). They correspond to the potential use of the
PDCHs and can be used to achieve a more uniform slot allocation.
This commit adds bit set based methods to GprsMs and gprs_rlcmac_trx
and a counter to gprs_rlcmac_pdch. The current TRX will also be
stored in the MS object.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=7e32903033af3f93dfe397e55de549870747d62c
commit 7e32903033af3f93dfe397e55de549870747d62c
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Fri Jun 19 16:35:38 2015 +0200
alloc: Load balancing for algo A
Currently only the first enabled PDCH will be used. Beside the
throughput this will also limit the number of TBFs:
- number of UL TBFs <= 7
- number of DL TBFs <= 32
This commit changes the allocation algorithm to use the PDCH with the
least number of attached TBFs. This will improve the troughput in
both directions and the UL limits:
- number of UL TBFs <= min(32, N_PDCH * 7) UL TBFs
Ticket: #1794
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=3e4ac92f79446378fc4c4697d8f31ea1cdb6eafb
commit 3e4ac92f79446378fc4c4697d8f31ea1cdb6eafb
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 14:18:46 2015 +0200
ms: Add tbf() method to get the TBF based on the direction
To avoid the need for a switch or conditional statement when needing
a TBF from an MS object in direction independant code, this method
contains that case distinction. For additional flexibility, a
reverse() function is added to get the opposite direction.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=6f9587bd091ff95c7150646920bc3c8b1ea14d3b
commit 6f9587bd091ff95c7150646920bc3c8b1ea14d3b
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 14:05:55 2015 +0200
ms: Add first_common_ts method to GprsMs
This method gets the index (0 based) of first common time slot used
by the TBFs attach to it. It expects that all of them have the same
notion of this. If no TBF is attached, -1 will be returned.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=6eca14991030ee87c9370c46d719e22763a65609
commit 6eca14991030ee87c9370c46d719e22763a65609
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 13:45:05 2015 +0200
tbf: Maintain the number of TBF per PDCH
Currently the PDCH object do not know anything about the TBFs using
them. To make the slot allocation load dependant, at least some
numbers are required.
This commit adds TBF counters (one per direction) and the related methods
attach_tbf, detach_tbf, and num_tbfs to gprs_rlcmac_pdch.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=8fb193a04767967350fd63501f2f46e8da3f1a66
commit 8fb193a04767967350fd63501f2f46e8da3f1a66
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 13:30:43 2015 +0200
tbf: Update the new TBF in tbf_reuse (TODO)
Currently the old TBF is updated for reallocation in tbf_reuse().
This commit changes this to update the new TBF instead.
TODO:
- does this make sense?
- does this fix anything?
- should the call to update() be removed completely there?
http://cgit.osmocom.org/osmo-pcu/commit/?id=6ec4b962ba8be347708f3c4c3d3f1062ba1ffc91
commit 6ec4b962ba8be347708f3c4c3d3f1062ba1ffc91
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 13:03:46 2015 +0200
tbf/test: Add assertions
These assertions check for the TBF allocation result before the tbf
object is dereferenced the first time.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=8b5add11527ee7108d0f11cf55d972651a4a0eb1
commit 8b5add11527ee7108d0f11cf55d972651a4a0eb1
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 13:00:20 2015 +0200
alloc/test: Use LOGL_DEBUG environment variable
When this environment variable is set, the logging level is set to
LOGL_DEBUG to help debugging without putting everything into
AllocTest.err.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=8f37bfe3abfaeda30de7f1f2f813c7b9b20f39ac
commit 8f37bfe3abfaeda30de7f1f2f813c7b9b20f39ac
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 12:45:11 2015 +0200
alloc/test: Enhance test_alloc_a
This commit adds:
- an assertion to check that count is valid,
- an assertion the verify that tbf_alloc did not fail
- a slots parameter to specify the enabled slots
- additional test invocations with more slots enabled
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=edcab1a0be452d8c977e35783ce489beb82da099
commit edcab1a0be452d8c977e35783ce489beb82da099
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jun 29 12:19:52 2015 +0200
alloc/test: Add test for successive allocation
This test allocates as many as possible UL/DL TBF pairs, shows their
PDCH usage, and checks how many of them has been created
successfully.
Sponsored-by: On-Waves ehf
-----------------------------------------------------------------------
Summary of changes:
src/bts.cpp | 31 +-
src/bts.h | 24 ++
src/gprs_ms.cpp | 2 +
src/gprs_rlcmac_ts_alloc.cpp | 802 +++++++------------------------------------
src/llc.h | 2 +-
src/pcu_vty.c | 2 +-
src/sba.cpp | 4 +-
src/tbf.cpp | 8 +
src/tbf_dl.cpp | 6 +-
tests/alloc/AllocTest.cpp | 44 ++-
tests/alloc/AllocTest.err | 7 +
tests/alloc/AllocTest.ok | 241 ++++++++++---
tests/llc/LlcTest.cpp | 20 +-
tests/ms/MsTest.cpp | 3 +
tests/tbf/TbfTest.cpp | 12 +
tests/tbf/TbfTest.err | 116 +++----
tests/tbf/TbfTest.ok | 2 +
17 files changed, 502 insertions(+), 824 deletions(-)
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