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- Log -----------------------------------------------------------------
http://cgit.osmocom.org/osmo-pcu/commit/?id=27d9f3e9d45a7f7be15cd1b602cb94f8ab057c3e
commit 27d9f3e9d45a7f7be15cd1b602cb94f8ab057c3e
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jul 14 14:29:34 2015 +0200
pcu: Use alloc_algorithm_dynamic by default
The dynamic algorithm behaves like B until there are no TFI left.
This commit changes the default algorithm to to former.
Ticket: #1934
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=563f35eb49be3d7f1ecdc3d230c81fe28315e607
commit 563f35eb49be3d7f1ecdc3d230c81fe28315e607
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jul 14 14:02:41 2015 +0200
alloc: Add counters for successful algo A/B allocations
This adds counters for algorithm A and B with count successful
allocation combined for UL and DL.
Ticket: #1934
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=96a33c74849c8e92fd6e101fc633fdd27891f25e
commit 96a33c74849c8e92fd6e101fc633fdd27891f25e
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jul 14 13:31:48 2015 +0200
alloc: Add 'dynamic' allocation algorithm
The idea behind this meta algorithm is to automatically select one of
the other algorithms based on the system state. Basically algorithm B
will be selected if the PDCH usage is low to improve throughput and
latency. Algorithm A will be selected to support more concurrent MS.
This commit adds a first simple state-less version of this algorithm
that always tries B first and only if that fails A is tried
afterwards.
The following VTY command is added to the 'pcu' node:
- alloc-algorithm dynamic
Ticket: #1934
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=58070d62c88586fda707b88df6d442b480137f78
commit 58070d62c88586fda707b88df6d442b480137f78
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jul 14 12:57:07 2015 +0200
alloc: Remove disabled code fragment for multi-UL allocation
This part of algorithm_b has already been disabled. Further work may
depend on this, but it is going out of sync. So this commit removes
it completely.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=ac4084f0c09fb3df0b1ff4cd0c406cf14b588d7d
commit ac4084f0c09fb3df0b1ff4cd0c406cf14b588d7d
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jul 14 11:35:21 2015 +0200
alloc: Refactor alloc algorithms to only apply changes on success
Currently these algorithms modify other objects (MS, TBF, PDCH) even
if the allocation will fail later on. To implement an algorithm that
dynamically tries another algorithm on failure (e.g. A after B), the
first (failing) algorithm should not change or damage anything.
This commit refactors algorithm A and B to delay the actual allocation
until it is known that the allocation will not fail.
Ticket: #1934
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=8a99b7a87a7fb2940333a45e17fdb452fe485ae1
commit 8a99b7a87a7fb2940333a45e17fdb452fe485ae1
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Tue Jul 14 08:26:17 2015 +0200
alloc: Optionally enforce first common TS in find_multi_slots (TODO)
TODO:
- This isn't probably triggered at all currently, so this commit
can possibly be dropped
http://cgit.osmocom.org/osmo-pcu/commit/?id=b4f2b917c24fe051d05366f78db7d2ccd22bd7ae
commit b4f2b917c24fe051d05366f78db7d2ccd22bd7ae
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jul 13 15:15:18 2015 +0200
alloc: Remove redundant first_common_ts handling
Currently this code path is only used, if an allocation has been
taken place in a former call to an allocation algorithm function.
If this was for an DL TBF, the first common TS was selected,
otherwise the least used common TS was selected for an UL TBF.
The shrinking of the UL set (to 1<<first_common_ts) is done in the
latter case.
This commit removes an additional code path that aligns the UL set to
first_common_ts, because it has no more influence on the set of
common TS after both UL and DL TBF have been allocated.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=4095a641fed649f3a08873963253c2ab262f0281
commit 4095a641fed649f3a08873963253c2ab262f0281
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jul 13 14:50:08 2015 +0200
alloc/test: Add test for interleaved TBF chains
MS iniated TCP connections generally result in a sequence
of short time UL and longer lasting DL TBFs, being interleaved
between several MS. This scenario is not covered by the existing
tests.
This commit adds a test, that allocates as man as possible TBFs
several times with different test modes without clearing the BTS (and
thus the TBF list) in between. The number of allocated DL TBFs in
each round is expected to be constant.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=69c9bfa0897c63b8a220bdb8db6658dc5021e5da
commit 69c9bfa0897c63b8a220bdb8db6658dc5021e5da
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jul 13 14:38:18 2015 +0200
alloc/test: Put TBF allocation loop into alloc_many_tbfs
Currently all TBFs are deleted after the allocation loop finishes.
This make it difficult to interleave the TBF allocation like it
happens with real MS.
This commit refactors the allocation loop into alloc_many_tbfs and
adds support for TLLIs, which are derived from the counter value and
used to retrieve an old MS object if alloc_many_tbfs is called a
second time.
Note that this does not make a difference for the existing tests.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=b2439bbb8a73f00873efd7f744f70be535496e90
commit b2439bbb8a73f00873efd7f744f70be535496e90
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jul 13 14:23:32 2015 +0200
ms: Add is_idle() method to GprsMs::Guard
Currently there is no simple way to determine, whether the MS object
protected by a guard will continue to exist after the guard object is
destroyed.
This patch adds a is_idle() method that will return true if the MS
object is just kept by the guard from being idle. In that case, the
MS object would either be deleted or return true for
GprsMs::is_idle() after the guard's destruction, provided that no
TBF attachment took place in between.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=3a10dbd56428cf0e79b738f62748509bbd04aa68
commit 3a10dbd56428cf0e79b738f62748509bbd04aa68
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Fri Jul 10 19:52:37 2015 +0200
tbf: Put the TFI->TBF mapping into the PDCH objects
Currently the TBFs are registered in a TFI indexed array within the TRX
objects. TBFs can be searched globally by TFI and TRX number. This
conflicts with the use of the same TFI for different TBF on different
PDCH. This use case requires the specification of the PDCH as
additional search dimension.
This commit moves the TFI index TBF arrays into the PDCH objects. The
related methods are updated accordingly.
Ticket: #1793
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=e0853cdf42e60acd7759acd4869c84756eb1fa27
commit e0853cdf42e60acd7759acd4869c84756eb1fa27
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Fri Jul 10 12:25:25 2015 +0200
alloc: Allocate TFI per slot (algorithm A)
Currently the TFI are managed per TRX, thus only a maximum of 32 TBF
per direction and per TRX are possible simultaneously.
This commit modifies algorithm_a() to allow the sharing of TFI
between different PDCH. Since algorithm A only assigns a single slot
to each TBF, the TFI of each PDCH can be assigned independently.
This increases the maximum to 32 TBF per direction and per PDCH
concerning the TFI allocation.
Ticket: #1793
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=5879c6493f74aecddc81abbd785065325bf2e117
commit 5879c6493f74aecddc81abbd785065325bf2e117
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Fri Jul 10 10:41:36 2015 +0200
tbf: Move TFI selection into alloc_algorithm
Currently the TFI and the TRX have to be determined before the actual TBF
allocation function is called, passing TFI and TRX number as
parameters. This does fit to TFI reuse for different slots, since
this were tightly coupled with the slot selection.
This commit just moves the TFI selection into the alloc_algorithm
functions. The tfi parameter is removed from the the TFI alloc
functions. The trx parameter is changed into use_trx to optionally
limit the trx selection (same semantics like in tfi_find_free).
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=47a57f6f869f19704bbb993fc157a86fd0c85e58
commit 47a57f6f869f19704bbb993fc157a86fd0c85e58
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Wed Jul 8 12:53:16 2015 +0200
pdch: Manage TFIs per direction
Currently a single bit set is used to maintain a set of used TFI
without distinguishing between uplink and downlink. Since the
namespaces of UL and DL TFI are separate, this implementation is
not correct.
This commit changes gprs_rlcmac_pdch to use a separate bit set for
each direction. It also replace the corresponding conditional fprintf
statement in check_tfi_usage (AllocTest.cpp) by an equivalent
OSMO_ASSERT.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=61205a7e6539b3926c3039e8dcabda6aa9b408ef
commit 61205a7e6539b3926c3039e8dcabda6aa9b408ef
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 9 11:35:50 2015 +0200
alloc/test: Check for TFI conflicts
This commit adds the check_tfi_usage function that checks the TFI
usage. It iterates through all TBFs, records on which PDCH it uses
which TFI and check for conflicts. It also checks the bits returned
by pdch->assigned_tfi(). The latter suffers from an bug in that
method (no separation of uplink and downlink), so a conditional
fprintf is used instead of an assertion. The method tfi_find_free
is checked for conflicts after allocations.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=57cf69a18ccceac4b250dceb56c4e0d5f0018a95
commit 57cf69a18ccceac4b250dceb56c4e0d5f0018a95
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Wed Jul 8 12:18:33 2015 +0200
alloc: Fix MS_B/MS_C interpretation
Currently the handling of MS_B and MS_C is not compliant with TS
45.002, annex B.1. These values may only interpreted as 0, if
frequency hopping is not enabled and if there is no change from Rx to
Tx or vice-versa.
This commit sets Ttb/Trb to 1 if the table entry is MS_B/MS_C, since
only combined down/up access modes are supported.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=dd08ac86e6fa1ea69e78c344424d72fc9d79d6d7
commit dd08ac86e6fa1ea69e78c344424d72fc9d79d6d7
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 9 12:06:56 2015 +0200
alloc: Do not use masking for multislot class type 2 MS
Currently the masks are computed equally for each class type. This
does not make much sense for class type 2 MS, since those are capable
to work in full duplex mode.
This commit sets the masks to 0xff for class type 2 MS.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=bae33a70019e2344053eae3798856364cdb8aa12
commit bae33a70019e2344053eae3798856364cdb8aa12
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Mon Jul 6 14:55:13 2015 +0200
alloc: Select applicable Tta/Tra
According to TS 45.002, 6.4.2.2 the choice whether Tta or Tra has to
be applied, depends on the medium access mode (currently always
dynamic) and the number of UL/DL slots. Currently either value can be
used which might result in combinations not covered by the spec.
This commit changes find_multi_slots() to skip non-compliant
combinations.
Note that this code will have to be extended, if other medium
access modes are implemented.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=5e46a20e030a71816a20935befadf232968e1ff6
commit 5e46a20e030a71816a20935befadf232968e1ff6
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 9 11:48:23 2015 +0200
alloc: Use an enum instead of numbers to select the mask
The local enums MASK_TT and MASK_TR replace the hard coded indices.
The variable m_idx is renamed to mask_sel for more clarity.
Sponsored-by: On-Waves ehf
http://cgit.osmocom.org/osmo-pcu/commit/?id=c135b878cd7a155431b4f000e9c00be07e157222
commit c135b878cd7a155431b4f000e9c00be07e157222
Author: Jacob Erlbeck <jerlbeck at sysmocom.de>
Date: Thu Jul 9 13:44:18 2015 +0200
alloc: Merge find_least_busy_pdch and find_least_reserved_pdch
Both functions only differ in the computation of the value for
num_tbfs.
This commit merge both functions and adds a parameter containing a
function for that compuation.
Sponsored-by: On-Waves ehf
-----------------------------------------------------------------------
Summary of changes:
src/sba.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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