| Age | Commit message (Collapse) | Author |
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Reduce the stack usage by replacing the mOCT6100_RETRIEVE_NLP_CONF_DWORD
and mOCT6100_SAVE_NLP_CONF_DWORD macros with functions. Some compilers
do a better job of optimizing the local variables declared in those
macros than others.
For example, with gcc 4.3.0, running
]# make stackcheck | grep Oct6100 | head -n 20 | sed -e 's/^0\S* //g' | uniq
Before:
Oct6100ApiWriteVqeNlpMemory [wct4xxp]: 1112
Oct6100ApiInvalidateChanPlayoutStructs [wct4xxp]:520
Oct6100ApiSetChannelLevelControl [wct4xxp]: 392
Oct6100ApiBridgeEventRemove [wct4xxp]: 344
Oct6100ApiDebugChannelOpen [wct4xxp]: 312
Oct6100ApiWriteVqeAfMemory [wct4xxp]: 296
Oct6100ApiSetChannelTailConfiguration [wct4xxp]:264
Oct6100ApiRandomMemoryWrite [wct4xxp]: 248
Oct6100ApiTransferToneEvents [wct4xxp]: 248
Oct6100ApiModifyChannelStructs [wct4xxp]: 232
After:
Oct6100ApiBridgeEventRemove [wct4xxp]: 344
Oct6100ApiDebugChannelOpen [wct4xxp]: 312
Oct6100ApiRandomMemoryWrite [wct4xxp]: 248
Oct6100ApiTransferToneEvents [wct4xxp]: 248
Oct6100ApiInvalidateChanPlayoutStructs [wct4xxp]:248
Oct6100ApiModifyChannelStructs [wct4xxp]: 232
Oct6100ApiBridgeRemoveParticipantFromChannel [wct4xxp]:216
Oct6100ApiWriteVqeNlpMemory [wct4xxp]: 200
Oct6100ApiInitChannels [wct4xxp]: 168
Oct6100ApiProgramNLP [wct4xxp]: 168
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9751 a0bf4364-ded3-4de4-8d8a-66a801d63aff
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This saves ~300K of kernel memory for each quad or dual span VPM. Due
to the fact that this change disables caching of the NLP words (among
other things), the time to disable the echocans appears to have
increased by ~1ms.
Before this change:
=======================================================================
0) ! 356.498 us | vpm450m_setecmode(); <--- disable
0) ! 387.762 us | vpm450m_setecmode(); <--- enable
0) ! 429.839 us | vpm450m_setecmode(); <--- disable
]# echo 1 > /proc/sys/vm/drop_caches && free -k
total used free shared buffers cached
Mem: 2005352 228368 1776984 0 132
5540
-/+ buffers/cache: 222696 1782656
Swap: 983036 0 983036
After this change:
=======================================================================
0) ! 1109.515 us | vpm450m_setecmode(); <--- disable
0) ! 339.017 us | vpm450m_setecmode(); <--- enable
0) ! 1431.460 us | vpm450m_setecmode(); <--- disable
]# echo 1 > /proc/sys/vm/drop_caches && free -k
total used free shared buffers cached
Mem: 2005352 228080 1777272 0 112
5484
-/+ buffers/cache: 222484 1782868
Swap: 983036 0 983036
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9750 a0bf4364-ded3-4de4-8d8a-66a801d63aff
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From http://svn.digium.com/svn/octasic_api/oct612x/tags/PR49-03/software@44
This is only currently maintained as part of DAHDI linux so it makes sense to
have it directly in DAHDI linux.
This obliterates any chance of having 0 checkpatch.pl errors between the
2.3.0 and 2.4.0 releases. Oh well...
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9138 a0bf4364-ded3-4de4-8d8a-66a801d63aff
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