Change in osmo-bts[master]: osmo-bts-trx: distinguish 11-bit Access Bursts by synch. sequence

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Vadim Yanitskiy gerrit-no-reply at lists.osmocom.org
Thu May 9 16:47:49 UTC 2019


Vadim Yanitskiy has posted comments on this change. ( https://gerrit.osmocom.org/13723 )

Change subject: osmo-bts-trx: distinguish 11-bit Access Bursts by synch. sequence
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Patch Set 5:

> I would appreciate if you remove comparison [...]

We also discussed this at OsmoDevCon with Harald, and as it turns out, modern compilers can perfectly optimize out this comparison (i.e. the cmp instruction), since it's a static function and the synch. sequences are defined as a static array. We've compiled OsmoBTS with clang-8 and checked the results using 'objdump -d -S'.

However, it doesn't mean that I'm against removing the comparison. This is simply not the main problem at the moment. Thanks again for your comments and tips, the initial version of this change was much worse from performance point of view...


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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ibb6d27c6589965c8b59a6d2598a7c43fd860f284
Gerrit-Change-Number: 13723
Gerrit-PatchSet: 5
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Alexander Chemeris <Alexander.Chemeris at gmail.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder (1000002)
Gerrit-Reviewer: Pau Espin Pedrol <pespin at sysmocom.de>
Gerrit-Reviewer: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-CC: Max <suraev at alumni.ntnu.no>
Gerrit-Comment-Date: Thu, 09 May 2019 16:47:49 +0000
Gerrit-HasComments: No
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