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authorPatrick Trantham <patrick.trantham@fuel7.com>2012-04-13 10:48:15 -0500
committerMartin Sustrik <sustrik@250bpm.com>2012-04-29 07:30:32 +0200
commit98d4e212bc6379888c006aadb89eb1b96e0b3ddb (patch)
treeb7a4468d26d3c4363efbd75b4c49988699bc2cab /src/devpoll.hpp
parent4cd65e7c488379f4f4a719a6400c839b61c61f7c (diff)
Implement atomic operations for armv7a
This commit implements atomic operations for the armv7a architecture using gcc inline assembly. This offers higher performance compared to pthread mutexes. Tested on an am3517 evm, clocked at 600MHz: ./inproc_thr 200 1000000 ------------------------ 53-60K messages / sec, pthread mutexes 73-90K messages / sec, assembly atomic ops ./inproc_lat 200 1000000 ------------------------ average latency: 42.234 [us], pthread mutexes average latency: 35.496 [us], assembly atomic ops
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