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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
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53-60K messages / sec, pthread mutexes
73-90K messages / sec, assembly atomic ops
./inproc_lat 200 1000000
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average latency: 42.234 [us], pthread mutexes
average latency: 35.496 [us], assembly atomic ops
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
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Reverted to using atomic.h on NetBSD
Removed GNU builtins (see http://lists.zeromq.org/pipermail/zeromq-dev/2010-May/003485.html)
Removed SPARC native atomic ops as they are untested and have been commented out for years
Add "memory" to asm clobber for X86 atomic_counter::sub()
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