franz1981 commented on issue #2523: ARTEMIS-1977 ASYNCIO can reduce sys-calls to retrieve I/O events URL: https://github.com/apache/activemq-artemis/pull/2523#issuecomment-458418530 @michaelandrepearce @clebertsuconic Today I will talk with some of the kernel guys that has written libAIO: I've taken a deep look to https://elixir.bootlin.com/linux/latest/source/fs/aio.c#L1148 and seems that for x86 I could avoid any hardware barriers. `lfence,sfence` are hw barriers needed just when used among non-temporal stores ie that won't use the caches, while temporal x86 stores are guaranteed to not being reordered by the processor. I need to cross-compile the 32 bit version accordly, many thanks to super- @orpiske for his help!
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