clebertsuconic commented on a change in pull request #2523: ARTEMIS-1977
ASYNCIO can reduce sys-calls to retrieve I/O events
URL: https://github.com/apache/activemq-artemis/pull/2523#discussion_r251130524
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File path:
artemis-native/src/main/c/org_apache_activemq_artemis_jlibaio_LibaioContext.c
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@@ -57,6 +57,92 @@ struct io_control {
};
+//These should be used to check if the user_io_getevents is supported, but
almost every modern kernel support it
+#define AIO_RING_MAGIC 0xa10a10a1
+#define AIO_RING_INCOMPAT_FEATURES 0
+//memory order relaxed/acquire/release/seq_cst x86_64 fences implementations
+#define mem_barrier() __asm__ __volatile__ ("":::"memory")
+#define read_barrier() __asm__ __volatile__("lfence":::"memory")
+#define store_barrier() __asm__ __volatile__("sfence":::"memory")
+#define full_barrier() __asm__ __volatile__("mfence":::"memory")
+
Review comment:
Is there any documentation about this?
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