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https://issues.apache.org/jira/browse/ARTEMIS-1977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539754#comment-16539754
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Francesco Nigro edited comment on ARTEMIS-1977 at 7/11/18 9:04 AM:
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Currently there are low-latency DBMS that support this feature with success:
[https://groups.google.com/forum/#!msg/seastar-dev/DSXC5UcIsTg/LD13i1vmAAAJ;context-place=topic/seastar-dev/zdr01znzUes].
The next step is to expose through JNI this feature and allow an even loop
style of processing of I/O events, possibly lock-free and with smart batching
to reduce the submit sys-calls without impacting on latencies.
was (Author: nigro....@gmail.com):
Currently there are low-latency DBMS that support this feature with success:
[PATCH seastar v2 2/6 linux-aio: try to perform io_getevents in
userspace|[https://groups.google.com/forum/#!msg/seastar-dev/DSXC5UcIsTg/LD13i1vmAAAJ;context-place=topic/seastar-dev/zdr01znzUes]]
The next step is to expose through JNI this feature and allow an even loop
style of processing of I/O events, possibly lock-free and with smart batching
to reduce the submit sys-calls without impacting on latencies.
> ASYNCIO can reduce sys-calls to retrieve I/O completion events
> --------------------------------------------------------------
>
> Key: ARTEMIS-1977
> URL: https://issues.apache.org/jira/browse/ARTEMIS-1977
> Project: ActiveMQ Artemis
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 2.6.2
> Reporter: Francesco Nigro
> Assignee: Francesco Nigro
> Priority: Minor
> Fix For: 2.7.0
>
>
> On LibAIO is possible to retrieve the I/O completion events without
> using io_getevents sys-calls by reading the user-space ring buffer used by the
> kernel to store them.
> This is already beneficial for very fast disks and necessary for further
> improvements
> of ASYNCIO Journal to leverage (very) fast low-latency disks by going
> completly
> lock-free.
>
>
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