[jira] [Work logged] (ARTEMIS-1977) ASYNCIO can reduce sys-calls to retrieve I/O events

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARTEMIS-1977?focusedWorklogId=190101&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-190101 ]

ASF GitHub Bot logged work on ARTEMIS-1977:
-------------------------------------------

                Author: ASF GitHub Bot
            Created on: 25/Jan/19 16:52
            Start Date: 25/Jan/19 16:52
    Worklog Time Spent: 10m 
      Work Description: franz1981 commented on pull request #2523: ARTEMIS-1977 ASYNCIO can reduce sys-calls to retrieve I/O events
URL: https://github.com/apache/activemq-artemis/pull/2523
 
 
   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 commit include another optimization to avoid
   calling a method to obtain the buffers address, saving
   safepoint polls, a method call and implicit instance of
   checks performed.
 
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 190101)
            Time Spent: 10m
    Remaining Estimate: 0h

> ASYNCIO can reduce sys-calls to retrieve I/O 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
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> 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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