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Posted to dev@qpid.apache.org by "Robbie Gemmell (Jira)" <ji...@apache.org> on 2020/11/12 12:27:00 UTC

[jira] [Updated] (PROTON-1496) epoll proactor - improved timers implementation with single timerfd kernel resource

     [ https://issues.apache.org/jira/browse/PROTON-1496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robbie Gemmell updated PROTON-1496:
-----------------------------------
    Summary: epoll proactor - improved timers implementation with single timerfd kernel resource  (was: C epoll proactor needs better timer implementation for connections)

> epoll proactor - improved timers implementation with single timerfd kernel resource
> -----------------------------------------------------------------------------------
>
>                 Key: PROTON-1496
>                 URL: https://issues.apache.org/jira/browse/PROTON-1496
>             Project: Qpid Proton
>          Issue Type: Improvement
>          Components: proton-c
>    Affects Versions: proton-c-0.18.0, proton-c-0.32.0
>         Environment: Linux environments with epoll support
>            Reporter: Clifford Jansen
>            Assignee: Clifford Jansen
>            Priority: Major
>             Fix For: proton-c-0.33.0
>
>
> The epoll proactor allocates a timerfd per connection.  This is a convenience for the initial implementation and may surprise some applications running into system limits on file descriptors twice as fast as expected.
> The timer is used for heartbeats.  It should be possible to write a per-proactor heartbeat timer that is shared among the connections



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