[
https://issues.apache.org/jira/browse/YARN-5510?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
He Tianyi reassigned YARN-5510:
-------------------------------
Assignee: He Tianyi
> Optimize Resource implementation for instantiation
> --------------------------------------------------
>
> Key: YARN-5510
> URL: https://issues.apache.org/jira/browse/YARN-5510
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 2.6.0
> Reporter: He Tianyi
> Assignee: He Tianyi
>
> According to YARN-5479, many {{Resource}} instances are created as
> intermediate result of calculating in scheduler (as a result of
> {{Resources.subtract}} and {{Resources.add}}). This introduces pressure on
> garbage collector as well as CPU cycles for scheduling.
> Therefore, the issue proposes a lightweight implementation of {{Resource}},
> which optimized for scheduler usage. That is, making instantiation of
> {{Resource}} cheaper.
> In discussion of {{YARN-5479}}, we thought maybe sticking to one version of
> implementation avoids unnecessary complexity.
> In current implementation {{ResourceImplPB}}, a builder is also created
> during construction. Also, {{maybeInitBuilder}} get called during each
> {{setMemory}} or {{setVirtualCores}}. The {{builder}} get prepared regardless
> whether {{Resource}} will be exchanged via IPC or not.
> However, in scheduler (which performance is critical), most of these
> instances are just intermediate result and not exposed.
> Suppose we could move builder related code into {{getProto}}.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
