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https://issues.apache.org/jira/browse/YARN-9096?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Szilard Nemeth updated YARN-9096:
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Attachment: YARN-9096.002.patch
> Some GpuResourcePlugin and ResourcePluginManager methods are synchronized
> unnecessarily
> ---------------------------------------------------------------------------------------
>
> Key: YARN-9096
> URL: https://issues.apache.org/jira/browse/YARN-9096
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Szilard Nemeth
> Assignee: Szilard Nemeth
> Priority: Major
> Attachments: YARN-9096.001.patch, YARN-9096.002.patch
>
>
> These methods are not used concurrently, they are part of the initialization
> code of NM that happens from one thread.
> This is the list of the call hierarchies:
> 1. GpuResourcePlugin.initialize + ResourcePluginManager.initialize
>
> {code:java}
> GpuResourcePlugin.initialize(Context)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu)
> ResourcePluginManager.initialize(Context)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin)
> NodeManager.serviceInit(Configuration)
> (org.apache.hadoop.yarn.server.nodemanager){code}
>
>
> 2. GpuResourcePlugin.createResourceHandler:
>
> {code:java}
> GpuResourcePlugin.createResourceHandler(Context, CGroupsHandler,
> PrivilegedOperationExecutor)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu)
> ResourceHandlerModule.addHandlersFromConfiguredResourcePlugins(List,
> Configuration, Context)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources)
> ResourceHandlerModule.initializeConfiguredResourceHandlerChain(Configuration,
> Context)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources)
> ResourceHandlerModule.getConfiguredResourceHandlerChain(Configuration,
> Context)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources)
> ContainerScheduler.serviceInit(Configuration)
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.scheduler)
> LinuxContainerExecutor.init(Context)
> (org.apache.hadoop.yarn.server.nodemanager)
> {code}
>
> 3. GpuResourcePlugin.getNodeResourceHandlerInstance:
>
> {code:java}
> GpuResourcePlugin.getNodeResourceHandlerInstance()
> (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu)
> NodeStatusUpdaterImpl.updateConfiguredResourcesViaPlugins(Resource)(2 usages)
> (org.apache.hadoop.yarn.server.nodemanager)
> NodeStatusUpdaterImpl.serviceInit(Configuration)
> (org.apache.hadoop.yarn.server.nodemanager)
> {code}
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