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https://issues.apache.org/jira/browse/FLINK-18990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Roman Khachatryan updated FLINK-18990:
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Description:
Curently, channel state is read not sequentially.
Inverting control would make it more efficient.
Current call chain:
{code:java}
StreamTask.readRecoveredChannelState
ResultPartition.readRecoveredState - loop through subpartitions
PipelinedSubpartition.readRecoveredState - loop while have data;
bufferBuilder =
parent.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
ChannelStateReader.readOutputData {code}
Proposed call chain:
{code:java}
StreamTask.readRecoveredChannelState
ChannelStateReader.readOutputData loop through state handles ordererd by
handle, offset
request buffer in the same way: BufferBuilder bufferBuilder =
resPart.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
pass to resPart.getSubpartition(idx).add(BufferConsumer, boolean,
boolean)
{code}
Depends on FLINK-18989
was:
Curently, channel state is read not sequentially.
Inverting control would make it more efficient.
Current call chain:
{code:java}
StreamTask.readRecoveredChannelState
ResultPartition.readRecoveredState - loop through subpartitions
PipelinedSubpartition.readRecoveredState - loop while have data;
bufferBuilder =
parent.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
ChannelStateReader.readOutputData {code}
Proposed call chain:
{code:java}
StreamTask.readRecoveredChannelState
ChannelStateReader.readOutputData loop through state handles ordererd by
handle, offset
request buffer in the same way: BufferBuilder bufferBuilder =
resPart.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
pass to resPart.getSubpartition(idx).add(BufferConsumer, boolean, boolean)
{code}
Depends on FLINK-18989
> Optimize reading ResultSubpartition state
> -----------------------------------------
>
> Key: FLINK-18990
> URL: https://issues.apache.org/jira/browse/FLINK-18990
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Task
> Reporter: Roman Khachatryan
> Assignee: Roman Khachatryan
> Priority: Major
> Fix For: 1.12.0
>
>
> Curently, channel state is read not sequentially.
> Inverting control would make it more efficient.
> Current call chain:
> {code:java}
> StreamTask.readRecoveredChannelState
> ResultPartition.readRecoveredState - loop through subpartitions
> PipelinedSubpartition.readRecoveredState - loop while have data;
> bufferBuilder =
> parent.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
> ChannelStateReader.readOutputData {code}
> Proposed call chain:
> {code:java}
> StreamTask.readRecoveredChannelState
> ChannelStateReader.readOutputData loop through state handles ordererd by
> handle, offset
> request buffer in the same way: BufferBuilder bufferBuilder =
> resPart.getBufferPool().requestBufferBuilderBlocking(subpartitionInfo.getSubPartitionIdx());
> pass to resPart.getSubpartition(idx).add(BufferConsumer, boolean,
> boolean)
> {code}
> Depends on FLINK-18989
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