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From "Tsuyoshi Ozawa (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TEZ-2605) [Umbrella] CPU optimizations for hotspots
Date Wed, 08 Jul 2015 15:39:04 GMT

     [ https://issues.apache.org/jira/browse/TEZ-2605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsuyoshi Ozawa updated TEZ-2605:
--------------------------------
    Description: 
There are some CPU hotpots when processing large data when IO is highly optimized:

1. Sort : memory access to compare with 2 values can be bottleneck.
2. Aggregation : hash construction for UnorderedPartitionedKVWriter can be bottleneck.
3. Filter : memory access to compare the key values with given condition.

This issue is a umbrella jira for CPU optmizations at Tez side.

Related works:
Alphasort: http://dl.acm.org/citation.cfm?id=615237
Multi-Core, Main-Memory Joins: Sort vs. Hash Revisited: https://cs.uwaterloo.ca/~tozsu/publications/other/p168-balkesen.pdf



  was:
There are some CPU hotpots when processing large data when IO is highly optimized:

1. Sort : memory access to compare with 2 values can be bottleneck.
2. Aggregation : hash construction for UnorderedPartitionedKVWriter can be bottleneck.
3. Filter : memory access to compare the key values with given condition.

This issue is a umbrella jira for CPU optmizations at Tez side.

Related works:
Alphasort: http://dl.acm.org/citation.cfm?id=615237




> [Umbrella] CPU optimizations for hotspots
> -----------------------------------------
>
>                 Key: TEZ-2605
>                 URL: https://issues.apache.org/jira/browse/TEZ-2605
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: Tsuyoshi Ozawa
>
> There are some CPU hotpots when processing large data when IO is highly optimized:
> 1. Sort : memory access to compare with 2 values can be bottleneck.
> 2. Aggregation : hash construction for UnorderedPartitionedKVWriter can be bottleneck.
> 3. Filter : memory access to compare the key values with given condition.
> This issue is a umbrella jira for CPU optmizations at Tez side.
> Related works:
> Alphasort: http://dl.acm.org/citation.cfm?id=615237
> Multi-Core, Main-Memory Joins: Sort vs. Hash Revisited: https://cs.uwaterloo.ca/~tozsu/publications/other/p168-balkesen.pdf



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