Commit 8e8a81e
authored
[GLUTEN-10933][VL] feat: Support cached the batches in cpu cache (#11758)
Cache the batch in cpu cache, and wait for the join threads to fetch one by one, the build threads will start to fetch as soon as possible, but the probe thread need to wait for build finished.
The buffer size is controlled by `spark.gluten.sql.columnar.backend.velox.cudf.shuffleMaxPrefetchBytes` temporally, the size may be changed by the remaining memory in the server.
Test:
Test in local SF100, adjust the config to enable caching batch.
```
--conf spark.gluten.sql.columnar.backend.velox.cudf.batchSize=10000 \
--conf spark.gluten.sql.columnar.backend.velox.cudf.shuffleMaxPrefetchBytes=1024MB
```
The log prints `Prefetched 171 batches (24057900 bytes) before blocking on GPU lock`
Next step:
Prefetch the probe side batch when build starts.
Related issue: #109331 parent e0b6081 commit 8e8a81e
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lines changed- backends-velox/src/main
- java/org/apache/gluten/utils
- scala/org/apache/gluten
- config
- execution
- extension
- cpp/velox
- config
- cudf
- jni
- memory
- tests
- utils
- docs
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