yikf commented on code in PR #13368:
URL: https://github.com/apache/gluten/pull/13368#discussion_r4313998394
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cpp/velox/compute/VeloxBackend.cc:
##########
@@ -255,9 +255,16 @@ void VeloxBackend::init(
std::make_unique<folly::CPUThreadPoolExecutor>(ioThreads,
folly::CPUThreadPoolExecutor::makeLifoSemQueue());
}
- const auto broadcastHashTableBuildThreads =
- std::max<int32_t>(1,
backendConf_->get<int32_t>(kBroadcastHashTableBuildThreads,
numTaskSlotsPerExecutor));
- broadcastHashTableBuildExecutor_ =
std::make_unique<folly::CPUThreadPoolExecutor>(broadcastHashTableBuildThreads);
+ const int32_t broadcastHashTableBuildThreads = [&]() {
+ if (!backendConf_->valueExists(kBroadcastHashTableBuildThreads)) {
+ LOG(WARNING) << kBroadcastHashTableBuildThreads << " is not set. Falling
back to " << kNumTaskSlotsPerExecutor
+ << " (" << numTaskSlotsPerExecutor << ").";
+ return numTaskSlotsPerExecutor;
+ }
+ return backendConf_->get<int32_t>(kBroadcastHashTableBuildThreads).value();
+ }();
Review Comment:
In theory, the JVM side will always set it.
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