morningman commented on code in PR #30746:
URL: https://github.com/apache/doris/pull/30746#discussion_r1477173233
##########
be/src/vec/exec/scan/scanner_context.cpp:
##########
@@ -210,148 +136,238 @@ Status ScannerContext::init() {
thread_token ==
nullptr ? "False" : "True");
}
+ // submit `_max_thread_num` running scanners to `ScannerScheduler`
+ // When a running scanners is finished, it will submit one of the
remaining scanners.
+ for (int i = 0; i < _max_thread_num; ++i) {
+ std::weak_ptr<ScannerDelegate> next_scanner;
+ if (_scanners.try_dequeue(next_scanner)) {
+ vectorized::BlockUPtr block = get_free_block(_batch_size);
+ submit_running_scanner(
+ std::make_shared<RunningScanner>(next_scanner,
std::move(block)));
+ _num_running_scanners++;
+ }
+ }
+
return Status::OK();
}
std::string ScannerContext::parent_name() {
return _parent ? _parent->get_name() : _local_state->get_name();
}
-vectorized::BlockUPtr ScannerContext::get_free_block() {
+vectorized::BlockUPtr ScannerContext::get_free_block(int batch_size) {
Review Comment:
`batch_size` is not used?
##########
be/src/vec/exec/scan/scanner_context.cpp:
##########
@@ -210,148 +136,238 @@ Status ScannerContext::init() {
thread_token ==
nullptr ? "False" : "True");
}
+ // submit `_max_thread_num` running scanners to `ScannerScheduler`
+ // When a running scanners is finished, it will submit one of the
remaining scanners.
+ for (int i = 0; i < _max_thread_num; ++i) {
+ std::weak_ptr<ScannerDelegate> next_scanner;
+ if (_scanners.try_dequeue(next_scanner)) {
+ vectorized::BlockUPtr block = get_free_block(_batch_size);
+ submit_running_scanner(
+ std::make_shared<RunningScanner>(next_scanner,
std::move(block)));
+ _num_running_scanners++;
+ }
+ }
+
return Status::OK();
}
std::string ScannerContext::parent_name() {
return _parent ? _parent->get_name() : _local_state->get_name();
}
-vectorized::BlockUPtr ScannerContext::get_free_block() {
+vectorized::BlockUPtr ScannerContext::get_free_block(int batch_size) {
vectorized::BlockUPtr block;
if (_free_blocks.try_dequeue(block)) {
+ std::lock_guard<std::mutex> fl(_free_blocks_lock);
Review Comment:
Why need `_free_blocks_lock`?
##########
be/src/vec/exec/scan/scanner_context.cpp:
##########
@@ -210,148 +136,238 @@ Status ScannerContext::init() {
thread_token ==
nullptr ? "False" : "True");
}
+ // submit `_max_thread_num` running scanners to `ScannerScheduler`
+ // When a running scanners is finished, it will submit one of the
remaining scanners.
+ for (int i = 0; i < _max_thread_num; ++i) {
+ std::weak_ptr<ScannerDelegate> next_scanner;
+ if (_scanners.try_dequeue(next_scanner)) {
+ vectorized::BlockUPtr block = get_free_block(_batch_size);
+ submit_running_scanner(
+ std::make_shared<RunningScanner>(next_scanner,
std::move(block)));
+ _num_running_scanners++;
+ }
+ }
+
return Status::OK();
}
std::string ScannerContext::parent_name() {
return _parent ? _parent->get_name() : _local_state->get_name();
}
-vectorized::BlockUPtr ScannerContext::get_free_block() {
+vectorized::BlockUPtr ScannerContext::get_free_block(int batch_size) {
vectorized::BlockUPtr block;
if (_free_blocks.try_dequeue(block)) {
+ std::lock_guard<std::mutex> fl(_free_blocks_lock);
DCHECK(block->mem_reuse());
- _free_blocks_memory_usage->add(-block->allocated_bytes());
- _serving_blocks_num++;
+ _free_blocks_memory_usage -= block->allocated_bytes();
+ _free_blocks_memory_usage_mark->set(_free_blocks_memory_usage);
return block;
}
- block = vectorized::Block::create_unique(_output_tuple_desc->slots(),
_batch_size,
- true /*ignore invalid slots*/);
-
- COUNTER_UPDATE(_newly_create_free_blocks_num, 1);
-
- _serving_blocks_num++;
- return block;
+ return vectorized::Block::create_unique(_output_tuple_desc->slots(),
batch_size,
+ true /*ignore invalid slots*/);
}
-void ScannerContext::return_free_block(std::unique_ptr<vectorized::Block>
block) {
- _serving_blocks_num--;
- if (block->mem_reuse()) {
- // Only put blocks with schema to free blocks, because colocate blocks
- // need schema.
- _estimated_block_bytes = std::max(block->allocated_bytes(),
(size_t)16);
+void ScannerContext::return_free_block(vectorized::BlockUPtr block) {
+ std::lock_guard<std::mutex> fl(_free_blocks_lock);
+ if (block->mem_reuse() && _free_blocks_memory_usage < _max_bytes_in_queue)
{
block->clear_column_data();
- _free_blocks_memory_usage->add(block->allocated_bytes());
+ _free_blocks_memory_usage += block->allocated_bytes();
+ _free_blocks_memory_usage_mark->set(_free_blocks_memory_usage);
_free_blocks.enqueue(std::move(block));
}
}
-void
ScannerContext::append_blocks_to_queue(std::vector<vectorized::BlockUPtr>&
blocks) {
- std::lock_guard l(_transfer_lock);
- auto old_bytes_in_queue = _cur_bytes_in_queue;
- for (auto& b : blocks) {
- auto st = validate_block_schema(b.get());
- if (!st.ok()) {
- set_status_on_error(st, false);
+bool ScannerContext::empty_in_queue(int id) {
+ std::lock_guard<std::mutex> l(_transfer_lock);
+ return _blocks_queue.empty();
+}
+
+void ScannerContext::submit_running_scanner(std::shared_ptr<RunningScanner>
running_scanner) {
+ _num_scheduled_scanners++;
+ _scanner_scheduler->submit(shared_from_this(), running_scanner);
+}
+
+void ScannerContext::append_block_to_queue(std::shared_ptr<RunningScanner>
running_scanner) {
+ Status st = validate_block_schema(running_scanner->current_block.get());
+ if (!st.ok()) {
+ running_scanner->status = st;
+ }
+ // set `eos` if `END_OF_FILE`, don't take `END_OF_FILE` as error
+ if (running_scanner->status.is<ErrorCode::END_OF_FILE>()) {
+ running_scanner->eos = true;
+ }
+ // We can only the known the block size after reading at least one block
Review Comment:
```suggestion
// We can only know the block size after reading at least one block
```
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