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SyncPoint to allow a callback with an argument and use it to get DBTest.DynamicLevelCompressionPerLevel2 more straight-forward

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Summary:
Allow users to give a callback function with parameter using sync point, so more complicated verification can be done in tests.
Use it in DBTest.DynamicLevelCompressionPerLevel2 so that failures will be more easy to debug.

Test Plan: Run all tests. Run DBTest.DynamicLevelCompressionPerLevel2 with valgrind check.

Reviewers: rven, yhchiang, anthony, kradhakrishnan, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D36999
main
sdong 10 years ago
parent 281db8bb62
commit fcb206b667
6 changed files with 56 additions and 64 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 3
      db/compaction_picker.cc
  2. 76
      db/db_test.cc
  3. 6
      table/mock_table.cc
  4. 13
      table/mock_table.h
  5. 7
      util/sync_point.cc
  6. 11
      util/sync_point.h

3
db/compaction_picker.cc
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@ -20,6 +20,7 @@
#include "util/log_buffer.h"
#include "util/statistics.h"
#include "util/string_util.h"
#include "util/sync_point.h"
namespace rocksdb {
@ -768,6 +769,8 @@ Compaction* LevelCompactionPicker::PickCompaction(
dummy_compaction_options_fifo);
}
TEST_SYNC_POINT_CALLBACK("LevelCompactionPicker::PickCompaction:Return", c);
return c;
}

76
db/db_test.cc
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@ -4220,7 +4220,7 @@ TEST_P(DBTestUniversalCompactionParallel, UniversalCompactionParallel) {
std::atomic<int> num_compactions_running(0);
std::atomic<bool> has_parallel(false);
rocksdb::SyncPoint::GetInstance()->SetCallBack("CompactionJob::Run():Start",
[&]() {
[&](void* arg) {
if (num_compactions_running.fetch_add(1) > 0) {
has_parallel.store(true);
return;
@ -4235,7 +4235,7 @@ TEST_P(DBTestUniversalCompactionParallel, UniversalCompactionParallel) {
});
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"CompactionJob::Run():End",
[&]() { num_compactions_running.fetch_add(-1); });
[&](void* arg) { num_compactions_running.fetch_add(-1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
options = CurrentOptions(options);
@ -10379,7 +10379,7 @@ TEST_F(DBTest, DynamicMemtableOptions) {
std::atomic<int> sleep_count(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DelayWrite:TimedWait",
[&]() { sleep_count.fetch_add(1); });
[&](void* arg) { sleep_count.fetch_add(1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
while (Put(Key(count), RandomString(&rnd, 1024), wo).ok() && count < 256) {
@ -11018,7 +11018,7 @@ TEST_F(DBTest, DynamicLevelMaxBytesBase2) {
// Hold compaction jobs to make sure
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"CompactionJob::Run():Start",
[&]() { env_->SleepForMicroseconds(100000); });
[&](void* arg) { env_->SleepForMicroseconds(100000); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
ASSERT_OK(dbfull()->SetOptions({
{"disable_auto_compactions", "true"},
@ -11242,45 +11242,40 @@ TEST_F(DBTest, DynamicLevelCompressionPerLevel2) {
DestroyAndReopen(options);
// When base level is L4, L4 is LZ4.
std::atomic<bool> seen_lz4(false);
std::function<void(const CompressionType&, uint64_t)> cb1 =
[&](const CompressionType& ct, uint64_t size) {
ASSERT_TRUE(size <= 30 || ct == kLZ4Compression);
if (ct == kLZ4Compression) {
seen_lz4.store(true);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
if (compaction->output_level() == 4) {
ASSERT_TRUE(compaction->OutputCompressionType() == kLZ4Compression);
}
};
mock::MockTableBuilder::finish_cb_ = &cb1;
});
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
for (int i = 0; i < 100; i++) {
ASSERT_OK(Put(Key(keys[i]), RandomString(&rnd, 200)));
}
Flush();
dbfull()->TEST_WaitForCompact();
ASSERT_TRUE(seen_lz4.load());
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 0);
ASSERT_EQ(NumTableFilesAtLevel(3), 0);
ASSERT_GT(NumTableFilesAtLevel(4), 0);
int prev_num_files_l4 = NumTableFilesAtLevel(4);
// After base level turn L4->L3, L3 becomes LZ4 and L4 becomes Zlib
std::atomic<bool> seen_zlib(false);
std::function<void(const CompressionType&, uint64_t)> cb2 =
[&](const CompressionType& ct, uint64_t size) {
ASSERT_TRUE(size <= 30 || ct != kNoCompression);
if (ct == kZlibCompression) {
if (!seen_zlib.load()) {
seen_lz4.store(false);
}
seen_zlib.store(true);
}
// Make sure after making L4 the base level, L4 is LZ4.
if (seen_zlib.load()) {
if (ct == kLZ4Compression && size < 80) {
seen_lz4.store(true);
}
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"LevelCompactionPicker::PickCompaction:Return", [&](void* arg) {
Compaction* compaction = reinterpret_cast<Compaction*>(arg);
if (compaction->output_level() == 4 && compaction->start_level() == 3) {
ASSERT_TRUE(compaction->OutputCompressionType() == kZlibCompression);
} else {
ASSERT_TRUE(compaction->OutputCompressionType() == kLZ4Compression);
}
};
mock::MockTableBuilder::finish_cb_ = &cb2;
});
for (int i = 101; i < 500; i++) {
ASSERT_OK(Put(Key(keys[i]), RandomString(&rnd, 200)));
if (i % 100 == 99) {
@ -11288,11 +11283,13 @@ TEST_F(DBTest, DynamicLevelCompressionPerLevel2) {
dbfull()->TEST_WaitForCompact();
}
}
ASSERT_TRUE(seen_lz4.load());
ASSERT_TRUE(seen_zlib.load());
rocksdb::SyncPoint::GetInstance()->ClearAllCallBacks();
rocksdb::SyncPoint::GetInstance()->DisableProcessing();
ASSERT_EQ(NumTableFilesAtLevel(1), 0);
ASSERT_EQ(NumTableFilesAtLevel(2), 0);
mock::MockTableBuilder::finish_cb_ = nullptr;
ASSERT_GT(NumTableFilesAtLevel(3), 0);
ASSERT_GT(NumTableFilesAtLevel(4), prev_num_files_l4);
}
TEST_F(DBTest, DynamicCompactionOptions) {
@ -11541,8 +11538,7 @@ TEST_F(DBTest, DynamicCompactionOptions) {
std::atomic<int> sleep_count(0);
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::DelayWrite:Sleep",
[&]() { sleep_count.fetch_add(1); });
"DBImpl::DelayWrite:Sleep", [&](void* arg) { sleep_count.fetch_add(1); });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
// Hard rate limit slow down for 1000 us, so default 10ms should be ok
@ -12371,14 +12367,16 @@ TEST_F(DBTest, CompressLevelCompaction) {
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"Compaction::InputCompressionMatchesOutput:Matches",
[&]() { matches++; });
[&](void* arg) { matches++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"Compaction::InputCompressionMatchesOutput:DidntMatch",
[&]() { didnt_match++; });
[&](void* arg) { didnt_match++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:NonTrivial", [&]() { non_trivial++; });
"DBImpl::BackgroundCompaction:NonTrivial",
[&](void* arg) { non_trivial++; });
rocksdb::SyncPoint::GetInstance()->SetCallBack(
"DBImpl::BackgroundCompaction:TrivialMove", [&]() { trivial_move++; });
"DBImpl::BackgroundCompaction:TrivialMove",
[&](void* arg) { trivial_move++; });
rocksdb::SyncPoint::GetInstance()->EnableProcessing();
Reopen(options);

6
table/mock_table.cc
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@ -61,16 +61,12 @@ Status MockTableFactory::NewTableReader(
return Status::OK();
}
std::function<void(const CompressionType&, uint64_t)>*
MockTableBuilder::finish_cb_ = nullptr;
TableBuilder* MockTableFactory::NewTableBuilder(
const TableBuilderOptions& table_builder_options,
WritableFile* file) const {
uint32_t id = GetAndWriteNextID(file);
return new MockTableBuilder(id, &file_system_,
table_builder_options.compression_type);
return new MockTableBuilder(id, &file_system_);
}
Status MockTableFactory::CreateMockTable(Env* env, const std::string& fname,

13
table/mock_table.h
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@ -97,11 +97,8 @@ class MockTableIterator : public Iterator {
class MockTableBuilder : public TableBuilder {
public:
MockTableBuilder(uint32_t id, MockTableFileSystem* file_system,
CompressionType compression_type)
: id_(id),
file_system_(file_system),
compression_type_(compression_type) {}
MockTableBuilder(uint32_t id, MockTableFileSystem* file_system)
: id_(id), file_system_(file_system) {}
// REQUIRES: Either Finish() or Abandon() has been called.
~MockTableBuilder() {}
@ -117,9 +114,6 @@ class MockTableBuilder : public TableBuilder {
Status status() const override { return Status::OK(); }
Status Finish() override {
if (finish_cb_ != nullptr) {
(*finish_cb_)(compression_type_, FileSize());
}
MutexLock lock_guard(&file_system_->mutex);
file_system_->files.insert({id_, table_});
return Status::OK();
@ -131,13 +125,10 @@ class MockTableBuilder : public TableBuilder {
uint64_t FileSize() const override { return table_.size(); }
static std::function<void(const CompressionType&, uint64_t)>* finish_cb_;
private:
uint32_t id_;
MockTableFileSystem* file_system_;
MockFileContents table_;
CompressionType compression_type_;
};
class MockTableFactory : public TableFactory {

7
util/sync_point.cc
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@ -35,7 +35,7 @@ bool SyncPoint::PredecessorsAllCleared(const std::string& point) {
}
void SyncPoint::SetCallBack(const std::string point,
std::function<void()> callback) {
std::function<void(void*)> callback) {
std::unique_lock<std::mutex> lock(mutex_);
callbacks_[point] = callback;
}
@ -63,7 +63,7 @@ void SyncPoint::ClearTrace() {
cleared_points_.clear();
}
void SyncPoint::Process(const std::string& point) {
void SyncPoint::Process(const std::string& point, void* cb_arg) {
std::unique_lock<std::mutex> lock(mutex_);
if (!enabled_) return;
@ -72,7 +72,7 @@ void SyncPoint::Process(const std::string& point) {
if (callback_pair != callbacks_.end()) {
num_callbacks_running_++;
mutex_.unlock();
callback_pair->second();
callback_pair->second(cb_arg);
mutex_.lock();
num_callbacks_running_--;
cv_.notify_all();
@ -85,6 +85,5 @@ void SyncPoint::Process(const std::string& point) {
cleared_points_.insert(point);
cv_.notify_all();
}
} // namespace rocksdb
#endif // NDEBUG

11
util/sync_point.h
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@ -13,6 +13,7 @@
#ifdef NDEBUG
#define TEST_SYNC_POINT(x)
#define TEST_SYNC_POINT_CALLBACK(x, y)
#else
namespace rocksdb {
@ -39,7 +40,8 @@ class SyncPoint {
void LoadDependency(const std::vector<Dependency>& dependencies);
// Set up a call back function in sync point.
void SetCallBack(const std::string point, std::function<void()> callback);
void SetCallBack(const std::string point,
std::function<void(void*)> callback);
// Clear all call back functions.
void ClearAllCallBacks();
@ -54,7 +56,8 @@ class SyncPoint {
// triggered by TEST_SYNC_POINT, blocking execution until all predecessors
// are executed.
void Process(const std::string& point);
// And/or call registered callback functionn, with argument `cb_arg`
void Process(const std::string& point, void* cb_arg = nullptr);
// TODO: it might be useful to provide a function that blocks until all
// sync points are cleared.
@ -65,7 +68,7 @@ class SyncPoint {
// successor/predecessor map loaded from LoadDependency
std::unordered_map<std::string, std::vector<std::string>> successors_;
std::unordered_map<std::string, std::vector<std::string>> predecessors_;
std::unordered_map<std::string, std::function<void()> > callbacks_;
std::unordered_map<std::string, std::function<void(void*)> > callbacks_;
std::mutex mutex_;
std::condition_variable cv_;
@ -84,4 +87,6 @@ class SyncPoint {
// See TransactionLogIteratorRace in db_test.cc for an example use case.
// TEST_SYNC_POINT is no op in release build.
#define TEST_SYNC_POINT(x) rocksdb::SyncPoint::GetInstance()->Process(x)
#define TEST_SYNC_POINT_CALLBACK(x, y) \
rocksdb::SyncPoint::GetInstance()->Process(x, y)
#endif // NDEBUG

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