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Reduce queue lengths by running index updates as iteration loop

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A single translation unit can create many index updates, so give
IndexMain_DoCreateIndexUpdate a chance to run a few times. This should also be
faster as it is more icache friendly.
This commit is contained in:
Jacob Dufault 2018-03-20 11:55:40 -07:00 committed by Fangrui Song
parent ef59e59f5b
commit 1fd0a1be94
1 changed files with 64 additions and 57 deletions
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121
src/import_pipeline.cc
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@ -452,67 +452,74 @@ bool IndexMain_DoParse(
bool IndexMain_DoCreateIndexUpdate(TimestampManager* timestamp_manager) { bool IndexMain_DoCreateIndexUpdate(TimestampManager* timestamp_manager) {
auto* queue = QueueManager::instance(); auto* queue = QueueManager::instance();
optional<Index_OnIdMapped> response = queue->on_id_mapped.TryPopFront();
if (!response)
return false;
Timer time; bool did_work = false;
IterationLoop loop;
while (loop.Next()) {
optional<Index_OnIdMapped> response = queue->on_id_mapped.TryPopFront();
if (!response)
return did_work;
IdMap* previous_id_map = nullptr; did_work = true;
IndexFile* previous_index = nullptr;
if (response->previous) { Timer time;
previous_id_map = response->previous->ids.get();
previous_index = response->previous->file.get(); IdMap* previous_id_map = nullptr;
IndexFile* previous_index = nullptr;
if (response->previous) {
previous_id_map = response->previous->ids.get();
previous_index = response->previous->file.get();
}
// Build delta update.
IndexUpdate update =
IndexUpdate::CreateDelta(previous_id_map, response->current->ids.get(),
previous_index, response->current->file.get());
response->perf.index_make_delta = time.ElapsedMicrosecondsAndReset();
LOG_S(INFO) << "Built index update for " << response->current->file->path
<< " (is_delta=" << !!response->previous << ")";
// Write current index to disk if requested.
if (response->write_to_disk) {
LOG_S(INFO) << "Writing cached index to disk for "
<< response->current->file->path;
time.Reset();
response->cache_manager->WriteToCache(*response->current->file);
response->perf.index_save_to_disk = time.ElapsedMicrosecondsAndReset();
timestamp_manager->UpdateCachedModificationTime(
response->current->file->path,
response->current->file->last_modification_time);
}
#if false
#define PRINT_SECTION(name) \
if (response->perf.name) { \
total += response->perf.name; \
output << " " << #name << ": " << FormatMicroseconds(response->perf.name); \
}
std::stringstream output;
long long total = 0;
output << "[perf]";
PRINT_SECTION(index_parse);
PRINT_SECTION(index_build);
PRINT_SECTION(index_save_to_disk);
PRINT_SECTION(index_load_cached);
PRINT_SECTION(querydb_id_map);
PRINT_SECTION(index_make_delta);
output << "\n total: " << FormatMicroseconds(total);
output << " path: " << response->current_index->path;
LOG_S(INFO) << output.rdbuf();
#undef PRINT_SECTION
if (response->is_interactive)
LOG_S(INFO) << "Applying IndexUpdate" << std::endl << update.ToString();
#endif
Index_OnIndexed reply(std::move(update), response->perf);
queue->on_indexed.PushBack(std::move(reply), response->is_interactive);
} }
// Build delta update. return did_work;
IndexUpdate update =
IndexUpdate::CreateDelta(previous_id_map, response->current->ids.get(),
previous_index, response->current->file.get());
response->perf.index_make_delta = time.ElapsedMicrosecondsAndReset();
LOG_S(INFO) << "Built index update for " << response->current->file->path
<< " (is_delta=" << !!response->previous << ")";
// Write current index to disk if requested.
if (response->write_to_disk) {
LOG_S(INFO) << "Writing cached index to disk for "
<< response->current->file->path;
time.Reset();
response->cache_manager->WriteToCache(*response->current->file);
response->perf.index_save_to_disk = time.ElapsedMicrosecondsAndReset();
timestamp_manager->UpdateCachedModificationTime(
response->current->file->path,
response->current->file->last_modification_time);
}
#if false
#define PRINT_SECTION(name) \
if (response->perf.name) { \
total += response->perf.name; \
output << " " << #name << ": " << FormatMicroseconds(response->perf.name); \
}
std::stringstream output;
long long total = 0;
output << "[perf]";
PRINT_SECTION(index_parse);
PRINT_SECTION(index_build);
PRINT_SECTION(index_save_to_disk);
PRINT_SECTION(index_load_cached);
PRINT_SECTION(querydb_id_map);
PRINT_SECTION(index_make_delta);
output << "\n total: " << FormatMicroseconds(total);
output << " path: " << response->current_index->path;
LOG_S(INFO) << output.rdbuf();
#undef PRINT_SECTION
if (response->is_interactive)
LOG_S(INFO) << "Applying IndexUpdate" << std::endl << update.ToString();
#endif
Index_OnIndexed reply(std::move(update), response->perf);
queue->on_indexed.PushBack(std::move(reply), response->is_interactive);
return true;
} }
bool IndexMain_LoadPreviousIndex() { bool IndexMain_LoadPreviousIndex() {