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[FastTokenizer] Fix ft single thread performance #4441

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Merged
merged 1 commit into from
Jan 11, 2023
Merged

[FastTokenizer] Fix ft single thread performance #4441

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27 changes: 17 additions & 10 deletions fast_tokenizer/fast_tokenizer/core/base.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ See the License for the specific language governing permissions and
limitations under the License. */

#include "fast_tokenizer/core/base.h"

#include <thread>

namespace paddlenlp {
Expand All @@ -28,16 +29,22 @@ int GetThreadNum() { return fast_tokenizer_thread_num; }
void RunMultiThread(std::function<void(size_t, size_t)> func,
size_t batch_size) {
int thread_num = GetThreadNum();
std::vector<std::thread> vectorOfThread;
size_t start_index = 0;
size_t step_index = ceil(batch_size / float(thread_num));

for (size_t thread_index = 0; thread_index < thread_num; thread_index++) {
vectorOfThread.emplace_back(std::thread(func, start_index, step_index));
start_index = start_index + step_index;
}
for (size_t thread_index = 0; thread_index < thread_num; thread_index++) {
vectorOfThread[thread_index].join();
if (thread_num == 1) {
// Note(zhoushunjie): No need to create threads when
// thread_num equals to 1.
func(0, batch_size);
} else {
std::vector<std::thread> vectorOfThread;
size_t start_index = 0;
size_t step_index = ceil(batch_size / float(thread_num));

for (size_t thread_index = 0; thread_index < thread_num; thread_index++) {
vectorOfThread.emplace_back(std::thread(func, start_index, step_index));
start_index = start_index + step_index;
}
for (size_t thread_index = 0; thread_index < thread_num; thread_index++) {
vectorOfThread[thread_index].join();
}
}
}

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