rocksdb/logging
Andrew Kryczka 9bb13c56b3 Use system-wide thread ID in info log lines (#9164)
Summary:
This makes it easier to debug with tools like `ps`. The change only
applies to builds with glibc 2.30+ and _GNU_SOURCE extensions enabled.
We could adopt it in more cases by using the syscall but this is enough
for our build.

Replaces https://github.com/facebook/rocksdb/issues/2973.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9164

Test Plan:
- ran some benchmarks and correlated logged thread IDs with those shown by `ps -L`.
- verified no noticeable regression in throughput for log heavy (more than 700k log lines and over 5k / second) scenario.

Benchmark command:

```
$ TEST_TMPDIR=/dev/shm ./db_bench -benchmarks=filluniquerandom -compression_type=none -max_bytes_for_level_multiplier=2 -write_buffer_size=262144 -num_levels=7 -max_bytes_for_level_base=2097152 -target_file_size_base=524288 -level_compaction_dynamic_level_bytes=true -max_background_jobs=12 -num=20000000
```

Results before: 15.9MB/s, 15.8MB/s, 16.0MB/s
Results after: 16.3MB/s, 16.3MB/s, 15.8MB/s

- Rely on CI to test the fallback behavior

Reviewed By: riversand963

Differential Revision: D32399660

Pulled By: ajkr

fbshipit-source-id: c24d44fdf7782faa616ef0a0964eaca3539d9c24
2021-11-12 19:46:06 -08:00
..
auto_roll_logger.cc
auto_roll_logger.h
auto_roll_logger_test.cc
env_logger.h
env_logger_test.cc
event_logger.cc
event_logger.h
event_logger_test.cc
log_buffer.cc
log_buffer.h
logging.h
posix_logger.h Use system-wide thread ID in info log lines (#9164) 2021-11-12 19:46:06 -08:00