[logging] synced print (#217)
This PR is trying to fix interleaved prints, like:
```
[003-008] 103.3651B / 103.3651B
[002-030] 103.3651B / 103.3651B[001-030] 103.3651B / 103.3651B
[001-022] 103.3651B / 103.3651B
[001-021] 103.3651B / 103.3651B
[003-017] 103.3651B / 103.3651B
[001-015] 103.3651B / 103.3651B[003-015] 103.3651B / 103.3651B[002-015] 103.3651B / 103.3651B
```
