- **assigned_to**: Thanh Nguyen
---
** [tickets:#3144] dtm: time value of a trace record should be generated before
acquiring mutex**
**Status:** assigned
**Milestone:** 5.20.01
**Created:** Thu Jan 16, 2020 04:55 AM UTC by Vu Minh Nguyen
**Last Updated:** Thu Jan 16, 2020 05:13 AM UTC
**Owner:** Thanh Nguyen
There is a mutex in trace agent in order to synchronize trace-writings from
multiple threads and the time value of each trace record is generated after
acquiring the mutex. If there is one taking the mutex, the time value of that
trace record may not reflect the exact timestamp when the trace is actually
triggered.
To be more accurate, the time value should be generated before acquiring the
mutex.
---
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