- **status**: unassigned --> assigned


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** [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 04:56 AM UTC
**Owner:** nobody


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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