[CHiPPS] Problems about the search log

[化高峰]

Dear Professors,
I have some troubles about the search log generated after the problem is
solved.
First, I would like to know the difference between wallclock and CPU time.

Second, there is these lines in the log file:

Search CPU time (master) = 3.51222 seconds
Max CPU time (worker) = 5.32033
Min CPU time (worker) = 3.50822
Search wallclock time (master) = 6.65905 seconds
Max wallclock (worker) = 6.65418
Min wallclock (worker) = 6.65133

Could you tell me the duration of master`s CPU time and wallclock?
Is  it the duration from the beginning to the end of the tree search?
And why the master`s CPU time is shorter than the Max CPU time of worker?
While the master`s wallclock is longer than the Max wallclock time of
worker?
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