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    • fisaila's avatar
      Added epochs to Darshan. Epoches and full statistics are mutually exclusive. · 76a9b5b6
      fisaila authored 
      Functionality:
An epoch is enclosed by:
darshan_start_epoch();
darshan_stop_epoch();

There is one log file per epoch and the epoch number appears in the file name. 
If epoches are not used the functionality should be the same as before. 

Implementation: 
I tried to minimally modify the code (only darshan-mpi-io.c was modified). 
1) darshan_shutdown became: 
void darshan_shutdown_epoch(int timing_flag)

5 lines were commented and moved to the new darshan_shutdown

2) void darshan_shutdown(int timing_flag)

If no epoch is used just calls darshan_shutdown_epoch
else 
for each epoch restore the counters from the end of epoch and call darshan_shutdown_epoch

3) void darshan_start_epoch(void)

just resets the counters from darshan_global_job

4) void darshan_end_epoch(void)

saves the counters from darshan_global_job 


 
Test:
One test has been added in darshan-test/epoch-testing/. 
I have not performed yet extensive testing. 




git-svn-id: https://svn.mcs.anl.gov/repos/darshan/branches/darshan-florin-extensions@818 3b7491f3-a168-0410-bf4b-c445ed680a29
      76a9b5b6
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