1. Added the counters in darshan-log-format.h
2. Added the names of the counters in darshan-util/darshan-logutils.c
3. Added the new profiled function declarations (e.g., PMPI_Sent) in darshan-runtime/darshan-dynamic.h
 - DARSHAN_EXTERN_DECL(...)
4. Added the new profiled function declarations (e.g., PMPI_Sent) in darshan-runtime/lib/darshan-mpi-init-finalize.c 
 - DARSHAN_FORWARD_DECL(...)
 - MAP_OR_FAIL(...)
5. Updated the reducer in darshan-runtime/lib/darshan-mpi-io.c in the function: 
 static void darshan_file_reduce(void* infile_v, 
    void* inoutfile_v, int *len, 
    MPI_Datatype *datatype);




git-svn-id: https://svn.mcs.anl.gov/repos/darshan/branches/darshan-florin-extensions-addcounters@827 3b7491f3-a168-0410-bf4b-c445ed680a29

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