[hpct] Summary of the issues: Sept 4, 2008

[Vitali A. Morozov]

Sept 4, 2008: HPCT: Summary of the issues

1) We want to be able to reduce statistics, generated in mpi_profile.* 
files, by some sort of MPI_Start_Statistics()/MPI_Stop_Statistics() 
function calls. As we know from I-hsin, 
MPI_trace_start()/MPI_trace_stop() calls control tracing part only.

2) According to I-hsin, "mpi_profile.<rank number> are generated per 
each MPI rank." We do not see this behavior: 4 files are generated 
instead with minimal, maximal, mean communication time, and collective 
over all tasks statistics file called mpi_profile.0. Please clarify 1) 
what is printed at the end of the run, 2) how to print statistics from a 
particular MPI task. Examples of the test run would be very useful to have.

3) What is IHPCT_BASE env. variable? When I should use it?

4) peekperf does not show sources for Fortran program.

5) Fortran instrumented program generates "Error getting the executable 
name, line number information will not be available" message.

6) peekview single_trace gives the node 0, 8, and 15. Example program 
was sent to the list already and contains 2 Sends and 2 Recvs. Where are 
the other communications? See attached screenshot.

7) peekview on selective instrumentation does not show correct number of 
calls. From 1 Send and 1 Recv, we see nothing on peekview screen.

8) HPM part does not work: core file at runtime. Please, give us example 
of 1) how to compile HPM-instrumented program, 2) what is the result of 
the run.

9) Xprofiler has 6 open issues:

   1. Load Files, Filter -> Uncluster functions, File -> Screen Dump ->
      Select Target Window,
         1. clicking now on the main window may occasionally cause crach
         2. resulting file Xprofiler_screenDump.ps.0 is a balack-box
            Postscript
   2. The meaning on exterior scroll bars in not clear, they never scroll.
   3. *Removing Histogram functionality is unacceptable* A more
      complicated multistep example
         1. Load Files
         2. Report -> Flat Profile
         3. Code Display -> Show Source Code
         4. File -> Save as; File -> Close
         5. Code Display -> Show Histogram w/Source Code
         6. crash
   4. Load Files, Report -> Flat Profile, Code Display -> Show Source
      Code, File -> Save as
         1. Close the window by clicking X (not File -> Close)
         2. Select another function in Flat Profile
         3. Code Display -> Show Source Code; File -> Save as; crush
   5. Load Files, Report -> Flat profile, Show Source Code, search
      anything non-existent, press enter, crash
   6. Load Files, Report -> Flat Profile, try to search anything like
      'asfsafd', once not found press Enter, crash


Vitali

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