SvPablo

URL http://www-pablo.cs.uiuc.edu/

Version Pablo release 5.0

Languages HPF, ANSI C

Platforms SGI running IRIX 6Sun SPARC running Solaris

SvPablo

• Source view Pablo• GUI for instrumenting source code and viewing

runtime performance data• Joint work at Univ. of Illinois and Rice Univ.• HPF programs automatically instrumented by PGI

HPF compiler• C programs interactively instrumented using GUI• Fortran 77/90 parser developed at JPL

SvPablo Project

• Set of application source files

• One or more performance contexts

• Performance context includes

– instrumentation specification - source code points where performance measurements are to be inserted

– set of performance data files in SDDF, generated when instrumented code is run

• Source files and parser options are shared among all contexts.

SvPablo Main Window

Project Menu

Project Menu Selections

• New Project

• Open Project

• Edit Project

• Select Project Base Directory

• Load Color Configuration

• Exit SvPablo

SvPablo on-line help

New Project dialog box

Edit Project dialog box

Instrumentation of HPF Programs

• Given appropriate flags, the PGI HPF compiler automatically inserts calls to SvPablo instrumentation library routines at the beginning and end of every procedure and for each executable line.

• After compiling and linking with the SvPablo HPF trace library, the user runs the instrumented executable which generates per-process trace files.

• User runs HPFCombine to merge per-process trace files into a single performance file SDDF format.

Overview of HPF Instrumentation

Compiling and Linking

Compile with pghpf flag -Mprof=lines to active calls to the SvPablo HPF trace library:

% pghpf -c -Mprof=lines part1.F % pghpf -c -Mprof=lines part2.F

Link with flag -Mprof=lines to activate calls to both theSvPablo HPF trace library and the PGI profiler library.Link with flag -Mprof=stats to activate only calls to the SvPablo HPF trace library: % pghpf -Mprof=stats part1.o part2.o /usr/local/SvPablo/lib/pghpf2SDDF.o

Procedure Metrics

• Count

• Exclusive Duration

• Inclusive Duration

• Send Msg Duration

• Receive Msg Duration

Line Metrics

• Count

• Duration

• Exclusive Duration

• Message Send Duration

• Message Send Count

• Message Send Size

• Message Receive Duration

• Message Receive Count

• Message Receive Size

Performance Statistics

• Performance file contains the following statistics for the procedure and line performance metrics:

– mean

– standard deviation

– minimum value

– process corresponding to minimum value

– maximum value

– process corresponding to maximum value

Performance view of HPF program

Performance statistics for subroutine relax

Instrumentation of C Programs

• Use GUI to instrument selected constructs in C source files

• Compile instrumented source files and link with SvPablo C Trace Library

• Run instrumented executable

• Combine per-process trace files using CCombine

Overview of C Instrumentation

C Instrumentation GUI

Multiple instrumentable constructs in source line

Instrument options for routine main

Files Created By Saving Instrumentation

• Each instrumented file is saved as <file name>.<inst directory>.inst.c

• The following files are saved in the instrumentation directory:

– InstrumentationInit.c, containing the new main function for the instrumented program

– projectHistory file, containing information for the parser and for CCombine

– a configuration file named <file name>.c.config for each instrumented file, containing the instrumented points used by the GUI

Compiling and Linking

% cc -64 -c file1.Context1.inst.c

% cc -64 -c file2.Context1.inst.c

% cc -64 -c Context1/InstrumentationInit.c

% cc -64 -o app file1.Context1.inst.o file2.Context2.inst.o \

InstrumentationInit.o /usr/local/SvPablo/lib/cTrace.o \

/usr/local/SvPablo/lib/svPabloLib_MPI.o

-L/usr/lib64/libmpi.so -lmpi