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98 Cray T3E User’s Guide
9.4.2 The appview command
In addition to MPP Apprentice, the appview command that a quick sum-
mary of the profiling data. Its output is similar to the output from the
conventional Unix profiler prof.Theappview command was developed
at CSC and it relies on a few scripts that extract and sort information
from the textual report produced by the command apprentice -r.
The following example illustrates the usage. The command line is
appview app.rif | more
The default RIF file name is app.rif and can be omitted from the com-
mand line. The output looks like this:
###
# # ##### ##### # # # ###### # #
####### # ## ##
# # # # # # # # # ##### # #
####### ##### ##### # # # # # ## #
# # # # # # # # ## ##
# # # # # # ###### # #
Fri Feb 21 13:32:07 EET 1997
Total time 24.273 seconds.
No. of routines 8
Routine Exclusive (%) Inclusive in_Called Parallel
======= ========= === ========= ========= ========
COLL2 14.968 ( 61.67) 14.968 0.000 14.946
_HSIN 8.216 ( 33.85) <not instrumented>
INIT 1.062 ( 4.38) 9.277 8.216 1.062
_FWF 0.022 ( 0.09) <not instrumented>
f$init 0.005 ( 0.02) <not instrumented>
COLL2_TEST 0.000 ( 0.00) 24.250 24.250 0.000
BARRIER 0.000 ( 0.00) <not instrumented>
$END 0.000 ( 0.00) <not instrumented>
The columns Exclusive and Inclusive show the execution time with-
out and with the time spent in called subprograms, respectively. The
column in_Called show the time for called subprograms.
9.4.3 PAT
The Performance Analysis Tool (PAT) provides a low-overhead method
for profiling programs and obtaining timing and performance counter
information. PAT can also be used for determining load balance across
processing elements, generating and viewing trace files, performing
event traces, etc. These advanced features are not available in the MPP
Apprentice. On the other hand, PAT lacks the graphical interface of the
Apprentice. PAT is used in evaluating the performance and scaling new
T3E projects at CSC.
PAT periodically samples the program counter to generate an execution-
time profile and uses the processor performance counters to gather
- Cray T3E 1
- User’s Guide 1
- Cray T3E User’s Guide 3 3
- Contents 4
- Contents 5 5
- B Glossary 113 6
- Bibliography 118 6
- Index 120 6
- Introduction 7
- 1.2 Usage policy 8
- 1.3 Overview of the system 9
- 1.4 Programming environment 9
- 10 Cray T3E User’s Guide 10
- Chapter 1. Introduction 11 11
- 12 Cray T3E User’s Guide 12
- Using the Cray T3E at CSC 13
- 2.2 Files 14
- 2.3 Editing files 16
- 2.5 Executing in batch mode 17
- 2.6 More information 18
- The Cray T3E system 20
- 3.2 Distributed memory 21
- 3.3 Processing elements 21
- 3.4 Processor architecture 23
- 3.5 Local memory hierarchy 24
- 26 Cray T3E User’s Guide 26
- Processing Element 27
- I/O Controller 27
- Interconnection 27
- Network 27
- 3.9 File systems 28
- 3.10 Resource monitoring 29
- 30 Cray T3E User’s Guide 30
- 3.11 More information 31
- Program development 32
- 4.3.1 BLAS 34
- 4.3.2 LAPACK 34
- 4.3.3 BLACS 35
- 4.3.4 PBLAS and ScaLAPACK 35
- 4.3.5 Details 35
- 36 Cray T3E User’s Guide 36
- 4.6 More information 38
- Fortran programming 40
- 5.2 Basic usage 41
- 5.4 Compiler options 42
- 5.5 Optimization options 42
- 5.6 Optimizing for cache 44
- 5.7 Compiler directives 45
- 5.8 Fortran 90 modules 48
- 5.9 Source code preprocessing 49
- 5.10 More information 51
- C and C++ programming 52
- 6.2 The C compiler 53
- 6.3 Calling Fortran from C 54
- 6.4 C compiler options 55
- #pragma _CRI symmetric var 59
- #pragma _CRI unroll [n] 59
- 6.6 The C++ compiler 61
- 6.7 More information 61
- Interprocess communication 62
- 7.2.1 Format of the MPI calls 63
- 7.2.2 Some MPI routines 64
- 7.2.3 An example of using MPI 64
- 7.2.5 MPI data types 67
- 7.3.1 Using PVM on the T3E 68
- #include <mpp/shmem.h> 71
- INCLUDE ’mpp/shmem.fh’ 71
- 7.4.2 Data addresses 72
- 7.4.4 Reduction routines 74
- 7.4.6 Example of using SHMEM 76
- 78 Cray T3E User’s Guide 78
- 0:c= 10121416 78
- 1:c= 2468 78
- 80 Cray T3E User’s Guide 80
- Batch queuing system 81
- 82 Cray T3E User’s Guide 82
- # QSUB -l p_mpp_t=7000 82
- 8.3 Status of the NQE job 83
- 84 Cray T3E User’s Guide 84
- 8.4 Deleting an NQE batch job 86
- 8.5 Queues 86
- 8.6 More information 87
- Programming tools 88
- 9.2 Program Browser 89
- 9.3 Debugging programs 92
- 9.3.2 Examining core files 93
- 94 Cray T3E User’s Guide 94
- 9.4.1 MPP Apprentice 95
- 9.4.2 The appview command 98
- 9.4.3 PAT 98
- 9.5.1 The VAMPIRtrace library 100
- 102
- 9.5.3 More information 103
- Miscellaneous notes 104
- 10.1.3 The CPU clock timer 105
- 10.1.4 Example of timing 106
- 108 Cray T3E User’s Guide 108
- 10.4 More information 110
- About CSC 111
- 112 Cray T3E User’s Guide 112
- Glossary 113
- 114 Cray T3E User’s Guide 114
- Appendix B. Glossary 115 115
- Metacomputer Environment 116
- Bibliography 118
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