-qphsinfo

Purpose

Reports the time taken in each compilation phase to standard output.

Syntax


        .-nophsinfo-.   
>>- -q--+-phsinfo---+------------------------------------------><

@PROCESS:

@PROCESS PHSINFO | NOPHSINFO

Defaults

-qnophsinfo

Usage

The output takes the form number1/number2 for each phase where number1 represents the CPU time used by the compiler and number2 represents the total of the compile time and the time that the CPU spends handling system calls.

The time reported by -qphsinfo is in seconds.

Examples

To compile app.f, which consists of 3 compilation units, and report the time taken for each phase of the compilation, enter:

xlf90 app.f  -qphsinfo

The output looks similar to:

FORTRAN phase 1 ftphas1      TIME =  0.000 / 0.000
** m_module   === End of Compilation 1 ===
FORTRAN phase 1 ftphas1      TIME =  0.000 / 0.000
** testassign   === End of Compilation 2 ===
FORTRAN phase 1 ftphas1      TIME =  0.000 / 0.010
** dataassign   === End of Compilation 3 ===
HOT       - Phase Ends;   0.000/  0.000
HOT       - Phase Ends;   0.000/  0.000
HOT       - Phase Ends;   0.000/  0.000
W-TRANS   - Phase Ends;   0.000/  0.010
OPTIMIZ   - Phase Ends;   0.000/  0.000
REGALLO   - Phase Ends;   0.000/  0.000
AS        - Phase Ends;   0.000/  0.000
W-TRANS   - Phase Ends;   0.000/  0.000
OPTIMIZ   - Phase Ends;   0.000/  0.000
REGALLO   - Phase Ends;   0.000/  0.000
AS        - Phase Ends;   0.000/  0.000
W-TRANS   - Phase Ends;   0.000/  0.000
OPTIMIZ   - Phase Ends;   0.000/  0.000
REGALLO   - Phase Ends;   0.000/  0.000
AS        - Phase Ends;   0.000/  0.000
1501-510  Compilation successful for file app.f.

Each phase is invoked three times, corresponding to each compilation unit. FORTRAN represents front-end parsing and semantic analysis, HOT loop transformations, W-TRANS intermediate language translation, OPTIMIZ high–level optimization, REGALLO register allocation and low–level optimization, and AS final assembly.

Compile app.f at the -O4 optimization level with -qphsinfo specified:

xlf90 myprogram.f  -qphsinfo -O4

The following output results:

FORTRAN phase 1 ftphas1      TIME =  0.010 / 0.020
** m_module   === End of Compilation 1 ===
FORTRAN phase 1 ftphas1      TIME =  0.000 / 0.000
** testassign   === End of Compilation 2 ===
FORTRAN phase 1 ftphas1      TIME =  0.000 / 0.000
** dataassign   === End of Compilation 3 ===
HOT       - Phase Ends;   0.000/  0.000
HOT       - Phase Ends;   0.000/  0.000
HOT       - Phase Ends;   0.000/  0.000
IPA       - Phase Ends;   0.080/  0.100
1501-510  Compilation successful for file app.f.
IPA       - Phase Ends;   0.050/  0.070
W-TRANS   - Phase Ends;   0.010/  0.030
OPTIMIZ   - Phase Ends;   0.020/  0.020
REGALLO   - Phase Ends;   0.040/  0.040
AS        - Phase Ends;   0.000/  0.000

Note that during the IPA (interprocedural analysis) optimization phases, the program has resulted in one compilation unit; that is, all procedures have been inlined.

Related information

.The compiler phases