OMP2012 Flag Description
Cray Cray XC30 (Intel Xeon E5-2697 v2)

Test sponsored by Indiana University

Base Compiler Invocation

C benchmarks

C++ benchmarks

Fortran benchmarks

Base Portability Flags




Shell, Environment, and Other Software Settings

Cray-specific, nonstandard variable used to change the size of the thread stack from the default size of 16 MB to the specified size. The number in unit of Byte.
For loops running with OpenMP schedule "static", this results in (#iterations/#threads) iterations--rounded to the next lower integer--being allocated to most threads, with at most one additional iteration being allocated to some threads. Although the largest number of iterations assigned to any thread remains the same, this results in a more even sharing of iterations between threads, which may sometimes lead to a performance improvement relative to the default static thread distribution.
OMP_DYNAMIC=[ 1 | 0 ] Enables (1) or disables (0) the dynamic adjustment of the number of threads.
Enables (TRUE) or disables (FALSE) nested parallelism.
Selects the OpenMP run-time library.
Set stack size to unlimited
The command "ulimit -s unlimited" is used to set the stack size limit to unlimited.

Flag description origin markings:

[user] Indicates that the flag description came from the user flags file.
[suite] Indicates that the flag description came from the suite-wide flags file.
[benchmark] Indicates that the flag description came from a per-benchmark flags file.

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Copyright 2012-2017 Standard Performance Evaluation Corporation
Tested with SPEC OMP2012 v1.1.
Report generated on Wed Aug 16 15:43:22 2017 by SPEC OMP2012 flags formatter v538.