CPU2006 Result Flag Description

Base Portability Flags

410.bwaves

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

416.gamess

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

433.milc

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

434.zeusmp

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

435.gromacs

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

436.cactusADM

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- /names:lowercase
- FPORTABILITY
- For mixed-language benchmarks, tell the compiler to convert routine names to lowercase for compatibility
- /assume:underscore
- FPORTABILITY
- For mixed-language benchmarks, tell the compiler to assume that routine names end with an underscore

437.leslie3d

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

444.namd

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- /TP
- CXXPORTABILITY
- Tell the compiler to treat source files as C++ regardless of the file extension

447.dealII

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DDEAL_II_MEMBER_VAR_SPECIALIZATION_BUG
- CXXPORTABILITY
- Defined if the compiler refuses to allow the explicit specialization of static member variables.
- -Qoption,cpp,--ms_incompat_treatment_of_commas_in_macros
- CXXPORTABILITY
- Tell the compiler to work around incompatible treatment of commas in macros, in Visual Studio 2010.

450.soplex

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

453.povray

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DSPEC_CPU_NEED_INVHYP
- CXXPORTABILITY
- Use this to choose the radiosity calculation implementation
- -DNEED_INVHYP
- CXXPORTABILITY
- User uses this to use the inv hyp functions in the source code

454.calculix

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DSPEC_CPU_NOZMODIFIER
- CPORTABILITY
- SPEC_CPU_NOZMODIFIER can be used if your compiler does not implement the C99 standard printf length modifier "z". You'll know you need this flag if validation fails with the file SPECtestformatmodifier_z.txt
- /names:lowercase
- FPORTABILITY
- For mixed-language benchmarks, tell the compiler to convert routine names to lowercase for compatibility

459.GemsFDTD

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

465.tonto

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

470.lbm

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

481.wrf

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DSPEC_CPU_WINDOWS_ICL
- CPORTABILITY
- This macro indicates that the benchmark is being built on a Windows system using the Intel C++ compiler.

482.sphinx3

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

Peak Portability Flags

410.bwaves

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

416.gamess

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

433.milc

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

434.zeusmp

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

435.gromacs

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

436.cactusADM

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- /names:lowercase
- FPORTABILITY
- For mixed-language benchmarks, tell the compiler to convert routine names to lowercase for compatibility
- /assume:underscore
- FPORTABILITY
- For mixed-language benchmarks, tell the compiler to assume that routine names end with an underscore

437.leslie3d

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

444.namd

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- /TP
- CXXPORTABILITY
- Tell the compiler to treat source files as C++ regardless of the file extension

447.dealII

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DDEAL_II_MEMBER_VAR_SPECIALIZATION_BUG
- CXXPORTABILITY
- Defined if the compiler refuses to allow the explicit specialization of static member variables.
- -Qoption,cpp,--ms_incompat_treatment_of_commas_in_macros
- CXXPORTABILITY
- Tell the compiler to work around incompatible treatment of commas in macros, in Visual Studio 2010.

450.soplex

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

453.povray

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DSPEC_CPU_NEED_INVHYP
- CXXPORTABILITY
- Use this to choose the radiosity calculation implementation
- -DNEED_INVHYP
- CXXPORTABILITY
- User uses this to use the inv hyp functions in the source code

454.calculix

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DSPEC_CPU_NOZMODIFIER
- CPORTABILITY
- SPEC_CPU_NOZMODIFIER can be used if your compiler does not implement the C99 standard printf length modifier "z". You'll know you need this flag if validation fails with the file SPECtestformatmodifier_z.txt
- /names:lowercase
- FPORTABILITY
- For mixed-language benchmarks, tell the compiler to convert routine names to lowercase for compatibility

459.GemsFDTD

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

465.tonto

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

470.lbm

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

481.wrf

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.
- -DSPEC_CPU_WINDOWS_ICL
- CPORTABILITY
- This macro indicates that the benchmark is being built on a Windows system using the Intel C++ compiler.

482.sphinx3

- -DSPEC_CPU_P64
- PORTABILITY
- This option is used to indicate that the host system's integers and longs, are 32-bits wide, and pointers are 64-bits wide. Not all benchmarks recognize this macro, but the preferred practice for data model selection applies the flags to all benchmarks; this flag description is a placeholder for those benchmarks that do not recognize this macro.

Base Optimization Flags

C benchmarks

- -QxSSE4.2
- OPTIMIZE
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Qansi-alias
- OPTIMIZE
- Enable/disable(DEFAULT) use of ANSI aliasing rules in optimizations; user asserts that the program adheres to these rules.
- -Qopt-prefetch
- OPTIMIZE
- This option enables or disables prefetch insertion optimization. The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
- -Qauto-ilp32
- COPTIMIZE
- This option instructs the compiler to analyze and transform the program so that 64-bit pointers are shrunk to 32-bit pointers wherever it is legal and safe to do so. In order for this option to be effective the compiler must be able to optimize using the -Qipo option and must be able to analyze all library/external calls the program makes.
  
  This option requires that the size of the program executable never exceed 2^32 bytes and all data values can be represented within 32 bits. If the program can run correctly in a 32-bit system, these requirements are implicitly satisfied. If the program violates these size restrictions, unpredictable behavior might occur.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

C++ benchmarks

- -QxSSE4.2
- OPTIMIZE
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Qansi-alias
- OPTIMIZE
- Enable/disable(DEFAULT) use of ANSI aliasing rules in optimizations; user asserts that the program adheres to these rules.
- -Qopt-prefetch
- OPTIMIZE
- This option enables or disables prefetch insertion optimization. The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
- -Qcxx-features
- CXXOPTIMIZE
- Enable C++ Exception Handling and RTTI
  This option has the same effect as specifying /GX /GR.
- Includes:
  - -GX
  - -GR
- -Qauto-ilp32
- CXXOPTIMIZE
- This option instructs the compiler to analyze and transform the program so that 64-bit pointers are shrunk to 32-bit pointers wherever it is legal and safe to do so. In order for this option to be effective the compiler must be able to optimize using the -Qipo option and must be able to analyze all library/external calls the program makes.
  
  This option requires that the size of the program executable never exceed 2^32 bytes and all data values can be represented within 32 bits. If the program can run correctly in a 32-bit system, these requirements are implicitly satisfied. If the program violates these size restrictions, unpredictable behavior might occur.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- shlW64M.lib
- EXTRA_CXXLIBS
- MicroQuill SmartHeap Library (64-bit) available from http://www.microquill.com/
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

Fortran benchmarks

- -QxSSE4.2
- OPTIMIZE
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Qansi-alias
- OPTIMIZE
- Enable/disable(DEFAULT) use of ANSI aliasing rules in optimizations; user asserts that the program adheres to these rules.
- -Qopt-prefetch
- OPTIMIZE
- This option enables or disables prefetch insertion optimization. The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

Benchmarks using both Fortran and C

- -QxSSE4.2
- OPTIMIZE
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Qansi-alias
- OPTIMIZE
- Enable/disable(DEFAULT) use of ANSI aliasing rules in optimizations; user asserts that the program adheres to these rules.
- -Qopt-prefetch
- OPTIMIZE
- This option enables or disables prefetch insertion optimization. The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
- -Qauto-ilp32
- COPTIMIZE
- This option instructs the compiler to analyze and transform the program so that 64-bit pointers are shrunk to 32-bit pointers wherever it is legal and safe to do so. In order for this option to be effective the compiler must be able to optimize using the -Qipo option and must be able to analyze all library/external calls the program makes.
  
  This option requires that the size of the program executable never exceed 2^32 bytes and all data values can be represented within 32 bits. If the program can run correctly in a 32-bit system, these requirements are implicitly satisfied. If the program violates these size restrictions, unpredictable behavior might occur.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

Peak Optimization Flags

C benchmarks

C++ benchmarks

444.namd

- -QxSSE4.2
- PASS2_CXXFLAGS, PASS2_LDFLAGS
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qprof_gen
- PASS1_CXXFLAGS, PASS1_LDFLAGS
- Instrument program for profiling for the first phase of two-phase profile guided otimization. This instrumentation gathers information about a program's execution paths and data values but does not gather information from hardware performance counters. The profile instrumentation also gathers data for optimizations which are unique to profile-feedback optimization.
- -Qprof_use
- PASS2_CXXFLAGS, PASS2_LDFLAGS
- Instructs the compiler to produce a profile-optimized executable and merges available dynamic information (.dyn) files into a pgopti.dpi file. If you perform multiple executions of the instrumented program, -prof-use merges the dynamic information files again and overwrites the previous pgopti.dpi file.
  Without any other options, the current directory is searched for .dyn files
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Oa
- OPTIMIZE
- Tells the compiler to assume there is no aliasing.
- -Qauto-ilp32
- CXXOPTIMIZE
- This option instructs the compiler to analyze and transform the program so that 64-bit pointers are shrunk to 32-bit pointers wherever it is legal and safe to do so. In order for this option to be effective the compiler must be able to optimize using the -Qipo option and must be able to analyze all library/external calls the program makes.
  
  This option requires that the size of the program executable never exceed 2^32 bytes and all data values can be represented within 32 bits. If the program can run correctly in a 32-bit system, these requirements are implicitly satisfied. If the program violates these size restrictions, unpredictable behavior might occur.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- shlW64M.lib
- EXTRA_CXXLIBS
- MicroQuill SmartHeap Library (64-bit) available from http://www.microquill.com/
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

450.soplex

- -QxSSE4.2
- PASS2_CXXFLAGS, PASS2_LDFLAGS
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qprof_gen
- PASS1_CXXFLAGS, PASS1_LDFLAGS
- Instrument program for profiling for the first phase of two-phase profile guided otimization. This instrumentation gathers information about a program's execution paths and data values but does not gather information from hardware performance counters. The profile instrumentation also gathers data for optimizations which are unique to profile-feedback optimization.
- -Qprof_use
- PASS2_CXXFLAGS, PASS2_LDFLAGS
- Instructs the compiler to produce a profile-optimized executable and merges available dynamic information (.dyn) files into a pgopti.dpi file. If you perform multiple executions of the instrumented program, -prof-use merges the dynamic information files again and overwrites the previous pgopti.dpi file.
  Without any other options, the current directory is searched for .dyn files
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qauto-ilp32
- CXXOPTIMIZE
- This option instructs the compiler to analyze and transform the program so that 64-bit pointers are shrunk to 32-bit pointers wherever it is legal and safe to do so. In order for this option to be effective the compiler must be able to optimize using the -Qipo option and must be able to analyze all library/external calls the program makes.
  
  This option requires that the size of the program executable never exceed 2^32 bytes and all data values can be represented within 32 bits. If the program can run correctly in a 32-bit system, these requirements are implicitly satisfied. If the program violates these size restrictions, unpredictable behavior might occur.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- shlW64M.lib
- EXTRA_CXXLIBS
- MicroQuill SmartHeap Library (64-bit) available from http://www.microquill.com/
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

453.povray

- -QxSSE4.2
- PASS2_CXXFLAGS, PASS2_LDFLAGS
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qprof_gen
- PASS1_CXXFLAGS, PASS1_LDFLAGS
- Instrument program for profiling for the first phase of two-phase profile guided otimization. This instrumentation gathers information about a program's execution paths and data values but does not gather information from hardware performance counters. The profile instrumentation also gathers data for optimizations which are unique to profile-feedback optimization.
- -Qprof_use
- PASS2_CXXFLAGS, PASS2_LDFLAGS
- Instructs the compiler to produce a profile-optimized executable and merges available dynamic information (.dyn) files into a pgopti.dpi file. If you perform multiple executions of the instrumented program, -prof-use merges the dynamic information files again and overwrites the previous pgopti.dpi file.
  Without any other options, the current directory is searched for .dyn files
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Qopt-prefetch
- OPTIMIZE
- This option enables or disables prefetch insertion optimization. The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
- -Qauto-ilp32
- CXXOPTIMIZE
- This option instructs the compiler to analyze and transform the program so that 64-bit pointers are shrunk to 32-bit pointers wherever it is legal and safe to do so. In order for this option to be effective the compiler must be able to optimize using the -Qipo option and must be able to analyze all library/external calls the program makes.
  
  This option requires that the size of the program executable never exceed 2^32 bytes and all data values can be represented within 32 bits. If the program can run correctly in a 32-bit system, these requirements are implicitly satisfied. If the program violates these size restrictions, unpredictable behavior might occur.
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- shlW64M.lib
- EXTRA_CXXLIBS
- MicroQuill SmartHeap Library (64-bit) available from http://www.microquill.com/
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

Fortran benchmarks

465.tonto

- -QxSSE4.2
- PASS2_FFLAGS, PASS2_LDFLAGS
- Code is optimized for Intel(R) processors with support for SSE 4.2 instructions. The resulting code may contain unconditional use of features that are not supported on other processors. This option also enables new optimizations in addition to Intel processor-specific optimizations including advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
  
  Do not use this option if you are executing a program on a processor that is not an Intel processor. If you use this option on a non-compatible processor to compile the main program (in Fortran) or the function main() in C/C++, the program will display a fatal run-time error if they are executed on unsupported processors.
- -Qprof_gen
- PASS1_FFLAGS, PASS1_LDFLAGS
- Instrument program for profiling for the first phase of two-phase profile guided otimization. This instrumentation gathers information about a program's execution paths and data values but does not gather information from hardware performance counters. The profile instrumentation also gathers data for optimizations which are unique to profile-feedback optimization.
- -Qprof_use
- PASS2_FFLAGS, PASS2_LDFLAGS
- Instructs the compiler to produce a profile-optimized executable and merges available dynamic information (.dyn) files into a pgopti.dpi file. If you perform multiple executions of the instrumented program, -prof-use merges the dynamic information files again and overwrites the previous pgopti.dpi file.
  Without any other options, the current directory is searched for .dyn files
- -Qipo
- OPTIMIZE
- Multi-file ip optimizations that includes:
  - inline function expansion
  - interprocedural constant propogation
  - dead code elimination
  - propagation of function characteristics
  - passing arguments in registers
  - loop-invariant code motion
- -O3
- OPTIMIZE
- Enables O2 optimizations plus more aggressive optimizations, such as prefetching, scalar replacement, and loop and memory access transformations. Enables optimizations for maximum speed, such as:
  - Loop unrolling, including instruction scheduling
  - Code replication to eliminate branches
  - Padding the size of certain power-of-two arrays to allow more efficient cache use.
  On IA-32 and Intel EM64T processors, when O3 is used with options -ax or -x (Linux) or with options /Qax or /Qx (Windows), the compiler performs more aggressive data dependency analysis than for O2, which may result in longer compilation times.
  The O3 optimizations may not cause higher performance unless loop and memory access transformations take place. The optimizations may slow down code in some cases compared to O2 optimizations.
  The O3 option is recommended for applications that have loops that heavily use floating-point calculations and process large data sets. On IA-32 Windows platforms, -O3 sets the following:
  
  /GF (/Qvc7 and above), /Gf (/Qvc6 and below), and /Ob2
- Includes:
  - -GF
  - -Gf
  - -Ob_n
  - -O2
    - -Oi-
    - -Gs
    - -Oy
    - -Gy
    - -Os
    - -GF
    - -Gf
    - -Ob_n
    - -Og
    - -O1
      
      -Qunroll<n>
      
      -Oi-
      
      -Op-
      
      -Oy
      
      -Gy
      
      -Os
      
      -GF
      
      -Gf
      
      -Ob_n
      
      -Og
- -Qprec-div-
- OPTIMIZE
- (disable/enable[default] -prec-div)
  -Qprec-div- enables optimizations that give slightly less precise results than full IEEE division.
  
  When you specify -Qprec-div- along with some optimizations, such as /QxT, the compiler may change floating-point division computations into multiplication by the reciprocal of the denominator. For example, A/B is computed as A * (1/B) to improve the speed of the computation.
  
  However, sometimes the value produced by this transformation is not as accurate as full IEEE division. When it is important to have fully precise IEEE division, do not use -Qprec-div- which will enable the default -Qprec-div and the result is more accurate, with some loss of performance.
- -Qunroll4
- OPTIMIZE
- This option sets the maximum number of times a loop can be unrolled, to 4.
- -Qauto
- OPTIMIZE
- This option places local variables, except those declared as SAVE, to the run-time stack. It is as if the variables were declared with the AUTOMATIC attribute.
  
  It does not affect variables that have the SAVE attribute or ALLOCATABLE attribute, or variables that appear in an EQUIVALENCE statement or in a common block.
  
  This option may provide a performance gain for your program, but if your program depends on variables having the same value as the last time the routine was invoked, your program may not function properly.
  
  If you want to cause variables to be placed in static memory, specify /Qsave (Windows).
- /F1000000000
- EXTRA_LDFLAGS
- set the stack reserve amount specified to the linker
- -link /FORCE:MULTIPLE
- LDOUT
- Enable SmartHeap library usage by forcing the linker to ignore multiple definitions

Benchmarks using both Fortran and C

481.wrf

- basepeak = yes

Implicitly Included Flags

This section contains descriptions of flags that were included implicitly by other flags, but which do not have a permanent home at SPEC.

Commands and Options Used to Submit Benchmark Runs

Shell, Environment, and Other Software Settings

For questions about the meanings of these flags, please contact the tester.
For other inquiries, please contact webmaster@spec.org
Copyright 2006-2014 Standard Performance Evaluation Corporation
Tested with SPEC CPU2006 v1.2.
Report generated on Fri Jul 25 00:40:55 2014 by SPEC CPU2006 flags formatter v6906.

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

CPU2006 Flag DescriptionIntel Corporation Intel DQ87PG motherboard (Intel Pentium G3220)

Base Compiler Invocation

Peak Compiler Invocation

Base Portability Flags

Peak Portability Flags

Base Optimization Flags

Peak Optimization Flags

Implicitly Included Flags

CPU2006 Flag Description
Intel Corporation Intel DQ87PG motherboard (Intel Pentium G3220)