Base Compiler Invocation
C benchmarks
-
- icc
![[user]](http://www.spec.org/auto/cpu2006/flags/user.png)
- CC, LD
-
Invoke the Intel C compiler.
Also used to invoke linker for C programs.
C++ benchmarks
-
- icpc
- CXX, LD
-
Invoke the Intel C++ compiler.
Also used to invoke linker for C++ programs.
Compilers: Intel Compilers for C++ and Fortran, Version 10.0
for IA32/EM64T-based applications in Linux_x64
Operating system: SuSE Linux Enterprise Server 10 (x86_64)
Invoke the Intel C compiler.
Also used to invoke linker for C programs.
Invoke the Intel C++ compiler.
Also used to invoke linker for C++ programs.
Invoke the Intel C compiler.
Also used to invoke linker for C programs.
/opt/intel/cce/10.0.023/bin/icc invokes the 64-bit Intel C compiler.
Also used to invoke linker for 64-bit C programs.
-L/opt/intel/cce/10.0.023/lib is the library path of 64-bit Intel C/C++ compiler
-I/opt/intel/cce/10.0.023/include is the include path of 64-bit Intel C/C++ compiler
/opt/intel/cce/10.0.023/bin/icc invokes the 64-bit Intel C compiler.
Also used to invoke linker for 64-bit C programs.
-L/opt/intel/cce/10.0.023/lib is the library path of 64-bit Intel C/C++ compiler
-I/opt/intel/cce/10.0.023/include is the include path of 64-bit Intel C/C++ compiler
Invoke the Intel C++ compiler.
Also used to invoke linker for C++ programs.
![[benchmark]](http://www.spec.org/auto/cpu2006/flags/benchmark.png)
This macro indicates that the benchmark is being compiled on an Intel IA32-compatible system running the Linux operating system.
Portability changes for Linux
This flag can be set for SPEC compilation for Linux using default compiler.
This macro indicates that the benchmark is being compiled on an Intel IA32-compatible system running the Linux operating system.
![[suite]](http://www.spec.org/auto/cpu2006/flags/suite.png)
This option is used to indicate that the host system's integers are 32-bits wide, and longs 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.
This option is used to indicate that the host system's integers are 32-bits wide, and longs 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.
Portability changes for Linux
This flag can be set for SPEC compilation for Linux using default compiler.
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
This option prevents linking with shared libraries. It causes the executable to link all libraries statically.
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
syntax: -Wl,-z,muldefs
Enable SmartHeap and/or other library usage by forcing the linker to ignore multiple definitions if present
-L
when used as an EXTRA_CLIB or EXTRA_CXXLIB variable,
results in linking with MicroQuill's SmartHeap 8.1 (32-bit) library
for Linux. This is a library that optimizes calls to new, delete, malloc and free.
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.
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
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
Enable use of ANSI aliasing rules in optimizations.
This option tells the compiler to assume that the program adheres to ISO C Standard aliasability rules. If your program adheres to these rules, then this option allows the compiler to optimize more aggressively. If it doesn't adhere to these rules, then it can cause the compiler to generate incorrect code.
This option enables prefetch insertion optimization. To use this option, you must also specify O3.
The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
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.
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
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
This option prevents linking with shared libraries. It causes the executable to link all libraries statically.
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
This option enables prefetch insertion optimization. To use this option, you must also specify O3.
The goal of prefetching is to reduce cache misses by providing hints to the processor about when data should be loaded into the cache.
-L
when used as an EXTRA_CLIB or EXTRA_CXXLIB variable,
results in linking with MicroQuill's SmartHeap 8.1 (32-bit) library
for Linux. This is a library that optimizes calls to new, delete, malloc and free.
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.
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
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
This is the default level of optimization. Optimizes for speed. The -O2 option includes O1 optimizations and in addition enables inlining of intrinsics and more speed optimizations.
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
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
Enable use of ANSI aliasing rules in optimizations.
This option tells the compiler to assume that the program adheres to ISO C Standard aliasability rules. If your program adheres to these rules, then this option allows the compiler to optimize more aggressively. If it doesn't adhere to these rules, then it can cause the compiler to generate incorrect code.
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.
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
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
This option prevents linking with shared libraries. It causes the executable to link all libraries statically.
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
Tells the compiler the maximum number of times to unroll loops.
Enable use of ANSI aliasing rules in optimizations.
This option tells the compiler to assume that the program adheres to ISO C Standard aliasability rules. If your program adheres to these rules, then this option allows the compiler to optimize more aggressively. If it doesn't adhere to these rules, then it can cause the compiler to generate incorrect code.
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.
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
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
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
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
This option prevents linking with shared libraries. It causes the executable to link all libraries statically.
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
Tells the compiler the maximum number of times to unroll loops.
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.
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
The -xN and -xP options target your program to run on Intel Pentium 4 and compatible Intel processors. The resulting code might contain unconditional use of features that are not supported on other processors. Programs, where the function main() is compiled with this option, will detect non compatible processors and generate an error message during execution. This option also enables new optimizations in addition to Intel processor specific optimizations.
These options also enable advanced data layout and code restructuring optimizations to improve memory accesses for Intel processors.
Builds on -01 and -02 optimizations by enabling high-level optimization. This level does not guarantee higher performance unless loop and memory access transformation take place. In conjunction with -axK/-xK and -axW/-xW, this switch causes the compiler to perform more aggressive data dependency analysis than for -O2. This may result in longer compilation times. On Linux platforms, -O3 sets the following:
-fp
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
(disable/enable[default] -Qprec-div[-]) (Windows) [-no]-prec-div (Linux)
-Qprec-dev (Windows) and -prec-div (Linux) improves precision of floating-point divides. It has a slight impact on speed. -Qprec-dev- (Windows) and -no-prec-div (Linux) disables this option and enables optimizations that give slightly less precise results than full IEEE division.
When you specify -Qprec-dev- (Windows) or -no-prec-div (Linux) along with some optimizations, such as -xN and -xB (Linux) or /QxN and /QxB (Windows), 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-dev- (Windows) or -no-prec-div (Linux) which will enable the default -Qprec-dev (Windows) or -prec-div (Linux) and the result is more accurate, with some loss of performance.
Enable use of ANSI aliasing rules in optimizations.
This option tells the compiler to assume that the program adheres to ISO C Standard aliasability rules. If your program adheres to these rules, then this option allows the compiler to optimize more aggressively. If it doesn't adhere to these rules, then it can cause the compiler to generate incorrect code.
syntax: -Wl,-z,muldefs
Enable SmartHeap and/or other library usage by forcing the linker to ignore multiple definitions if present
-L
when used as an EXTRA_CLIB or EXTRA_CXXLIB variable,
results in linking with MicroQuill's SmartHeap 8.1 (32-bit) library
for Linux. This is a library that optimizes calls to new, delete, malloc and free.
This allows alloca to be set to the compiler's preferred alloca by SPEC rules.
This allows alloca to be set to the compiler's preferred alloca by SPEC rules.
This section contains descriptions of flags that were included implicitly by other flags, but which do not have a permanent home at SPEC.
Disable using EBP as general purpose register.
This is the default level of optimization. Optimizes for speed. The -O2 option includes O1 optimizations and in addition enables inlining of intrinsics and more speed optimizations.
optimize for speed, but disable some optimizations which increase code size for a small speed benefit. Includes inline expansion except for intrinsic functions, global optimizations, string pooling optimizations. On Linux platforms, -O1 sets the following:
-unroll0, -fno-builtin -mno-ieee-fp -fomit-frame-pointer -ffunction-sections
Tells the compiler the maximum number of times to unroll loops.
Disables inline expansion of all intrinsic functions.
Enables improved floating-point consistency. Floating-point operations are not reordered and the result of each floating-point operation is stored in the target variable rather than being kept in the floating- point processor for use in a subsequent calculation. This is the same as specifying -fltconsistency or -mp.
The default, -mno-ieee-fp, provides better accuracy and run-time per- formance at the expense of less consistent floating-point results.
Enable using EBP as general purpose register.
Separate functions for the linker (COMDAT). Same as -fdata-sections.
Platform settings
One or more of the following settings may have been set. If so, the "Platform Notes" section of the report will say so; and you can read below to find out more about what these settings mean.
Power Regulator for ProLiant support (Default=HP Dynamic Power Savings Mode)
Values for this BIOS setting can be:
Adjacent Sector Prefetch (Default = Enabled):
This BIOS option allows the enabling/disabling of a processor mechanism to fetch the adjacent cache line within an 128-byte sector that contains the data needed due to a cache line miss.
In some limited cases, setting this option to Disabled may improve performance. In the majority of cases, the default value of Enabled provides better performance. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.
Hardware Prefetch (Default = Enabled):
This BIOS option allows allows the enabling/disabling of a processor mechanism to prefetch data into the cache according to a pattern recognition algorithm.
In some limited cases, setting this option to Disabled may improve performance. In the majority of cases, the default value of Enabled provides better performance. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.
submit= MYMASK=`printf '0x%x' \$((1<<\$SPECCOPYNUM))`; /usr/bin/taskset \$MYMASK $command
When running multiple copies of benchmarks, the SPEC config file feature submit is sometimes used to cause individual jobs to be bound to specific processors. This specific submit command is used for Linux. The description of the elements of the command are:
ulimit -s
Sets the stack size to n kbytes, or unlimited to allow the stack size to grow without limit.
Flag description origin markings:
|
Indicates that the flag description came from the user flags file. |
|
Indicates that the flag description came from the suite-wide flags file. |
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Indicates that the flag description came from a per-benchmark flags file. |
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Copyright 2006-2014 Standard Performance Evaluation Corporation
Tested with SPEC CPU2006 v1.0.
Report generated on Tue Jul 22 12:24:05 2014 by SPEC CPU2006 flags formatter v6906.