Base Compiler Invocation
C benchmarks
-
- icc
![[user]](http://www.spec.org/auto/accel/flags/user.png)
- CC, LD
-
Invoke the Intel C compiler.
Fortran benchmarks
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- ifort
- FC, LD
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Invoke the Intel Fortran compiler.
Compilers: Intel c/c++/fortran Compiler 17.0.3.191
Operating systems: Linux
Last updated: 04-Apr-2017
The text for many of the descriptions below was taken from the "icc --help".
Copyright © 1985-2017 Intel Corporation. All Rights Reserved.
Invoke the Intel C compiler.
Invoke the Intel Fortran compiler.
![[benchmark]](http://www.spec.org/auto/accel/flags/benchmark.png)
Enable use of SIMD directive inside of loop rather than on outer loop.
Enables the use of nested SIMD statements for OpenMP.
Enables the use of nested SIMD statements for OpenMP.
Enable use of SIMD directive inside of loop rather than on outer loop.
FPORTABILITY flag
Enable use of SIMD directive inside of loop rather than on outer loop.
Enables the use of nested SIMD statements for OpenMP.
Enable use of SIMD directive inside of loop rather than on outer loop.
Enables the use of nested SIMD statements for OpenMP.
Enable use of SIMD directive inside of loop rather than on outer loop.
Enable use of SIMD directive inside of loop rather than on outer loop.
Enable use of SIMD directive inside of loop rather than on outer loop.
Enable use of SIMD directive inside of loop rather than on outer loop.
No Fortran main method exists, use C equivalent instead.
Enables the use of nested SIMD statements for OpenMP.
Enable use of SIMD directive inside of loop rather than on outer loop.
Enable use of SIMD directive inside of loop rather than on outer loop.
optimize for maximum speed and enable more aggressive optimizations that may not improve performance on some programs
May generate Intel(R) Advanced Vector Extensions 512 (Intel(R) AVX-512) Foundation instructions, Intel(R) AVX-512 Conflict Detection instructions, as well as the instructions enabled with CORE-AVX2. Optimizes for Intel(R) processors that support Intel(R) AVX-512 instructions.
Enable the compiler to generate multi-threaded code based on the OpenMP* directives (same as -fopenmp)
Enables OpenMP* offloading compilation for target pragmas. This
option only applies to Intel(R) MIC Architecture and Intel(R)
Graphics Technology. Enabled by default with -qopenmp.
Use -qno-openmp-offload to disable.
Specify kind to specify the default device for target pragmas
host - allow target code to run on host system while still doing
the outlining for offload
mic - specify Intel(R) MIC Architecture
gfx - specify Intel(R) Graphics Technology
optimize for maximum speed and enable more aggressive optimizations that may not improve performance on some programs
May generate Intel(R) Advanced Vector Extensions 512 (Intel(R) AVX-512) Foundation instructions, Intel(R) AVX-512 Conflict Detection instructions, as well as the instructions enabled with CORE-AVX2. Optimizes for Intel(R) processors that support Intel(R) AVX-512 instructions.
Enable the compiler to generate multi-threaded code based on the OpenMP* directives (same as -fopenmp)
Enables OpenMP* offloading compilation for target pragmas. This
option only applies to Intel(R) MIC Architecture and Intel(R)
Graphics Technology. Enabled by default with -qopenmp.
Use -qno-openmp-offload to disable.
Specify kind to specify the default device for target pragmas
host - allow target code to run on host system while still doing
the outlining for offload
mic - specify Intel(R) MIC Architecture
gfx - specify Intel(R) Graphics Technology
optimize for maximum speed and enable more aggressive optimizations that may not improve performance on some programs
May generate Intel(R) Advanced Vector Extensions 512 (Intel(R) AVX-512) Foundation instructions, Intel(R) AVX-512 Conflict Detection instructions, as well as the instructions enabled with CORE-AVX2. Optimizes for Intel(R) processors that support Intel(R) AVX-512 instructions.
Enable the compiler to generate multi-threaded code based on the OpenMP* directives (same as -fopenmp)
Enables OpenMP* offloading compilation for target pragmas. This
option only applies to Intel(R) MIC Architecture and Intel(R)
Graphics Technology. Enabled by default with -qopenmp.
Use -qno-openmp-offload to disable.
Specify kind to specify the default device for target pragmas
host - allow target code to run on host system while still doing
the outlining for offload
mic - specify Intel(R) MIC Architecture
gfx - specify Intel(R) Graphics Technology
This result has been formatted using multiple flags files. The "sw environment" from each of them appears next.
Mode will maximize the absolute performance of the system without regard for power. In this mode, power consumption is a don't care. Things like fan speed and heat output of the system may increase in addition to power consumption. Efficiency of the system may go down in this mode, but the absolute performance may increase depending on the workload that is running.
Custom
Allows the user to individually modify any of the low-level settings that are preset and unchangeable in any of the other 4 preset modes.
Hyper-ThreadingEnabling Hyper-Threading let operating system addresses two virtual or logical cores for a physical presented core. Workloads can be shared between virtual or logical cores when possible. The main function of hyper-threading is to increase the number of independent instructions in the pipeline for using the processor resources more efficiently.
C-StatesLegacy: When "Legacy" is selected, the operating system initiates the C-state transitions. For E5/E7 CPUs, ACPI C1/C2/C3 map to Intel C1/C3/C6. For 6500/7500 CPUs, ACPI C1/C3 map to Intel C1/C3 (ACPI C2 is not available). Some OS SW may defeat the ACPI mapping (e.g. intel_idle driver). Autonomous: When "Autonomous" is selected, HALT and C1 request get converted to C6 requests in hardware. Disable: When "Disable" is selected, only C0 and C1 are used by the OS. C1 gets enabled automatically when an OS autohalts.
Persistence ModeA tool for maintaining persistent driver state, specifically for use by the NVIDIA Linux driver. When persistence mode is enabled, the daemon prevents the driver from releasing device state when the device is not in use. This can improve the startup time of new clients in this scenario. Use nvidia-smi -pm 1 to enable persistence mode. Use nvidia-smi -pm 0 to diaable persistence mode.
BIOS settings
Maximum Performance
Mode will maximize the absolute performance of the system without regard for power.In this mode, power consumption is a don't care. Things like fan speed and heat output of the system may increase in addition to power consumption. Efficiency of the system may go down in this mode, but the absolute performance may increase depending on the workload that is running.
Custom
Allows the user to individually modify any of the low-level settings that are preset and unchangeable in any of the other 4 preset modes.
Hyper-Threading
Enabling Hyper-Threading let operating system addresses two virtual or logical cores for a physical presented core. Workloads can be shared between virtual or logical cores when possible. The main function of hyper-threading is to increase the number of independent instructions in the pipeline for using the processor resources more efficiently.
C-States
Legacy: When "Legacy" is selected, the operating system initiates the C-state transitions. For E5/E7 CPUs, ACPI C1/C2/C3 map to Intel C1/C3/C6. For 6500/7500 CPUs, ACPI C1/C3 map to Intel C1/C3 (ACPI C2 is not available). Some OS SW may defeat the ACPI mapping (e.g. intel_idle driver).
Autonomous: When "Autonomous" is selected, HALT and C1 request get converted to C6 requests in hardware.
Disable: When "Disable" is selected, only C0 and C1 are used by the OS. C1 gets enabled automatically when an OS autohalts.
Platform settings
One or more of the following settings may have been applied to the testbed. 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.
ulimit -s <n> (Unix)
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. |
![[suite]](http://www.spec.org/auto/accel/flags/suite.png) |
Indicates that the flag description came from the suite-wide flags file. |
|
Indicates that the flag description came from a per-benchmark flags file. |
For questions about the meanings of these flags, please contact the tester.
For other inquiries, please contact webmaster@spec.org
Copyright 2015-2019 Standard Performance Evaluation Corporation
Tested with SPEC ACCEL v1.2.
Report generated on Tue Apr 2 13:42:30 2019 by SPEC ACCEL flags formatter v1290.