CPU2006 Flag Description
ACTION S.A. ACTINA SOLAR 210 X6 (Intel Xeon E5-2698 v3, 2.30 GHz)

Copyright © 2006 Intel Corporation. All Rights Reserved.


Base Compiler Invocation

C benchmarks

C++ benchmarks


Peak Compiler Invocation

C benchmarks (except as noted below)

400.perlbench

445.gobmk

C++ benchmarks (except as noted below)

473.astar


Base Portability Flags

400.perlbench

401.bzip2

403.gcc

429.mcf

445.gobmk

456.hmmer

458.sjeng

462.libquantum

464.h264ref

471.omnetpp

473.astar

483.xalancbmk


Peak Portability Flags

400.perlbench

401.bzip2

403.gcc

429.mcf

456.hmmer

458.sjeng

462.libquantum

464.h264ref

473.astar

483.xalancbmk


Base Optimization Flags

C benchmarks

C++ benchmarks


Peak Optimization Flags

C benchmarks

400.perlbench

401.bzip2

403.gcc

429.mcf

445.gobmk

456.hmmer

458.sjeng

462.libquantum

464.h264ref

C++ benchmarks

471.omnetpp

473.astar

483.xalancbmk


Base Other Flags

C benchmarks

403.gcc


Peak Other Flags

C benchmarks

403.gcc


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

submit= MYMASK=`printf '0x%x' $((1<<$SPECCOPYNUM))`; /usr/bin/taskset $MYMASK $command
When running multiple copies of benchmarks, the SPEC config file feature submit is used to cause individual jobs to be bound to specific processors. This specific submit command, using taskset, is used for Linux64 systems without numactl.
Here is a brief guide to understanding the specific command which will be found in the config file:
submit= numactl --localalloc --physcpubind=$SPECCOPYNUM $command
When running multiple copies of benchmarks, the SPEC config file feature submit is used to cause individual jobs to be bound to specific processors. This specific submit command is used for Linux64 systems with support for numactl.
Here is a brief guide to understanding the specific command which will be found in the config file:

Shell, Environment, and Other Software Settings

numactl --interleave=all "runspec command"
Launching a process with numactl --interleave=all sets the memory interleave policy so that memory will be allocated using round robin on nodes. When memory cannot be allocated on the current interleave target fall back to other nodes.
KMP_STACKSIZE
Specify stack size to be allocated for each thread.
KMP_AFFINITY
Syntax: KMP_AFFINITY=[<modifier>,...]<type>[,<permute>][,<offset>]
The value for the environment variable KMP_AFFINITY affects how the threads from an auto-parallelized program are scheduled across processors.
It applies to binaries built with -openmp and -parallel (Linux and Mac OS X) or /Qopenmp and /Qparallel (Windows).
modifier:
    granularity=fine Causes each OpenMP thread to be bound to a single thread context.
type:
    compact Specifying compact assigns the OpenMP thread <n>+1 to a free thread context as close as possible to the thread context where the <n> OpenMP thread was placed.
    scatter Specifying scatter distributes the threads as evenly as possible across the entire system.
permute: The permute specifier is an integer value controls which levels are most significant when sorting the machine topology map. A value for permute forces the mappings to make the specified number of most significant levels of the sort the least significant, and it inverts the order of significance.
offset: The offset specifier indicates the starting position for thread assignment.

Please see the Thread Affinity Interface article in the Intel Composer XE Documentation for more details.

Example: KMP_AFFINITY=granularity=fine,scatter
Specifying granularity=fine selects the finest granularity level and causes each OpenMP or auto-par thread to be bound to a single thread context.
This ensures that there is only one thread per core on cores supporting HyperThreading Technology
Specifying scatter distributes the threads as evenly as possible across the entire system.
Hence a combination of these two options, will spread the threads evenly across sockets, with one thread per physical core.

Example: KMP_AFFINITY=compact,1,0
Specifying compact will assign the n+1 thread to a free thread context as close as possible to thread n.
A default granularity=core is implied if no granularity is explicitly specified.
Specifying 1,0 sets permute and offset values of the thread assignment.
With a permute value of 1, thread n+1 is assigned to a consecutive core. With an offset of 0, the process's first thread 0 will be assigned to thread 0.
The same behavior is exhibited in a multisocket system.
OMP_NUM_THREADS
Sets the maximum number of threads to use for OpenMP* parallel regions if no other value is specified in the application. This environment variable applies to both -openmp and -parallel (Linux and Mac OS X) or /Qopenmp and /Qparallel (Windows). Example syntax on a Linux system with 8 cores: export OMP_NUM_THREADS=8
Set stack size to unlimited
The command "ulimit -s unlimited" is used to set the stack size limit to unlimited.
Free the file system page cache
The command "echo 1> /proc/sys/vm/drop_caches" is used to free up the filesystem page cache.

Red Hat Specific features

Transparent Huge Pages
On RedHat EL 6 and later, Transparent Hugepages increase the memory page size from 4 kilobytes to 2 megabytes. Transparent Hugepages provide significant performance advantages on systems with highly contended resources and large memory workloads. If memory utilization is too high or memory is badly fragmented which prevents hugepages being allocated, the kernel will assign smaller 4k pages instead.
Hugepages are used by default unless the /sys/kernel/mm/redhat_transparent_hugepage/enabled field is changed from its RedHat EL6 default of 'always'.

Firmware / BIOS / Microcode Settings

Power & Performance:
    This BIOS option define Power Management on server.
    This can be one of the following:  [Performance], [Balanced Performance], [Balanced Power] or [Power].
    [Performance] option - optimization is strongly toward performance, even at the expense of energy efficiency.
    Users should set this option as [Performance] for performing application benchmarking.
    
Intel(R) Hyper-Threading Tech:
    Enabling this option allows to use processor resources more efficiently, enabling multiple threads to run on each core
    and increases processor throughput, improving overall performance on threaded software.
    This can be one of the following:  [Enable] or [Disable].
    Users should set this option as [Enable] for SPECint_rate2006 and SPECfp_rate2006.
    Users should set this option as [Disable] for SPECint2006 and SPECfp2006.
    
Enforce POR:
    Enable to enforce POR restriction for DDR4 frequency and voltage programming.
    This can be one of the following:  [Disabled] or [Enabled].
    When memory modules are populated in two or more Dimm Per Channel, users should set this option as [Disabled] for manually selecting Memory Frequency.
    
Memory Operating Speed Selection:
    This can be one of the following: [Auto], [1333], [1600], [1866], [2133].
    When Enforce POR option is set as [Disabled], users can manually set Memory Frequency to maximum supported by the processor.
    
Cluster-on-Die:
    This Bios option is visible for Intel(R) E5-26xx v3 processors with 10+ cores.
    Enabling this option reduce coherence traffic and cache-to-cache transfer latencies.
    This can be one of the following:  [Enable] or [Disable].
    Users should set this option as [Enable] for performing application benchmarking.
    
Set Fan Profile:
    This feature allows manually selecting cooling mode.
    This can be one of the following:  [Performance], or [Acoustic].
    [Performance] - Fan control provides primary system cooling before attempting to throttle memory.
    [Acoustic] - The system will favor using throttling of memory over boosting fans to cool the system if thermal thresholds are met.
    Users should set this option as [Performance] for performing application benchmarking.
    
Fan PWM Offset:
    This number is added to the calculated PWM value to increase Fan Speed.
    Users can set this option from 0 to 100.
    For best cooling (fans full speed) users can set this option as 100.
    

Flag description origin markings:

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

The flags files that were used to format this result can be browsed at
http://www.spec.org/cpu2006/flags/Intel-ic16.0-official-linux64.html,
http://www.spec.org/cpu2006/flags/ACTION.SA-Platform-Flags-RevB-aug-2015-For-Intel-Platform.html.

You can also download the XML flags sources by saving the following links:
http://www.spec.org/cpu2006/flags/Intel-ic16.0-official-linux64.xml,
http://www.spec.org/cpu2006/flags/ACTION.SA-Platform-Flags-RevB-aug-2015-For-Intel-Platform.xml.


For questions about the meanings of these flags, please contact the tester.
For other inquiries, please contact webmaster@spec.org
Copyright 2006-2015 Standard Performance Evaluation Corporation
Tested with SPEC CPU2006 v1.2.
Report generated on Tue Dec 15 16:46:27 2015 by SPEC CPU2006 flags formatter v6906.