CPU2017 Flag Description
Hewlett Packard Enterprise ProLiant DL380 Gen9 (2.40 GHz, Intel Xeon E5-2699A v4)

Test sponsored by HPE

Copyright © 2016 Intel Corporation. All Rights Reserved.


Base Compiler Invocation

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C

Benchmarks using both C and C++

Benchmarks using Fortran, C, and C++


Peak Compiler Invocation

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C

Benchmarks using both C and C++

Benchmarks using Fortran, C, and C++


Base Portability Flags

503.bwaves_r

507.cactuBSSN_r

508.namd_r

510.parest_r

511.povray_r

519.lbm_r

521.wrf_r

526.blender_r

527.cam4_r

538.imagick_r

544.nab_r

549.fotonik3d_r

554.roms_r


Peak Portability Flags

503.bwaves_r

507.cactuBSSN_r

508.namd_r

510.parest_r

511.povray_r

519.lbm_r

521.wrf_r

526.blender_r

527.cam4_r

538.imagick_r

544.nab_r

549.fotonik3d_r

554.roms_r


Base Optimization Flags

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C

Benchmarks using both C and C++

Benchmarks using Fortran, C, and C++


Peak Optimization Flags

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C

Benchmarks using both C and C++

Benchmarks using Fortran, C, and C++


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 -qopenmp 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 -qopenmp 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'.

Operating System Tuning Parameters

OS Tuning

Drive Write Cache

The Drive Write Cache is an option that can be enabled or disabled in the HP Array Configuration Utility, CLI version. The default value for the Drive Write Cache is set to Disabled, and in order to change this the HP Array Configuration Utility, CLI version needs to be installed. When the Drive Write Cache option is enabled on a HP Smart Array Controller in a system, it can allow the HP Smart Array Controller to help make drive writes more efficient.

Accelerator Ratio

The Accelerator Ratio is an option that can be set to different percentages (in 25% increments) in the HP Array Configuration Utility, CLI version. The default value for the Accelerator Ratio is set to 0% Read and 100% Write. In order to change this the HP Array Configuration Utility, CLI version needs to be installed. Changing the Accelerator Ratio allows the array installed on the HP Smart Array Controller to adjust how the priority of reads and writes.

ulimit -s [n | unlimited] (Linux)

Sets the stack size to n kbytes, or unlimited to allow the stack size to grow without limit.

vm.max_map_count-n (Linux)

The maximum number of memory map areas a process may have. Memory map areas are used as a side-effect of calling malloc, directly by mmap and mprotect, and also when loading shared libraries.

Zone Reclaim:

Zone reclaim allows the reclaiming of pages from a zone if the number of free pages falls below a watermark even if other zones still have enough pages available. Reclaiming a page can be more beneficial than taking the performance penalties that are associated with allocating a page on a remote zone, especially for NUMA machines.

Disabled unused Linux services via stop_services.sh script.

The following unused Linux services were disabled before the run in simple shell scirpt via the command "service {name} stop": abrt-ccpp, abrt-oops, abrtd, acpid, atd, auditd, autofs, avahi-daemon, cgconfig, cpuspeed, crond, cups, haldaemon, irqbalance, kdump, libvirt-guests, mcelogd, mdmonitor, messagebus, portreserve, postfix, rhnsd, rhsmcertd, rpcbind, rpcgssd, rpcidmapd, certmonger, lvm2-monitor, netfs, and sysstat.


Firmware / BIOS / Microcode Settings

Firmware 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.

Intel Hyperthreading Options (Default = Enabled):

This feature allows enabling/disabling of logical processor cores on processors supporting Intel's Hyperthreading Technology. When enabled, each physical processor core operates as two logical processor cores. When disabled, each physical core operates as only one logical processor core. Enabling this option can improve overall performance for applications that benefit from a higher processor core count.

HP Power Profile (Default = Balanced Power and Performance):

Values for this BIOS setting can be:

HP Power Regulator (Default = HP Dynamic Power Savings Mode)

This option can only be configured if the HP Power Profile is set to Custom. Values for this BIOS setting can be:

Minimum Processor Idle Power Core C-State (Default = C6 State):

This option can only be configured if the HP Power Profile is set to Custom. This feature selects the processor's lowest idle core power state (C-state) that the operating system uses. The higher the C-state, the lower the power usage of that idle state (C6 is the lowest power idle state supported by the processor). Values for this setting can be:

Minimum Processor Idle Power Core C-State (Default = C6 State):

This option can only be configured if the HP Power Profile is set to Custom. This feature selects the processor's lowest idle package power state (C-state) that the operating system uses. The higher the C-state, the lower the power usage of that idle state (C6 is the lowest power idle state supported by the processor). Values for this setting can be:

Minimum Processor Idle Power Package C-State (Default = Package C6(retention) State):

This option can only be configured if the HP Power Profile is set to Custom. This feature selects the processor's lowest idle package power state (C-state) that is enabled. The processor will automatically transition into the package C-states based on the Core C-states, in which cores on the processor have transitioned. The higher the package C-state, the lower the power usage of that idle package state (Package C6(retention) is the lowed power idle package state supported by the processor). Values for this setting can be:

Energy/Performance Bias (Default = Balanced Performance):

This option can only be configured if the HP Power Profile is set to Custom. This option configures several processor subsystems to optimize the processor's performance and power usage. Values for this BIOS setting can be:

Collaborative Power Control (Default = Enabled):

This BIOS option allows the enabling/disabling of the Processor Clocking Control (PCC) Interface, for operating systems which support this feature. Enabling this option allows the Operating System to request processor frequency changes even when the server has the Power Regulator option configured for Dynamic Power Savings Mode.

For Operating Systems that do not support the PCC Interface or when the Power Regulator Mode is not configured for Dynamic Power Savings Mode, his option has no impact on system operation.

QPI Snoop Configuration (Default = Home Snoop):

This option allows the user to choose the snoop mode used by the processor and QPI (Quick Path Interconnect) bus. Snooping is a process where the individual caches monitor address lines for accesses to memory locations that have cached. Changing this option can have an impact on memory performance. The performance of various workloads will vary depending on the mode selected and the order in which they are listed here does not reflect any technical ordering or ranking. The order seen here reflects the order as currently seen in the BIOS. Values for this setting can be:

Thermal Configuration (Default = Optimal Cooling):

This feature allows the user to select the fan cooling solution for the system. Values for this BIOS option can be:

Processor Power and Utilization Monitoring (Default = Enabled):

This BIOS option allows the enabling/disabling of iLo Processor State Mode Switching and Insight Power Management Processor Utilization Monitoring.

When set to disabled, the system will also set the HP Power Regulator mode to HP Static High Performance mode and the HP Power Profile mode to Custom. This option may be useful in some environments that require absolute minimum latency.

Memory Patrol Scrubbing (Default = Enabled):

This BIOS option allows the enabling/disabling of Memory Periodic Patrol Scrubber. The Memory Periodic Patrol Scrubber corrects memory soft errors so that, over the length of the system runtime, the risk of producing multi-bit and uncorrectable errors is reduced.

Memory Refresh Rate (Default = 2x Refresh):

This BIOS option controls the refresh rate of the memory controller and may affect the performance and resiliency of the servers memory.

When set to 1x Refresh, the memory refresh rate will be decreased, the HP Power Regulator mode will be set to HP Static High Performance mode, and the HP Power Profile mode to Custom. This option may be useful in some environments that require absolute minimum latency.

When set to 3x Refresh, the memory refresh rate will be increased, the HP Power Regulator mode will be set to HP Static High Performance mode, and the HP Power Profile mode to Custom.

Last updated October 17th, 2014.


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/cpu2017/flags/Intel-ic17.0-official-linux64-revD.html,
http://www.spec.org/cpu2017/flags/HP-Platform-Flags-Intel-V1.2-HSW-revE.html.

You can also download the XML flags sources by saving the following links:
http://www.spec.org/cpu2017/flags/Intel-ic17.0-official-linux64-revD.xml,
http://www.spec.org/cpu2017/flags/HP-Platform-Flags-Intel-V1.2-HSW-revE.xml.


For questions about the meanings of these flags, please contact the tester.
For other inquiries, please contact info@spec.org
Copyright 2017 Standard Performance Evaluation Corporation
Tested with SPEC CPU2017 v0.904.0.
Report generated on 2017-06-20 11:31:40 by SPEC CPU2017 flags formatter v5178.