CPU2006 Flag Description
Oracle Corporation Sun Server X3-2 (Intel Xeon E5-2690 2.9GHz)

Compilers: Oracle Solaris Studio 12.3

Operating systems: Solaris 11

Last updated: 29-Mar-2012 gr

The text for many of the descriptions below was taken from the Oracle Studio Compiler Documentation, which is copyright © 2007-2012 Oracle Corporation, Inc. The original documentation can be found at docs.sun.com.

This document has both optimization flags (in the immediately following section) and a description of Platform Settings


Base Compiler Invocation

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C


Peak Compiler Invocation

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C


Base Portability Flags

410.bwaves

416.gamess

433.milc

434.zeusmp

435.gromacs

436.cactusADM

437.leslie3d

444.namd

447.dealII

450.soplex

453.povray

454.calculix

459.GemsFDTD

465.tonto

470.lbm

481.wrf

482.sphinx3


Peak Portability Flags

436.cactusADM

481.wrf


Base Optimization Flags

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C


Peak Optimization Flags

C benchmarks

433.milc

470.lbm

482.sphinx3

C++ benchmarks

444.namd

447.dealII

450.soplex

453.povray

Fortran benchmarks

410.bwaves

416.gamess

434.zeusmp

437.leslie3d

459.GemsFDTD

465.tonto

Benchmarks using both Fortran and C

435.gromacs

436.cactusADM

454.calculix

481.wrf


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=submit=echo 'pbind -b...' > dobmk; sh dobmk

submit=echo 'pbind -b...' > dobmk; sh dobmk
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. If so, the specific command may be found in the config file; here is a brief guide to understanding that command:


Shell, Environment, and Other Software Settings

This result has been formatted using multiple flags files. The "sw environment" from each of them appears next.


Sw environment from Oracle-Solaris-Studio12.3-x86_64

Oracle Corporation SPEC CPU Flags: Oracle-Solaris-Studio-x86_64

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.

/etc/system settings

autoup=<n>
When the file system flush daemon fsflush runs, it writes to disk all modified file buffers that are more than n seconds old.

lpg_alloc_prefer=<n>
0 = the OS may allocate remote pages if the size requested is readily available in a remote locality group (default)
1 = Set lgroup page allocation to strongly prefer local pages.

maxusers=<n>
To increase the number of user processes derived by the system

ncsize=<n>
Defines the number of entries in the directory name look-up cache (DNLC). This parameter is used by UFS, NFS, and ZFS to cache elements of path names that have been resolved.

rlim_fd_cur=<n>
Defines the soft limit on file descriptors that a single process can have open.

tune_t_fsflushr=<n>
Controls the number of seconds between runs of the file system flush daemon, fsflush.

zfs:zfs_arc_min=<n>
Controls the minimum amount of memory used in bytes by ZFS for caching of file system buffers.

zfs:zfs_arc_max=<n>
Controls the maximum amount of memory used in bytes by ZFS for caching of file system buffers.

Other Configurations

ZFS RAIDZ
In mirrored storage pool configuration, ZFS provides a RAID-Z configuration with either single or double parity fault tolerance. Single-parity RAID-Z is similar to RAID-5. Double-parity RAID-Z is similar to RAID-6.

Environment/shell variables

OMP_DYNAMIC=<TRUE|FALSE>
Enables (TRUE) or disables (FALSE) dynamic adjustment of the number of threads available for execution of parallel regions. The default is TRUE.

MTEXCLUSIVE=Y
By default, libmtmalloc allocates 2*NCPUS buckets from which allocations occur. Threads share buckets based on their thread ID. If MTEXCLUSIVE is invoked, then 4*NCPUS buckets are used. Threads with thread id less than 2*NCPUS receive an exclusive bucket and thus do not need to use locks. Allocation perfor- mance for these buckets may be dramatically increased. One enabled MTEXCLUSIVE can not be dis- abled. This feature can be enabled by setting the MTMALLOC_OPTION MTEXCLUSIVE to "Y" or "y" or any- thing beginning with "y". Alternatively it can be enabled by a call to mallocctl(3MALLOC).

OMP_NESTED=<TRUE|FALSE>
Enables or disables nested parallelism. Value is either TRUE or FALSE. The default is FALSE.

OMP_NUM_THREADS=<n>
If programs have been compiled with -xautopar, this environment variable can be set to the number of processors that programs should use.

PARALLEL=<n>
If programs have been compiled with -xautopar, this environment variable can be set to the number of processors that programs should use.

STACKSIZE=<n>
Set the size of the stack (temporary storage area) for each slave thread of a multithreaded program.

SUNW_MP_PROCBIND=<n>
This environment variable can be used to bind the LWPs (lightweight processes) managed by the microtasking library, libmtsk, to processors. Performance can be enhanced with processor binding, but performance degradation will occur if multiple LWPs are bound to the same processor.
The value for SUNW_MP_PROCBIND can be:

Integers in the above denote the "logical" processor IDs to which the LWPs are to be bound. Logical processor IDs are consecutive integers that start with 0, and may or may not be identical to the actual processsor IDs. If n processors are available online, then their logical processor IDs are 0, 1, ..., n-1.
By default, LWPs are not bound to processors. It is left up to the operating system, Solaris, to schedule LWPs onto processors.
If the value "TRUE" is used, the operating system will bind processes to processors, starting with processor 0.
If the value "SCATTER" is used, then the threads will be bound to virtual processors that are far apart.

SUNW_MP_THR_IDLE=SPIN
Controls the end-of-task status of each helper thread executing the parallel part of a program. You can set the value to spin, sleep ns, or sleep nms. The default is SPIN -- the thread spins (or busy-waits) after completing a parallel task until a new parallel task arrives. You can set the value to be one of the following: SLEEP( times), SLEEP(timems), SLEEP( timemc), where time is an integer that specifies an amount of time, and s, ms, and mc specify the time unit (seconds, milli-seconds, and micro-seconds, respectively).

ulimit -s <n>
Sets the stack size to n kbytes, or "unlimited" to allow the stack size to grow without limit.


Sw environment from Oracle-platform-x86_64.CPUv1.2-RevA

SPEC CPU2006 Platform Settings for Intel-based systems

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
ulimit -s <n>
Sets the stack size to n kbytes, or unlimited to allow the stack size to grow without limit.

Firmware / BIOS / Microcode Settings

Hardware Prefetch:
This BIOS option allows the enabling/disabling of a processor mechanism to prefetch data into the cache according to a pattern-recognition algorithm In some cases, setting this option to Disabled may improve performance. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.
Adjacent Sector Prefetch:
This BIOS option allows the enabling/disabling of a processor mechanism to fetch the adjacent cache line within a 128-byte sector that contains the data needed due to a cache line miss. In some cases, setting this option to Disabled may improve performance. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.
Adjacent Cache Line Prefetch:
This BIOS option allows the enabling/disabling of a processor mechanism to fetch the adjacent cache line within a 128-byte sector that contains the data needed due to a cache line miss. In some cases, setting this option to Disabled may improve performance. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.
L1 Data Prefetch: Enabled:
This BIOS option allows the enabling/disabling L1 cache Data prefetch.
C-State : Disabled
Enable/Disable CPUs to enter C-State (lower power CPU state) while the system is idle. This helps to lower power consumption when enabled.
Data Reuse Optimization : Disabled
Enabling this BIOS option reduces the frequency of L3 cache updates from L1. This may improve performance by reducing the internal bandwidth consumed by constantly updating L1 cache lines in L3. Since this results in more fetches to main memory, setting this option to Disabled may improve performance in some cases. Users should only disable this option after performing application benchmarking to verify improved performance in their environment.
Intel HT Technology : Disabled
This BIOS setting disables/enables Intel Hyper-Threading (HT) Technology. With Intel HT Technology, the operating system can execute two threads in parallel within each processor core.

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/Oracle-Solaris-Studio12.3-x86_64.html,
http://www.spec.org/cpu2006/flags/Oracle-platform-x86_64.CPUv1.2-RevA.20120425.html.

You can also download the XML flags sources by saving the following links:
http://www.spec.org/cpu2006/flags/Oracle-Solaris-Studio12.3-x86_64.xml,
http://www.spec.org/cpu2006/flags/Oracle-platform-x86_64.CPUv1.2-RevA.20120425.xml.


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 Thu Jul 24 11:27:33 2014 by SPEC CPU2006 flags formatter v6906.