CPU2006 Flag Description
Sun Microsystems Sun SPARC Enterprise M8000

Compilers: Sun Studio 12

Operating systems: Solaris 10

Last updated: 10-Apr-2007 jh

The text for many of the descriptions below was taken from the Sun Studio Compiler Documentation, which is copyright © 2005 Sun Microsystems, Inc. The original documentation can be found at docs.sun.com.

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 Optimization Flags

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C

Peak Optimization Flags

C benchmarks




C++ benchmarks





Fortran benchmarks







Benchmarks using both Fortran 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.

System and Other Tuning Information

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.

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

bufhwm=<n> (Unix /etc/system)
Sets the upper limit of the file system buffer cache. The units for bufhwm are in kilobytes.

cpu_bringup_set=<n> (Unix /etc/system)
Specifies which processors are enabled at boot time. <n> represents a bitmap of the processors to be brought online.

disablecomponent (System Management Services)
This command can be used prior to booting the system for a 1-cpu test. The tester uses disablecomponent to add all other CPUs to the "blacklist", which is a list of components that cannot be used at boot time.

LD_LIBRARY_PATH=<directories> (linker)
LD_LIBRARY_PATH controls the search order for both the compile-time and run-time linkers. Usually, it can be defaulted; but testers may sometimes choose to explicitly set it (as documented in the notes in the submission), in order to ensure that the correct versions of libraries are picked up.

LD_PRELOAD=<shared object> (Unix environment variable)
Adds the named shared object to the runtime environment.

MADV=access_lwp and LD_PRELOAD=madv.so.1 (Unix environment variables)
When the madv.so.1 shared object is present in the LD_PRELOAD list, it is possible to provide advice to the system about how memory is likely to be accessed. The advice present in MADV applies to all processes and their descendants. A commonly used value is access_lwp, which means that when memory is allocated, the next process to touch it will be the primary user. Examples of other possible values include sequential, for memory that is used only once and then no longer needed and acces_many when many processes will be sharing data.

MPSSHEAP=<size>, MPSSSTACK=<size>, and LD_PRELOAD=mpss.so.1 (Unix environment variables)
When these variables are set, the mpss.so.1 shared object will set the preferred page size for new processes, and their descendants, to the requested sizes for the heap and stack.

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

segmap_percent=<n> (Unix /etc/system)
This value controls the size of the segmap cache as a percent of total memory. Set this value to help keep the file system cache from consuming memory unnecessarily.

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

submit=echo 'pbind -b...' > dobmk; sh dobmk (SPEC tools, Unix shell)
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:

svcadm disable webconsole (Unix, superuser commands)
Turns off the Sun Web Console, a browser-based interface that performs systems management. If it is enabled, system administrators can manage systems, devices and services from remote systems.

ts_dispatch_extended=<n> (Unix /etc/system)
Controls which dispatch table is loaded upon boot. A value of 1 loads the large system table, a value of 0 loads the regular system table.

tune_t_fsflushr=<n> (Unix /etc/system)
Controls the number of seconds between runs of the file system flush daemon, fsflush.

ulimit -s <n> (Unix shell)
Sets the stack size to n kbytes, or "unlimited" to allow the stack size to grow without limit.
Note that the "heap" and the "stack" share space; if your application allocates large amounts of memory on the heap, then you may find that the stack limit should not be set to "unlimited". A commonly used setting for SPEC CPU2006 purposes is a stack size of 128MB (131072K).

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 file that was used to format this result can be browsed at

You can also download the XML flags source by saving the following link:

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 v1.0.
Report generated on Tue Jul 22 11:27:42 2014 by SPEC CPU2006 flags formatter v6906.