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Tue, 26 Jun 2007 14:27:01 +0200 |
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If the packet is not within a parallel region, no further processing is
needed; if it is, the next step is to determine where that parallel
region is calling back into user code.
When using compilers that are not OpenMP-aware, the OpenMP pragmas are
silently ignored. There are two main technologies used for performance
measurement on OpenMP programs: tracing and statistical profiling. To
solve the second challenge, the OpenMP runtime must maintain a state for
each thread and must support a query that returns the current state of
the calling thread. Rendezvous is achieved actively by the collector,
and passively by the OpenMP runtime.
The description here is somewhat schematic; the precise implementation
specification for the API is given in the accompanying include file. If
supported, it could request events for all possible events in the life
of the process and record those events with their thread ID and
timestamps.
OpenMP Support in Sun Studio Compilers and Tools Rate and Review Tell us
what you think of the content of this page. , analyzing, optimizing the
performance and helping customers of WebSphere family of products on Sun
Solaris platform.
IMPORTANT NOTE: Do not rely on the particular initial values that the
compiler currently uses, as they are subject to change.
It then proceeds on to the next sequence of code, etc. Includes examples
and commentary. Includes examples and commentary.
When a routine contains a loop, the program executes the code inside the
loop repeatedly, until the loop exit criterion is reached.
This manual contains information specific to the Sun Studio
implementation. Conversely, if -fast does not make significant
improvements, exploring inline assembly code is the better option.
And in most cases, the engineer who is responsible for debugging or
increasing the performance of the application is not the original
software designer or developer. To force it to collect data in
particular directory you may want to use "-d" option in the script where
-d directory specifies the experiment directory. Prior to joining Sun,
Albert worked on various software development contracts at NASA Johnson
Space Center.
Excellent Good Fair Poor Comments: If you would like a reply to
your comment, please submit your email address: Note: We may not respond
to all submitted comments.
OpenMP Runtime Routines OpenMP provides a number of runtime routines can
be used to obtain information about threads in the program. ASSUME
pragmas are described in detail in the Fortran User's Guide. Interested
in learning about new releases?
You will also need a supported version of Java installed.
Rate and Review Tell us what you think of the content of this page. In
practice, it's not quite a silver bullet.
Before further processing the performance data, the record of fork
events is processed, and a table giving the parallel-region ID and
master-callstack-preface is constructed.
OpenMP Runtime Routines OpenMP provides a number of runtime routines can
be used to obtain information about threads in the program.
The number of threads in the team executing a parallel region can be
controlled in several ways. Finally, in the last section, we provide the
web links to the IBM WebSphere documentation.
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