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List: xine-user-de
Subject: [xine.de] Since most developers want good performance with little
From: "Day Pol" <qlvk () usmma ! edu>
Date: 2007-06-16 16:59:39
Message-ID: 001001c7b037$b9e91aa0$7cda5b19 () pdasl
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In addition, OpenMP provides a number of lock routines that can be used =
for thread synchronization. dbx Debugger The Sun Studio debugger, dbx, =
is a thread-aware debugger that can help you debug your OpenMP program. =
You may specify it either as an absolute path to wherever you have =
installed the tools, or as the command name only, provided you have set =
your path to include the installation location. Each architecture has an =
ABI that defines the register order for passing parameters.
More information about the collect and analyze can be found in collect. =
In addition to the standard OpenMP environment variables, Sun Studio =
compilers provide an added set of Sun-specific environment variables =
that offer more control of the runtime environment.
In addition, the OpenMP runtime must support a query that provides the =
current parallel region ID of the calling thread, and the performance =
tool records that information in every profile packet.
When OpenMP pragmas are used in a program, they direct an OpenMP-aware =
compiler to generate an executable that will run in parallel using =
multiple threads.
This behavior is for backward compatibility reasons. c With Inline =
Assembly Code Conclusions References Introduction For demonstration =
purposes, this paper uses an academic program to generate the Mandelbrot =
set.
An example a modified script with the collect command can be found in =
the file start-collector. Those metrics are attributed to user-code by =
mapping each PC from the callstacks for the packet to functions, =
source-lines, callers and callees. Save and quit the editor.
Finally, example Sun Studio inline assembly code is used and the =
computations are timed again and compared with the previous timings. =
Performance Analyzer Identify bottlenecks in your program by using the =
Sun Studio Performance Analyzer. As long as interfaces are clearly =
defined and strictly follow typing rules, it works well. In summary, Sun =
Studio compilers and tools support OpenMP natively and have many useful =
features that can help you parallelize your program.
You will also need a supported version of Java installed.
Save and quit the editor. In our example, we name it start-collector. Be =
sure to maintain timings of your serial run, so that you can decide if =
parallelization is useful.
Parallel Programming in OpenMP by Rohit Chandra and others is a good =
introduction, and is published by Morgan Kaufmann. The mechanism used =
above for the fork event can simply be used to provide other events. For =
clock-profiling, the metrics include Total-time, User-CPU-Time, =
System-CPU-Time, and a number of others.
c With -fast One of the easiest ways a developer can get faster =
performance is to use the -fast flag in the Sun Studio compilers.
With some tinkering, it would be possible to match the performance in =
-fast with inline assembly code.
It is beneficial to insert the pragma at the outermost loop, since this =
gives the most performance gain.
The tools derives OpenMP metrics from these streams, and synthesizes the =
user-model callstack from the implementation model data in the streams. =
Sun HPC ClusterTools software offers a comprehensive set of capabilities =
for parallel computing. working on enterprise deployment architectures, =
virtualization and system performance for customers of IBM WebSphere =
products on Sun Solaris platform.
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<DIV><FONT face=Arial size=2><IMG alt="motivation" hspace=0
src="cid:000b01c7b037$b9de6c40$7cda5b19@pdasl" align=baseline
border=0></FONT></DIV>
<DIV><FONT face=Arial size=2>In addition, OpenMP provides a number of lock
routines that can be used for thread synchronization. dbx Debugger The Sun Studio
debugger, dbx, is a thread-aware debugger that can help you debug your OpenMP
program. You may specify it either as an absolute path to wherever you have
installed the tools, or as the command name only, provided you have set your path to
include the installation location. Each architecture has an ABI that defines the
register order for passing parameters.</FONT></DIV>
<DIV><FONT face=Arial size=2>More information about the collect and analyze can
be found in collect. In addition to the standard OpenMP environment variables, Sun
Studio compilers provide an added set of Sun-specific environment variables that
offer more control of the runtime environment.</FONT></DIV>
<DIV><FONT face=Arial size=2>In addition, the OpenMP runtime must support a
query that provides the current parallel region ID of the calling thread, and the
performance tool records that information in every profile packet.</FONT></DIV>
<DIV><FONT face=Arial size=2>When OpenMP pragmas are used in a program, they
direct an OpenMP-aware compiler to generate an executable that will run in parallel
using multiple threads.</FONT></DIV>
<DIV><FONT face=Arial size=2>This behavior is for backward compatibility
reasons. c With Inline Assembly Code Conclusions References Introduction For
demonstration purposes, this paper uses an academic program to generate the
Mandelbrot set.</FONT></DIV>
<DIV><FONT face=Arial size=2>An example a modified script with the collect
command can be found in the file start-collector. Those metrics are attributed to
user-code by mapping each PC from the callstacks for the packet to functions,
source-lines, callers and callees. Save and quit the editor.</FONT></DIV>
<DIV><FONT face=Arial size=2>Finally, example Sun Studio inline assembly code is
used and the computations are timed again and compared with the previous timings.
Performance Analyzer Identify bottlenecks in your program by using the Sun Studio
Performance Analyzer. As long as interfaces are clearly defined and strictly follow
typing rules, it works well. In summary, Sun Studio compilers and tools support
OpenMP natively and have many useful features that can help you parallelize your
program.</FONT></DIV>
<DIV><FONT face=Arial size=2>You will also need a supported version of Java
installed.</FONT></DIV>
<DIV><FONT face=Arial size=2>Save and quit the editor. In our example, we name
it start-collector. Be sure to maintain timings of your serial run, so that you can
decide if parallelization is useful.</FONT></DIV>
<DIV><FONT face=Arial size=2>Parallel Programming in OpenMP by Rohit Chandra and
others is a good introduction, and is published by Morgan Kaufmann. The mechanism
used above for the fork event can simply be used to provide other events. For
clock-profiling, the metrics include Total-time, User-CPU-Time, System-CPU-Time, and
a number of others.</FONT></DIV>
<DIV><FONT face=Arial size=2>c With -fast One of the easiest ways a developer
can get faster performance is to use the -fast flag in the Sun Studio
compilers.</FONT></DIV>
<DIV><FONT face=Arial size=2>With some tinkering, it would be possible to match
the performance in -fast with inline assembly code.</FONT></DIV>
<DIV><FONT face=Arial size=2>It is beneficial to insert the pragma at the
outermost loop, since this gives the most performance gain.</FONT></DIV>
<DIV><FONT face=Arial size=2>The tools derives OpenMP metrics from these
streams, and synthesizes the user-model callstack from the implementation model data
in the streams. Sun HPC ClusterTools software offers a comprehensive set of
capabilities for parallel computing. working on enterprise deployment architectures,
virtualization and system performance for customers of IBM WebSphere products on Sun
Solaris platform.</FONT></DIV></BODY></HTML>
["abruptness.gif" (image/gif)]
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