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Full Discussion: pthread performance question
Operating Systems AIX pthread performance question Post 302110049 by ldarden on Friday 9th of March 2007 03:32:51 PM
Old 03-09-2007
pthread performance question

Running dedicated on AIX with 4 processors, creating 4 threads, each with equal work to do, only runs about 20% faster than 1 thread with all of the work. Test case has no blocking but does share memory for read access only.

Any ideas why I'm only seeing 20% gain? Is this typical on AIX? Anything I can do to improve system?
 

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Portable Threads Abstraction Classes(3)                                Coin                                Portable Threads Abstraction Classes(3)

NAME
Portable Threads Abstraction Classes - Classes class SbBarrier The SbBarrier class implements the 'barrier' multi-thread synchronization technique. A barrier is a synchronization mechanism that is used for blocking threads as they enter the barrier until a given number of threads are blocked, at which point all the threads are released again. " class SbCondVar A class for synchronizing access to global variables. Condition variables are used to protect global variables in an environment where multiple threads are running concurrently. " class SbFifo A class for managing a pointer first-in, first-out queue. class SbMutex A basic class for managing a mutex. This class provides a portable framework around the mutex interface of the underlying native thread-handling toolkit. " class SbThreadAutoLock Simple convenience class for locking access to a function. This class provides a simple convenience mechanism for automatically locking access to a function that is not re-entrant. " class SbRWMutex class SbStorage The SbStorage class manages thread-local memory. This class manages thread-local memory. When different threads access the memory an SbStorage object manages, they will receive different memory blocks back. " class SbTypedStorage< Type > The SbTypedStorage class manages generic thread-local memory. This class manages thread-local memory. When different threads access the memory an SbTypedStorage object manages, they will receive different memory blocks back. " class SbThread A class for managing threads. This class provides a portable framework around the tasks of instantiating, starting, stopping and joining threads. " Detailed Description Coin implements a set of abstractions over the native threads data types that can be portably used across all the platforms Coin has been ported to. Author Generated automatically by Doxygen for Coin from the source code. Version 3.1.3 Wed May 23 2012 Portable Threads Abstraction Classes(3)
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