PROBLEM:  (HPAQ81B6C)    (Patch ID: OSF425-531)
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Multithreaded applications can experience performance problems if they
are run on multiCPU systems and make heavy use of any of the functions
on the malloc(3) manpage (including C++ applications making heavy use
of "new" and "delete").  On profiling these applications, they will be
seen to be spending a large percentage of their CPU time in two
pthreads functions (pthread_mutex_block and pthread_mutex_unblock)
which are called from the malloc family of functions.
The problem becomes worse under the following conditions: the
number of threads increases, the number of CPUs increases, or more
calls are made to the malloc functions.