Hi Robert,
the overall application is a pretty big system for rendering of massive 3D city
models. We are creating several threads on our own, e.g. for service request,
fetching of texture tiles etc. The viewer itself is not operating in a threaded
mode. Some threads are also database pager threads created by OSG.
The version of OSG is the one tagged as 3.3.0 in the github repository. For me
it seems like the following code from PThread.cpp causes the cpu affinity mask
of the complete process to be set to CPU zero. After i found this piece of
code, i switched openthreads to use QT threads. After recompilation, the cpu
affinity of all process threads was set correctly to use all processors.
Code:
if (pd->cpunum>=0)
{
#if defined(__sgi)
pthread_setrunon_np( pd->cpunum );
#elif defined(HAVE_PTHREAD_SETAFFINITY_NP) ||
defined(HAVE_THREE_PARAM_SCHED_SETAFFINITY) ||
defined(HAVE_TWO_PARAM_SCHED_SETAFFINITY)
cpu_set_t cpumask;
CPU_ZERO( &cpumask );
CPU_SET( pd->cpunum, &cpumask );
#if defined(HAVE_PTHREAD_SETAFFINITY_NP)
pthread_setaffinity_np( pthread_self(), sizeof(cpumask), &cpumask);
#elif defined(HAVE_THREE_PARAM_SCHED_SETAFFINITY)
sched_setaffinity( 0, sizeof(cpumask), &cpumask );
#elif defined(HAVE_TWO_PARAM_SCHED_SETAFFINITY)
sched_setaffinity( 0, &cpumask );
#endif
#endif
}
Kind regards,
Jan
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=57630#57630
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