Hi Ralph,
if you can make a small OT vs OpenMP test app that people can run on a
variety of Linux flavours, maybe something will jump out. E.g. how
standard is the pthread lib in RHEL5.2?
jp
Ralph R. Peters wrote:
Hi Robert all,
I did the simple thing to test if the call
Hi,
I will try to be much more concise! :-)
The problem appears to be that
SetProcessorAffinityOfCurrentThread(unsigned int cpunum) is always being
called with a cpunum value of zero. More information follows.
I am trying to use OpenMP with an application that uses OpenScenGraph.
Hi Ralf,
SetProcessorAffinityOfCurrentThread(0) is just setting the affinity of
thread to cpu number 0, this is a perfectly normal reasonable setting,
it in itself is nothing to worry about, the main rendering thread
being assigned to cpu number 0 is exactly what you want for most apps.
What the
Hi Ralf,
As a sanity test I've just added some debug code into
src/osgViewer/ViewerBase.cpp and src/OpenThreads/pthreads/PThead.c++
to track what cpu numbers as being assigned from the viewer, and what
is being recieved by OpenThreads, running osgwindow cow.osg I get:
numProcessors = 4
cpunum=1
On Wed, Oct 15, 2008 at 5:46 PM, Robert Osfield
[EMAIL PROTECTED] wrote:
numProcessors = 4
cpunum=1
cpunum=2
cpunum=3
cpunum=0
running and setting thread 0x737238 for cpunum=3
running and setting thread 0x737638 for cpunum=0
running and setting thread 0x734bf8 for cpunum=1
running and
Hi Csaba,
On Wed, Oct 15, 2008 at 5:07 PM, Csaba Halász [EMAIL PROTECTED] wrote:
So all looks correct in terms of num of processors and cpu number
assigned for affinity.
I wonder why OSG assigns threads to cpus by itself and not rely on the
operating system.
Because a OS will let that
On Wed, Oct 15, 2008 at 6:15 PM, Robert Osfield
[EMAIL PROTECTED] wrote:
Hi Csaba,
On Wed, Oct 15, 2008 at 5:07 PM, Csaba Halász [EMAIL PROTECTED] wrote:
So all looks correct in terms of num of processors and cpu number
assigned for affinity.
I wonder why OSG assigns threads to cpus by
Hi Robert,
Would you please send me your modified code and we can run the same code!
Ralph
{snip
Hi Ralf,
As a sanity test I've just added some debug code into
src/osgViewer/ViewerBase.cpp and src/OpenThreads/pthreads/PThead.c++
to track what cpu numbers as being assigned from the viewer,
On Wed, Oct 15, 2008 at 6:47 PM, Robert Osfield
[EMAIL PROTECTED] wrote:
On Wed, Oct 15, 2008 at 5:30 PM, Csaba Halász [EMAIL PROTECTED] wrote:
As a related question, in the stats display if multiple cpus are used
properly, should that manifest itself as overlapping bars? Because I
don't see
On Wed, Oct 15, 2008 at 5:58 PM, Ralph R. Peters [EMAIL PROTECTED] wrote:
Would you please send me your modified code and we can run the same code!
I already did, please trace back through the thread.
Robert.
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osg-users mailing list
On Wed, Oct 15, 2008 at 7:07 PM, Robert Osfield
[EMAIL PROTECTED] wrote:
On Wed, Oct 15, 2008 at 6:01 PM, Csaba Halász [EMAIL PROTECTED] wrote:
Here is what stats I get: http://imagebin.ca/view/lDtnJ9ET.html
I have tried your debugging mods, with the osgcamera example I get the
expected
Hi Csaba,
On Wed, Oct 15, 2008 at 5:30 PM, Csaba Halász [EMAIL PROTECTED] wrote:
But if OSG happens to force 2 cpu intensive threads to the same core,
performance will suffer anyway, and more than a simple cache
efficiency issue.
I have 3 cameras, two of which are using the same graph and a
On Wed, Oct 15, 2008 at 6:45 PM, Csaba Halász [EMAIL PROTECTED] wrote:
On Wed, Oct 15, 2008 at 7:23 PM, Csaba Halász [EMAIL PROTECTED] wrote:
The threading is set like so:
viewer = new osgViewer::Viewer;
viewer-setThreadingModel(osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext);
On Wed, Oct 15, 2008 at 8:28 PM, Robert Osfield
[EMAIL PROTECTED] wrote:
On Wed, Oct 15, 2008 at 6:45 PM, Csaba Halász [EMAIL PROTECTED] wrote:
On Wed, Oct 15, 2008 at 7:23 PM, Csaba Halász [EMAIL PROTECTED] wrote:
The threading is set like so:
viewer = new osgViewer::Viewer;
Hi Robert all,
I did the simple thing to test if the call pthread_setaffinity_np(
pthread_self(), sizeof(cpumask), cpumask) was causing OpenMP problems.
A code snippet from the function SetProcessorAffinityOfCurrentThread in
PThread.c++ follows. Changing doit from true to false and
Hi Ralf,
I'm afraid there isn't anything more I can do to help you, as I have
absolutely no experience with OpenMP, and am not an expert on the
pthread affinity functions. Perhaps others on the list might be able
to help.
What it does look like is that pthread_setaffinity_np/OpenMP
On Wed, Oct 15, 2008 at 8:44 PM, Csaba Halász [EMAIL PROTECTED] wrote:
On Wed, Oct 15, 2008 at 8:28 PM, Robert Osfield
[EMAIL PROTECTED] wrote:
This sounds like a bug in osgViewer, it shouldn't matter which order
your set the threading model.
Hmm, upon closer look Viewer::realize() does
HI Ralf,
On Tue, Oct 14, 2008 at 6:21 PM, Ralph R. Peters [EMAIL PROTECTED] wrote:
Hi Robert,
I get an email digest and so I have been responding directly with
thunderbird. What should I put in the subject line so that I maintain the
thread? Is what I put above sufficient? Please tell me
HI Ralf,
Could you please keep your posts on the same thread so it makes it
possible for others to follow, there are a great many posts that get
posted on osg-users and unless you keep to the thread basically it
becomes unmanageable for us to follow things.
And when you say Hi... and he
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