https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873462#M3084 <P>Hi,</P> <P>Im a newbie to multi-core apps and have been studying concurrent frameworks and found the smoke framework interesting to experiment with. =)</P> <P>Has anyone tried using the smoke framework on a quad-core ? I'm using a q6600 w/o hyper threading and found out that</P> <P>on 4 threads on release build i've been getting a 5-6 fps reading for this demo.</P> <P></P> <P>I tried using the thread profiler and the profiler seems to be displaying a "Frequent use of contended synchronization was detected" .. i traced it with a view source and it was showing some overheads(yellow vertical lines) and that the threads were synchronizing too frequently.</P> <P></P> <P>If there are too may synch activities how can i optimize this so that i can limit the synching activities?</P> <P>Thanks.</P> Mon, 05 Jan 2009 14:41:44 GMT gonx 2009-01-05T14:41:44Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873462#M3084 <P>Hi,</P> <P>Im a newbie to multi-core apps and have been studying concurrent frameworks and found the smoke framework interesting to experiment with. =)</P> <P>Has anyone tried using the smoke framework on a quad-core ? I'm using a q6600 w/o hyper threading and found out that</P> <P>on 4 threads on release build i've been getting a 5-6 fps reading for this demo.</P> <P></P> <P>I tried using the thread profiler and the profiler seems to be displaying a "Frequent use of contended synchronization was detected" .. i traced it with a view source and it was showing some overheads(yellow vertical lines) and that the threads were synchronizing too frequently.</P> <P></P> <P>If there are too may synch activities how can i optimize this so that i can limit the synching activities?</P> <P>Thanks.</P> Mon, 05 Jan 2009 14:41:44 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873462#M3084 gonx 2009-01-05T14:41:44Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873463#M3085 <DIV></DIV> <EM>I've no idea on your problem.</EM><BR />Suggest you should show us your GEAR first.<BR /> Sat, 17 Jan 2009 03:12:28 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873463#M3085 yoyolyy 2009-01-17T03:12:28Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873464#M3086 <DIV style="margin:0px;"></DIV> <BR />Running the Smoke demo on my q6600, Win XP Pro x64 running Smoke as a 32-bit application, Compiled with MS C++, AMD FireStream 9170, the Release build<BR /><BR />Single Threaded ~2fps<BR />Windows Threading ~8fps<BR />TBB Threading ~12fps<BR /><BR />Your performance issue may be related to your display adapter. Note, these readings taken when flames are roaring. That seems to be one of the heavy load situations.<BR /><BR />What do you see for each threading environment (edit Smoke.gdf in the bin folder, variable TaskManager)<BR /><BR />Jim Dempsey<BR /> Sat, 17 Jan 2009 13:45:44 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873464#M3086 jimdempseyatthecove 2009-01-17T13:45:44Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873465#M3087 <DIV style="margin:0px;"> <DIV id="quote_reply" style="width: 100%; margin-top: 5px;"> <DIV style="margin-left:2px;margin-right:2px;">Quoting - <A href="https://community.intel.com/en-us/profile/99850">jimdempseyatthecove</A></DIV> <DIV style="background-color:#E5E5E5; padding:5px;border: 1px; border-style: inset;margin-left:2px;margin-right:2px;"><EM> <BR />Running the Smoke demo on my q6600, Win XP Pro x64 running Smoke as a 32-bit application, Compiled with MS C++, AMD FireStream 9170, the Release build<BR /><BR />Single Threaded ~2fps<BR />Windows Threading ~8fps<BR />TBB Threading ~12fps<BR /><BR />Your performance issue may be related to your display adapter. Note, these readings taken when flames are roaring. That seems to be one of the heavy load situations.<BR /><BR />What do you see for each threading environment (edit Smoke.gdf in the bin folder, variable TaskManager)<BR /><BR />Jim Dempsey<BR /></EM></DIV> </DIV> </DIV> <BR /> <DIV>Hi jimdempseyatthecove,</DIV> <DIV><BR /></DIV> <DIV>My system is a q6600, win xp pro 32 bit , compile it with MSVC 9 release.. solved my problem by editing the smoke.gdf and a few others by commenting the procedurefire .. =) runs faster now at 60+ fps</DIV> <DIV><BR /></DIV> <DIV>Thanks.</DIV> Sun, 18 Jan 2009 15:06:14 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Using-smoke-framework-Contended-Synch-problems/m-p/873465#M3087 gonx 2009-01-18T15:06:14Z