https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Measuring-QPI-bandwidth/m-p/779853#M234 <DIV id="_mcePaste">I am measuring a number of things using performance counters.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">However, I am unsure how to useUNC_QHL_REQUESTS requests.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">Basically, I send network traffic with a 10Gbps card at 10Gbps and I would like to measure something like 10Gbps on the QPI link.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">I consider the counter is counting QPI flits (80bits). when I send 800Mbps on the network, I measure 800Mbps on the QPI link (I unse UNCORE counters starting at 0x3B0).</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">When I send 10Gbps, I measure 3Gbps, as if it was counting for only one QPI Home Agent. I checked for overflows of the counters and nothing seems bad there. I tried to modify CMASK just in case it was telling for which Home Agent the counter works but if I change CMASK I allways get 0 in the counter.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste"></DIV>does anybody have an idea how to get this done ? Fri, 18 Mar 2011 16:18:08 GMT ff 2011-03-18T16:18:08Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Measuring-QPI-bandwidth/m-p/779853#M234 <DIV id="_mcePaste">I am measuring a number of things using performance counters.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">However, I am unsure how to useUNC_QHL_REQUESTS requests.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">Basically, I send network traffic with a 10Gbps card at 10Gbps and I would like to measure something like 10Gbps on the QPI link.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">I consider the counter is counting QPI flits (80bits). when I send 800Mbps on the network, I measure 800Mbps on the QPI link (I unse UNCORE counters starting at 0x3B0).</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste">When I send 10Gbps, I measure 3Gbps, as if it was counting for only one QPI Home Agent. I checked for overflows of the counters and nothing seems bad there. I tried to modify CMASK just in case it was telling for which Home Agent the counter works but if I change CMASK I allways get 0 in the counter.</DIV><DIV id="_mcePaste"></DIV><DIV id="_mcePaste"></DIV>does anybody have an idea how to get this done ? Fri, 18 Mar 2011 16:18:08 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Measuring-QPI-bandwidth/m-p/779853#M234 ff 2011-03-18T16:18:08Z