https://community.intel.com/t5/Analyzers/Measuring-data-movement-instructions/m-p/993663#M11575 Hi,<BR /><BR />I am currently measuring a database that is being benchmarked, and i use all instruction(x87,64 mmx, 128 mmx, packed single precision,...) events and ratio's.<BR />The weird thing was that i don't get to 100% of instructions if i sum up the ratio's which have a formula like:<BR />'(instructions of the specific kind/instructions retired)*100'.<BR />If i look at the defenition of 'instructions of the specific kind', for instance '128-bit MMX Instructions Retired' it says it doesn not include the .. data movement instructions, in this case the 128-bit SIMD data movement instructions.<BR />Is there an event or ratio which can measure data movement instructions somehow?<BR /><BR />Also the formula for 'Branch Mispredict Performance Impact' is:<BR />'((Mispredicted Branches Retired * 20) / Clockticks)*100'.<BR />Is the '20' in the formula the length of the pipeline?<BR /><BR />Thx Tue, 22 Mar 2005 16:51:44 GMT Intel_C_Intel 2005-03-22T16:51:44Z https://community.intel.com/t5/Analyzers/Measuring-data-movement-instructions/m-p/993663#M11575 Hi,<BR /><BR />I am currently measuring a database that is being benchmarked, and i use all instruction(x87,64 mmx, 128 mmx, packed single precision,...) events and ratio's.<BR />The weird thing was that i don't get to 100% of instructions if i sum up the ratio's which have a formula like:<BR />'(instructions of the specific kind/instructions retired)*100'.<BR />If i look at the defenition of 'instructions of the specific kind', for instance '128-bit MMX Instructions Retired' it says it doesn not include the .. data movement instructions, in this case the 128-bit SIMD data movement instructions.<BR />Is there an event or ratio which can measure data movement instructions somehow?<BR /><BR />Also the formula for 'Branch Mispredict Performance Impact' is:<BR />'((Mispredicted Branches Retired * 20) / Clockticks)*100'.<BR />Is the '20' in the formula the length of the pipeline?<BR /><BR />Thx Tue, 22 Mar 2005 16:51:44 GMT https://community.intel.com/t5/Analyzers/Measuring-data-movement-instructions/m-p/993663#M11575 Intel_C_Intel 2005-03-22T16:51:44Z