About instructions

[krscent]

Hi,

I'm running a program in 2 different platform which have same instruction set(Atom and Xeon)

As my prediction, regardless of branches, it should have same instruction count but in my result

the value of "INST_RETIRED.ANY - BR_INST_RETIRED.ANY" is not equal and the difference is over 10% which I thought it's not under the error tolerance.

Therefore, is there any event I didn't considered but I should?

THX!

[Peter_W_Intel]

Hi,

Please consider below factors in cross platforms:
1. Source file is same, but execution binaries may not be same.
2. Execution paths are same? (same test case?)
3. If binaries are same for Intel Atomprocessorand Intel Xeon processor, use amplxe-cl to test
a) amplxe-cl -collect lightweight-hotspots -r r001lh -- app
b) amplxe-cl -report pmu-events -r r001lh/ -filter module=app

Will you get same event counts for INST_RETIRED.ANY for app?

Regards, Peter