cc-metric-collector/collectors/likwid/groups/interlagos/FPU_EXCEPTION.txt

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2021-03-25 14:47:10 +01:00
SHORT Floating point exceptions
EVENTSET
PMC0 RETIRED_INSTRUCTIONS
PMC1 RETIRED_FP_INSTRUCTIONS_ALL
PMC2 FPU_EXCEPTION_ALL
METRICS
Runtime (RDTSC) [s] time
Overall FP exception rate PMC2/PMC0
FP exception rate PMC2/PMC1
LONG
Formulas:
Overall FP exception rate = FPU_EXCEPTIONS_ALL / INSTRUCTIONS_RETIRED
FP exception rate = FPU_EXCEPTIONS_ALL / FP_INSTRUCTIONS_RETIRED_ALL
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Floating point exceptions occur e.g. on the treatment of denormal numbers.
There might be a large penalty if there are too many floating point
exceptions.