cc-metric-collector/collectors/likwid/groups/zen2/ICACHE.txt
2021-03-25 14:47:10 +01:00

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SHORT Instruction cache miss rate/ratio
EVENTSET
FIXC1 ACTUAL_CPU_CLOCK
FIXC2 MAX_CPU_CLOCK
PMC0 RETIRED_INSTRUCTIONS
PMC1 ICACHE_FETCHES
PMC2 ICACHE_L2_REFILLS
PMC3 ICACHE_SYSTEM_REFILLS
METRICS
Runtime (RDTSC) [s] time
Runtime unhalted [s] FIXC1*inverseClock
Clock [MHz] 1.E-06*(FIXC1/FIXC2)/inverseClock
CPI FIXC1/PMC0
L1I request rate PMC1/PMC0
L1I miss rate (PMC2+PMC3)/PMC0
L1I miss ratio (PMC2+PMC3)/PMC1
LONG
Formulas:
L1I request rate = ICACHE_FETCHES / RETIRED_INSTRUCTIONS
L1I miss rate = (ICACHE_L2_REFILLS + ICACHE_SYSTEM_REFILLS)/RETIRED_INSTRUCTIONS
L1I miss ratio = (ICACHE_L2_REFILLS + ICACHE_SYSTEM_REFILLS)/ICACHE_FETCHES
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This group measures the locality of your instruction code with regard to the
L1 I-Cache.