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IBM System zEC12 events

This is a list of all System zEC12 CPU's performance counter event types. Please see the "The Load-Program-Parameter and CPU-Measurement Facilities" document at

NameDescriptionCounters usableUnit mask options
CPU_CYCLES Processor cycles all
INSTRUCTIONS Instructions completed all
Bottlenecks occur in surprising places, so don't try to second guess and put in a speed hack until you've proven that's where the bottleneck is. - Rob Pike