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I am trying to figure out why a modified C program is running faster than its non modified counter part (I am adding very few lines of code to perform some additional work). In this context, I suspect " cache effects " to be the main explanation (instruction cache). Thus I reach the perf (https://perf.wiki.kernel.org/index.php/Main_Page) profiling tool but unfortunately I am not able to understand the meaning of its outputs regarding cache misses. Several events about cache are provided: cache-references [Hardware event] cache-misses [Hardware event] L1-dcache-loads [Hardware cache event] L1-dcache-load-misses [Hardware cache event] L1-dcache-stores [Hardware cache event] L1-dcache-store-misses [Hardware cache event] L1-dcache-prefetches [Hardware cache event] L1-dcache-prefetch-misses [Hardware cache event] L1-icache-loads [Hardware cache event] L1-icache-load-misses [Hardware cache event] L1-icache-prefetches [Hardware cache event] L1-icache-prefetch-misses [Hardware cache event] LLC-loads [Hardware cache event] LLC-load-misses [Hardware cache event] LLC-stores [Hardware cache event] LLC-store-misses [Hardware cache event] LLC-prefetches [Hardware cache event] LLC-prefetch-misses [Hardware cache event] dTLB-loads [Hardware cache event] dTLB-load-misses

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