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perf: Performance Counters, cont. • Linux Performance Analysis and Tools

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perf: Performance Counters, cont. • Can choose different counters: $ perf list | grep Hardware cpu-cycles OR cycles [Hardware event] stalled-cycles-frontend OR idle-cycles-frontend [Hardware event] stalled-cycles-backend OR idle-cycles-backend [Hardware event] instructions [Hardware event] cache-references [Hardware event] [...] $ perf stat -e instructions,cycles,L1-dcache-load-misses,LLC-load- misses,dTLB-load-misses gzip file1 Performance counter stats for gzip file1: 12278136571 instructions # 2.199 IPC 5582247352 cycles 90367344 L1-dcache-load-misses 1227085 LLC-load-misses 685149 dTLB-load-misses 2.332492555 seconds time elapsed • Supports additional custom counters (in hex or a desc) for whatever the processor supports. Examine bus events.Sunday, February 24, 13

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