simplest tool to measure C program cache hit/miss and cpu time in linux?
Use perf: perf stat ./yourapp See the kernel wiki perf tutorial for details. This uses the hardware performance counters of your CPU, so the overhead is very small. Example from the wiki: perf stat -B dd if=/dev/zero of=/dev/null count=1000000 Performance counter stats for ‘dd if=/dev/zero of=/dev/null count=1000000’: 5,099 cache-misses # 0.005 M/sec (scaled from 66.58%) … Read more