Perf

• CPU
  • top
  • htop
• 网络 IO
  • iftop
• 存储 IO
  • iotop
  • iostat
• Linux kernel profiling with perf
• simplest tool to measure C program cache hit/miss and cpu time

perf

perf record -g -a sleep 10
perf report

perf stat -B dd if=/dev/zero of=/dev/null count=1000000