I have run the following command on T4240 board.
#perf stat ls
Performance counter stats for 'ls':
2.712256 task-clock # 0.744 CPUs utilized
1 context-switches # 0.369 K/sec
0 cpu-migrations # 0.000 K/sec
241 page-faults # 0.089 M/sec
0 cycles # 0.000 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
0 instructions # 0.00 insns per cycle
0 branches # 0.000 K/sec
0 branch-misses # 0.00% of all branches
0.003646108 seconds time elapsed
Would like to know how perf measure instruction,branches and branch-misses,why 0 for all these three fields?
Which particular registers perf reads to know about count of instruction,branches and branch-misses?