USER_READ_ENABLED
old_user_read = (buf[0] == '1') ? USER_READ_ENABLED : USER_READ_DISABLED;
buf[0] = (enabled == USER_READ_ENABLED) ? '1' : '0';
rdpmc_supported = (enabled == USER_READ_ENABLED);
return test_stat_user_read(PERF_COUNT_HW_INSTRUCTIONS, USER_READ_ENABLED);
return test_stat_user_read(PERF_COUNT_HW_CPU_CYCLES, USER_READ_ENABLED);