我正在两台几乎相同的机器上测试 oprofile 版本 1.0.0。一方面它可以完美运行，另一方面它根本不收集任何数据。Oprofile 作为源代码下载并编译并安装在每个盒子上 - 所有库/编译器等的版本相同
作为 root 我正在运行并使用推荐的 CTRL-c 退出
operf --system-wide
两个盒子上的内核都是
2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
CPU 有所不同 - 这是工作 operf box
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU 5160 @ 3.00GHz
stepping : 6
cpu MHz : 2992.426
这是非工作框
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.80GHz
stepping : 10
cpu MHz : 3790.625
即使第二个 CPU 不支持硬件分析（不确定要查找哪些标志），也有办法让它工作 - 这提到OPROFILE 无法使用计时器模式获取性能数据，但 opcontrol 在 1.0 版中消失了
工作 operf.log 文件结果
Profiling started at Mon Oct 6 14:22:33 2014
Profiling stopped at Mon Oct 6 14:23:56 2014
-- OProfile/operf Statistics --
Nr. non-backtrace samples: 1264859
Nr. kernel samples: 628924
Nr. user space samples: 635935
Nr. samples lost due to sample address not in expected range for domain: 0
Nr. lost kernel samples: 0
Nr. samples lost due to sample file open failure: 0
Nr. samples lost due to no permanent mapping: 682
Nr. user context kernel samples lost due to no app info available: 0
Nr. user samples lost due to no app info available: 0
Nr. backtraces skipped due to no file mapping: 0
Nr. hypervisor samples dropped due to address out-of-range: 0
Nr. samples lost reported by perf_events kernel: 0
非工作 operf.log 文件结果
Profiling started at Tue Oct 7 11:44:38 2014
Profiling stopped at Tue Oct 7 11:45:34 2014
-- OProfile/operf Statistics --
Nr. non-backtrace samples: 0
Nr. kernel samples: 0
Nr. user space samples: 0
Nr. samples lost due to sample address not in expected range for domain: 0
Nr. lost kernel samples: 0
Nr. samples lost due to sample file open failure: 0
Nr. samples lost due to no permanent mapping: 0
Nr. user context kernel samples lost due to no app info available: 0
Nr. user samples lost due to no app info available: 0
Nr. backtraces skipped due to no file mapping: 0
Nr. hypervisor samples dropped due to address out-of-range: 0
Nr. samples lost reported by perf_events kernel: 0