我刚刚升级到Ubuntu 16.04 LTS。在我的C ++应用程序中，我使用PAPI库，所以我从http://icl.utk.edu/papi/安装了它。但是由于某种原因，我无法再运行我的应用程序而无需在开头键入sudo。
即使只是在终端上键入papi_avail以查看哪些计数器可用，我也会得到：
================================================================================
PAPI Preset Events
================================================================================
Name Code Avail Deriv Description (Note)
PAPI_L1_DCM 0x80000000 No No Level 1 data cache misses
PAPI_L1_ICM 0x80000001 No No Level 1 instruction cache misses
PAPI_L2_DCM 0x80000002 No No Level 2 data cache misses
PAPI_L2_ICM 0x80000003 No No Level 2 instruction cache misses
..........
Of 108 possible events, 0 are available, of which 0 are derived.
avail.c PASSED
如果我运行sudo papi_avail我就明白了：
--------------------------------------------------------------------------------
Of 108 possible events, 50 are available, of which 17 are derived.
avail.c PASSED
Ubuntu 16.04有什么变化？