Kernel papi#U avail显示事件'；s、 can'；C语言中的t访问

我试图在Odroid-XU4上运行PAPI，我已经安装了PAPI，当我运行

PAPI\u avail-a

时，我可以看到16个可用事件

我已经将perf_event_paranoid设置为-1

当我尝试使用C调用PAPI时，它总是说：

事件不存在

尽管我知道硬件有16个事件

当我运行PAPI的测试时，我看到以下错误：

Couldn't open hw_instructions in exclude_guest = 0

有人知道这个错误是什么意思吗？我怎样才能修复它使PAPI正常工作

编辑

我已经包括了

papi\u component\u avail

和

papi\u avail-a

的输出，以防有帮助

papi组件的可用性

odroid@odroid:~/Desktop$ papi_component_avail
Available components and hardware information.
--------------------------------------------------------------------------------
PAPI version             : 5.7.1.0
Operating system         : Linux 3.10.105-141
Vendor string and code   : ARM (7, 0x7)
Model string and code    : ARMv7 Processor rev 3 (v7l) (3, 0x3)
CPU revision             : 3.000000
CPUID                    : Family/Model/Stepping 7/3079/0, 0x07/0xc07/0x00
CPU Max MHz              : 1400
CPU Min MHz              : 200
Total cores              : 8
SMT threads per core     : 1
Cores per socket         : 4
Sockets                  : 2
Cores per NUMA region    : 8
NUMA regions             : 0
Running in a VM          : no
Number Hardware Counters : 3
Max Multiplex Counters   : 384
Fast counter read (rdpmc): no
--------------------------------------------------------------------------------

Compiled-in components:
Name:   perf_event              Linux perf_event CPU counters
Name:   perf_event_uncore       Linux perf_event CPU uncore and northbridge
   \-> Disabled: No uncore PMUs or events found

Active components:
Name:   perf_event              Linux perf_event CPU counters
                                Native: 122, Preset: 16, Counters: 3
                                PMUs supported: perf, perf_raw, arm_ac7


--------------------------------------------------------------------------------

papi\u avail-a

================================================================================
PAPI Preset Events
================================================================================
        Name        Code    Deriv Description (Note)
    PAPI_L1_DCM  0x80000000  No   Level 1 data cache misses
    PAPI_L1_ICM  0x80000001  No   Level 1 instruction cache misses
    PAPI_L2_DCM  0x80000002  No   Level 2 data cache misses
    PAPI_L2_TCM  0x80000007  No   Level 2 cache misses
    PAPI_TLB_DM  0x80000014  No   Data translation lookaside buffer misses
    PAPI_TLB_IM  0x80000015  No   Instruction translation lookaside buffer misses
    PAPI_HW_INT  0x80000029  No   Hardware interrupts
    PAPI_BR_MSP  0x8000002e  No   Conditional branch instructions mispredicted
    PAPI_TOT_INS 0x80000032  No   Instructions completed
    PAPI_LD_INS  0x80000035  No   Load instructions
    PAPI_SR_INS  0x80000036  No   Store instructions
    PAPI_BR_INS  0x80000037  No   Branch instructions
    PAPI_TOT_CYC 0x8000003b  No   Total cycles
    PAPI_L1_DCA  0x80000040  No   Level 1 data cache accesses
    PAPI_L2_DCA  0x80000041  No   Level 2 data cache accesses
    PAPI_L1_ICA  0x8000004c  No   Level 1 instruction cache accesses
    --------------------------------------------------------------------------------
    Of 16 available events, 0 are derived.

尝试安装性能时的输出

odroid@odroid:~/Desktop$ perf stat
WARNING: perf not found for kernel 3.10.105

  You may need to install the following packages for this specific kernel:
    linux-tools-3.10.105

  You may also want to install one of the following packages to keep up to date:
    linux-tools
odroid@odroid:~/Desktop$ sudo apt install linux-tools-3.10.105
[sudo] password for odroid: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package linux-tools-3.10.105
E: Couldn't find any package by glob 'linux-tools-3.10.105'
E: Couldn't find any package by regex 'linux-tools-3.10.105'
odroid@odroid:~/Desktop$

---

您是否在不通过硬件事件的VM中运行此功能？像

page\u faults

这样的软件事件仍然可用。

perf stat

有效吗？@PeterCordes它没有在虚拟机中运行，它没有安装perf，我已经包含了papi\u组件的输出，papi\u avail-a，以及当我尝试安装

perf

时会发生什么。我在另一台装有x86_64 CPU的机器上安装了PAPI，这台机器也没有性能，但PAPI在这台机器上工作。谢谢您的帮助。@Francis，您应该以linux tools deb包的形式找到适用于arm32（任何版本）的任何debian或ubuntu内核，并将其解压缩（不安装，只需解压缩

dpkg deb-x

），然后您将拥有perf tool binary。它可以使用

perf list

列出一些可用的硬件事件。同时检查dmesg的输出，了解PMU事件信息<测试的code>strace可能有助于获取系统调用错误代码。