我知道“perf”工具需要安装对应于特定的Linux内核版本.而且我知道所有的docker镜像都使用相同的Linux内核版本,无论Linux发行版本如何.

我在docker中使用ubuntu 16.04并且已经安装了linux-tools-common,启动perf告诉我我还缺少一些包：’

# perf
/usr/bin/perf: line 32: lsb_release: command not found
WARNING: perf not found for kernel 4.9.12

  You may need to install the following packages for this specific kernel:
    linux-tools-4.9.12-moby
    linux-cloud-tools-4.9.12-moby

  You may also want to install one of the following packages to keep up to date:
    linux-tools-moby
    linux-cloud-tools-moby

然后我试着安装我错过的东西：

root@xxxxxx:/# apt-get install linux-tools-4.9.12-moby linux-cloud-tools-4.9.12-moby
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-tools-4.9.12-moby
E: Couldn't find any package by glob 'linux-tools-4.9.12-moby'
E: Couldn't find any package by regex 'linux-tools-4.9.12-moby'
E: Unable to locate package linux-cloud-tools-4.9.12-moby
E: Couldn't find any package by glob 'linux-cloud-tools-4.9.12-moby'
E: Couldn't find any package by regex 'linux-cloud-tools-4.9.12-moby'
root@b2543b6e985d:/# apt-get install linux-tools-moby linux-cloud-tools-moby
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-tools-moby
E: Unable to locate package linux-cloud-tools-moby

(1)太奇怪了,但是如何解决这个安装问题呢？

(2)另外：我仍然感到困惑,如果“perf”和“kernel”之间没有严格匹配,那么“perf”如何在linux的docker中运行良好？

解决方法:

I knew that “perf” tool requires installation correspond to specific linux kernel versions. And I knew that all docker images run with the same linux kernel version, no matter linux distribution version.

仍然可以使用来自其他版本内核的Perf工具(perf_event子系统中的系统调用具有良好的设计并且与旧/新工具兼容).所以,你可以在任何地方找到任何perf二进制文件(不是/usr/bin/perf脚本),检查它的库依赖于(ldd ..path_to_perf / perf)并在Docker中复制perf(并安装libs).

在docker中可能会限制硬件事件,系统范围或内核分析的使用,所以请尝试

> perf -e cycles：u ./program(仅用于用户空间的硬件计数器),
> perf -e task-clock ./program(内核和用户空间的软件定时器),
> perf -e task-clock：u ./program(仅限用户空间的软件定时器),