Trying to run eBPF BCC Tools offcputime fails with error

Question

$ /usr/share/bcc/tools/offcputime

The above command says it can't find this directory: /lib/modules/4.9.0-040900rc2-generic/kernel/build.

I think it has something to do with not having the linux-tools for this kernel.

Can't install linux tools for latest kernel.

 E: Unable to locate package linux-tools-4.9.0-040900rc2-generic

Or maybe I installed it wrong with dpkg... Got the .deb files here: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc2/

Answer 1

BCC needs the kernel headers to compile its eBPF programs. So you'll also need to download and install the .deb files for kernel headers.

(I was able to reproduce your bug and fix by installing the 2 .deb files from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9-rc2/ for kernel headers.)