linux-kernel - Re: [PATCH v2 00/11] perf/uprobe: Optimize uprobes

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Message-ID: <20240712131016.GI27299@noisy.programming.kicks-ass.net>
Date: Fri, 12 Jul 2024 15:10:16 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc: oleg@...hat.com, mingo@...nel.org, andrii@...nel.org,
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	rostedt@...dmis.org, mhiramat@...nel.org, jolsa@...nel.org,
	clm@...a.com, paulmck@...nel.org
Subject: Re: [PATCH v2 00/11] perf/uprobe: Optimize uprobes

On Thu, Jul 11, 2024 at 09:57:44PM -0700, Andrii Nakryiko wrote:

> Anyways, if you'd like to use it, it's at [0]. All you should need to
> build and run it is:
> 
>   $ cd examples/c
>   $ make -j$(nproc) uprobe-stress
>   $ sudo ./uprobe-stress -tN -aM -mP -fR

>   [0] https://github.com/libbpf/libbpf-bootstrap/commit/2f88cef90f9728ec8c7bee7bd48fdbcf197806c3

So, I cannot clone that [0] URL I had to click around github shite for a
while to figure out wtf to clone and where your commit lives, turns out
it is:

	$ git clone https://github.com/libbpf/libbpf-bootstrap.git
	$ cd libbpf-bootstrap
	$ git checkout uprobe-stress

But then I do the above and I'm greeted with:

root@...-ep:/usr/src/libbpf-bootstrap/examples/c# make -j40
  MKDIR    .output
  MKDIR    .output/libbpf
  MKDIR    bpftool
  LIB      libbpf.a
  BPFTOOL  bpftool/bootstrap/bpftool
make[1]: *** /usr/src/libbpf-bootstrap/libbpf/src: No such file or directory.  Stop.
make: *** [Makefile:87: /usr/src/libbpf-bootstrap/examples/c/.output/libbpf.a] Error 2
make: *** Waiting for unfinished jobs....
make[1]: *** /usr/src/libbpf-bootstrap/bpftool/src: No such file or directory.  Stop.
make: *** [Makefile:95: /usr/src/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/bpftool] Error 2

Now what ?!?

BPF is ever such unusable shite :/ It's very near as bad as qemu.