linux-kernel - Re: [PATCH v5 2/4] perf record: bind the AIO user space buffers to nodes

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Date:   Tue, 5 Feb 2019 12:15:26 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 2/4] perf record: bind the AIO user space buffers to
 nodes

Em Mon, Feb 04, 2019 at 10:47:03PM +0300, Alexey Budankov escreveu:
> 
> On 04.02.2019 22:29, Arnaldo Carvalho de Melo wrote:
> > Em Tue, Jan 22, 2019 at 08:48:54PM +0300, Alexey Budankov escreveu:
> >>
> >> Allocate and bind AIO user space buffers to the memory nodes
> >> that mmap kernel buffers are bound to.
> > 
> > [root@...co amazonlinux]# perf test -v python
> > 18: 'import perf' in python                               :
> > --- start ---
> > test child forked, pid 526
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> > ImportError: /tmp/build/perf/python/perf.so: undefined symbol: mbind
> 
> Argh. Missed that.
> 
> > test child finished with -1
> > ---- end ----
> > 'import perf' in python: FAILED!
> > [root@...co amazonlinux]#
> > 
> > 
> > Please always use 'perf test' before pushing upstream, I'll try to fix
> > this one, either by linking libnuma into the python binding or by moving
> > the routines using it to a separate file.
> 
> Will do. Thanks for followup.

this seems to do the trick:

diff --git a/tools/perf/util/setup.py b/tools/perf/util/setup.py
index d3ffc18424b5..88ffa995b44b 100644
--- a/tools/perf/util/setup.py
+++ b/tools/perf/util/setup.py
@@ -56,6 +56,7 @@ ext_sources = list(map(lambda x: '%s/%s' % (src_perf, x) , ext_sources))
 perf = Extension('perf',
 		  sources = ext_sources,
 		  include_dirs = ['util/include'],
+		  libraries = ['numa'],
 		  extra_compile_args = cflags,
 		  extra_objects = [libtraceevent, libapikfs],
                  )

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

[root@...co ~]# ldd /tmp/build/perf/python/perf.cpython-37m-x86_64-linux-gnu.so
	linux-vdso.so.1 (0x00007ffdf53c3000)
	libunwind-x86_64.so.8 => /lib64/libunwind-x86_64.so.8 (0x00007fa538b82000)
	libunwind.so.8 => /lib64/libunwind.so.8 (0x00007fa538b66000)
	liblzma.so.5 => /lib64/liblzma.so.5 (0x00007fa538b3d000)
	libnuma.so.1 => /lib64/libnuma.so.1 (0x00007fa538b2f000)
	libpython3.7m.so.1.0 => /lib64/libpython3.7m.so.1.0 (0x00007fa5387b7000)
	libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fa538795000)
	libc.so.6 => /lib64/libc.so.6 (0x00007fa5385cd000)
	libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fa5385b2000)
	/lib64/ld-linux-x86-64.so.2 (0x00007fa538c1a000)
	libdl.so.2 => /lib64/libdl.so.2 (0x00007fa5385ac000)
	libutil.so.1 => /lib64/libutil.so.1 (0x00007fa5385a7000)
	libm.so.6 => /lib64/libm.so.6 (0x00007fa538423000)
[root@...co ~]#

[root@...co ~]# perf test python
18: 'import perf' in python                               : Ok
[root@...co ~]#


So I'm ammending that hunk to the patch that introduces that mbind
usage.

Thanks,

- Arnaldo