netdev - Re: [PATCHv2 0/3] perf tools: Fix prologue generation

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Message-ID: <YpiMMr58nuUN9gQE@krava>
Date:   Thu, 2 Jun 2022 12:08:50 +0200
From:   Jiri Olsa <olsajiri@...il.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Jiri Olsa <olsajiri@...il.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        "linux-perf-use." <linux-perf-users@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        Ian Rogers <irogers@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [PATCHv2 0/3] perf tools: Fix prologue generation

On Wed, Jun 01, 2022 at 03:21:06PM -0700, Andrii Nakryiko wrote:
> On Wed, Jun 1, 2022 at 11:11 AM Jiri Olsa <olsajiri@...il.com> wrote:
> >
> > On Thu, May 26, 2022 at 10:16:11PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Tue, May 10, 2022 at 09:46:56AM +0200, Jiri Olsa escreveu:
> > > > hi,
> > > > sending change we discussed some time ago [1] to get rid of
> > > > some deprecated functions we use in perf prologue code.
> > > >
> > > > Despite the gloomy discussion I think the final code does
> > > > not look that bad ;-)
> > > >
> > > > This patchset removes following libbpf functions from perf:
> > > >   bpf_program__set_prep
> > > >   bpf_program__nth_fd
> > > >   struct bpf_prog_prep_result
> > >
> > > So, the first patch is already in torvalds/master, I tried applying the
> > > other two patches to my local perf/core, that already is merged with
> > > torvalds/master and:
> > >
> > > [root@...co ~]# perf test 42
> > >  42: BPF filter                                                      :
> > >  42.1: Basic BPF filtering                                           : FAILED!
> > >  42.2: BPF pinning                                                   : FAILED!
> > >  42.3: BPF prologue generation                                       : FAILED!
> > > [root@...co ~]#
> > >
> > > I'll push my local perf/core to tmp.perf/core and continue tomorrow.
> >
> > hi,
> > I just rebased my changes on top of your perf/core and it seems to work:
> >
> >         [root@...va perf]# ./perf test bpf
> >          40: LLVM search and compile                                         :
> >          40.1: Basic BPF llvm compile                                        : Ok
> >          40.3: Compile source for BPF prologue generation                    : Ok
> >          40.4: Compile source for BPF relocation                             : Ok
> >          42: BPF filter                                                      :
> >          42.1: Basic BPF filtering                                           : Ok
> >          42.2: BPF pinning                                                   : Ok
> >          42.3: BPF prologue generation                                       : Ok
> >
> > is it still a problem?
> >
> 
> Ok, so I checked with Jakub, net-next will be forwarded to
> linus/master tomorrow or so, so after that bpf-next will get forwarded
> as well and we'll have all those patches of yours. So let's go back to
> plan A: send your perf changes based on bpf-next. Thanks and sorry for
> the extra noise with all the back and forth.

ok, np

jirka