linux-kernel - Re: [PATCHv2 1/3] perf report: Display s390 diagnostic counter sets

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Message-ID: <20190122000111.GE20269@kernel.org>
Date:   Mon, 21 Jan 2019 21:01:11 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Thomas Richter <tmricht@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        brueckner@...ux.vnet.ibm.com, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com
Subject: Re: [PATCHv2 1/3] perf report: Display s390 diagnostic counter sets

Em Mon, Jan 21, 2019 at 07:34:37PM +0100, Jiri Olsa escreveu:
> On Mon, Jan 21, 2019 at 11:17:48AM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Mon, Jan 21, 2019 at 02:13:36PM +0100, Jiri Olsa escreveu:
> > > On Sun, Jan 20, 2019 at 07:18:14PM +0100, Jiri Olsa wrote:
> > > > On Thu, Jan 17, 2019 at 11:00:53AM -0300, Arnaldo Carvalho de Melo wrote:
> > > > 
> > > > SNIP
> > > > 
> > > > > --- a/tools/perf/util/python-ext-sources
> > > > > +++ b/tools/perf/util/python-ext-sources
> > > > > @@ -25,6 +25,7 @@ util/parse-branch-options.c
> > > > >  util/rblist.c
> > > > >  util/counts.c
> > > > >  util/print_binary.c
> > > > > +util/s390-sample-raw.c
> > > > >  util/strlist.c
> > > > >  util/trace-event.c
> > > > >  ../lib/rbtree.c
> > > > 
> > > > hi,
> > > > this change breaks the python module:
> > > > 
> > > >   >>> import perf
> > > >   Traceback (most recent call last):
> > > >     File "<stdin>", line 1, in <module>
> > > >   ImportError: ./perf.so: undefined symbol: color_fprintf
> > > > 
> > > > changelog doesn't say anything about python related change
> > > 
> > > I made some chenages and movedthat raw sample code
> > > under s390.. which cured the python module, but
> > > I haven't tested it on s390.
> > 
> > Nope, I explicitely asked him to build that code for all arches, as we
> > want to process s390 perf.data files on a x86 or arm or any other arch.
> > 
> 
> aah, so this actualy works over the s390 perf archive data on x86 host?
> 
> I missed that in the original conversation, sry for noise

np, I fixed my mistake by making this be done on perf_session__new(),
right after creating the evlist, this way these arch specific bits,
needed only for dumping the raw sample, do not get dragged via evlist.c
into the perf binding :-)

- Arnaldo
 
> jirka
> 
> > I stumbled on this as well, I think the way to go is to get the
> > color_fprintf bits in a separate object to avoid dragging more stuff to
> > the perf binding set of objects and then add that to the python binding.
> >  
> > > Could you please check if code in here works for you:
> > >   git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
> > >   perf/s390
> > > 
> > > if it works, I'll post it
> > > 
> > > thanks,
> > > jirka
> > 
> > -- 
> > 
> > - Arnaldo

-- 

- Arnaldo