linux-kernel - Re: [PATCH 2/2] perf data: Fix ctf

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Message-ID: <20150408175947.GB20250@krava.redhat.com>
Date:	Wed, 8 Apr 2015 19:59:47 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	He Kuang <hekuang@...wei.com>
Cc:	bigeasy@...utronix.de, jolsa@...nel.org, acme@...nel.org,
	a.p.zijlstra@...llo.nl, mingo@...hat.com, wangnan0@...wei.com,
	linux-kernel@...r.kernel.org,
	Jérémie Galarneau 
	<jeremie.galarneau@...icios.com>
Subject: Re: [PATCH 2/2] perf data: Fix ctf_writer setupenv failure

On Wed, Apr 08, 2015 at 12:49:20PM +0800, He Kuang wrote:
> Due to babeltrace commit:
>   7f800dc7c2a1 ("ir: make trace environment use bt_object")
> 
> The trace->frozen flag is set in bt_ctf_trace_create_stream(), this flag
> is checked before adding environment field to trace, and causes
> ctf_writer__setup_env() failed. Fix this by setting all environment
> fields before bt_ctf_trace_create_stream().
> 
> Before this patch:
>   $ perf data convert --to-ctf=ctf
>   Error during CTF convert setup.

have you tested with the latest babeltrace sources?
this reminds me the bug they fixed recently, CCing Jeremie

thanks,
jirka

> 
> After this patch:
>   $ perf data convert --to-ctf=ctf
>   [ perf data convert: Converted 'perf.data' into CTF data 'ctf' ]
>   [ perf data convert: Converted and wrote 0.023 MB (596 samples) ]
> 
> Signed-off-by: He Kuang <hekuang@...wei.com>
> ---
>  tools/perf/util/data-convert-bt.c | 30 ++++++++++++++++++++----------
>  1 file changed, 20 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
> index a5b89b9..718dc8a 100644
> --- a/tools/perf/util/data-convert-bt.c
> +++ b/tools/perf/util/data-convert-bt.c
> @@ -604,6 +604,22 @@ static int setup_events(struct ctf_writer *cw, struct perf_session *session)
>  	return 0;
>  }
>  
> +static int ctf_writer__setup_stream(struct ctf_writer *cw)
> +{
> +	struct bt_ctf_stream		*stream;
> +
> +	/* CTF stream instance */
> +	stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class);
> +	if (!stream) {
> +		pr("Failed to create CTF stream.\n");
> +		return -1;
> +	}
> +
> +	cw->stream = stream;
> +
> +	return 0;
> +}
> +
>  static int ctf_writer__setup_env(struct ctf_writer *cw,
>  				 struct perf_session *session)
>  {
> @@ -725,7 +741,6 @@ static int ctf_writer__init(struct ctf_writer *cw, const char *path)
>  {
>  	struct bt_ctf_writer		*writer;
>  	struct bt_ctf_stream_class	*stream_class;
> -	struct bt_ctf_stream		*stream;
>  	struct bt_ctf_clock		*clock;
>  
>  	/* CTF writer */
> @@ -767,15 +782,6 @@ static int ctf_writer__init(struct ctf_writer *cw, const char *path)
>  	if (ctf_writer__init_data(cw))
>  		goto err_cleanup;
>  
> -	/* CTF stream instance */
> -	stream = bt_ctf_writer_create_stream(writer, stream_class);
> -	if (!stream) {
> -		pr("Failed to create CTF stream.\n");
> -		goto err_cleanup;
> -	}
> -
> -	cw->stream = stream;
> -
>  	/* CTF clock writer setup */
>  	if (bt_ctf_writer_add_clock(writer, clock)) {
>  		pr("Failed to assign CTF clock to writer.\n");
> @@ -830,6 +836,10 @@ int bt_convert__perf2ctf(const char *input, const char *path, bool force)
>  	if (ctf_writer__setup_env(cw, session))
>  		goto free_session;
>  
> +	/* CTF writer trace stream setup */
> +	if (ctf_writer__setup_stream(cw))
> +		goto free_session;
> +
>  	/* CTF events setup */
>  	if (setup_events(cw, session))
>  		goto free_session;
> -- 
> 2.3.3.220.g9ab698f
> 
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