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

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Message-ID: <55262C8D.8080109@huawei.com>
Date:	Thu, 9 Apr 2015 15:38:53 +0800
From:	He Kuang <hekuang@...wei.com>
To:	Jiri Olsa <jolsa@...hat.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 2015/4/9 1:59, Jiri Olsa wrote:
> 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

Yes,  the latest babeltrace commit id: 
dfdad2587b12d454e7235e01508a266d83e3e264
>> 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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