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Date: Fri, 16 Jan 2015 13:23:09 +0800
From: Wang Nan <wangnan0@huawei.com>
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Subject: [diamon-discuss] [BUG] perf data convert to ctf fail.
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To: Jiri Olsa <jolsa@redhat.com>, Jiri Olsa <jolsa@kernel.org>
Cc: "diamon-discuss@lists.linuxfoundation.org" <diamon-discuss@lists.linuxfoundation.org>, Li Zefan <lizefan@huawei.com>

Hi Jiri Olsa,

We are working on your perf convert to ctf patches and trying to
convert perf.data into CTF trace. By introducing 8 patches from your
repository (the last 8 patches of branch perf/core_ctf_convert) we can
use 'perf data convert --to-ctf' command. However, it doesn't work properly:

 $ perf record ls
 $ perf data convert --to-ctf ./out.ctf
close: Bad file descriptor
Failed to create CTF stream
[ perf data convert: Converted 'perf.data' into CTF data './out.ctf' ]
[ perf data convert: Converted and wrote 0.000 MB (1 samples) ]

After some debug we found that the problem raises from libbaleltrace:
in bt_ctf_writer_create_stream() --> bt_ctf_trace_create_stream(), it tries
to create a stream from stream_class, but doesn't provide a stream_id. When
bt_ctf_trace_create_stream() tries to allocate an id for it, the stream_class
has been freezed.

Could you please have a look at this problem?

Thank you!