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SubjectRe: [Patch 1/4] perf report: Add function for verbose dump of raw data
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On 01/11/2019 03:00 PM, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jan 11, 2019 at 12:52:56PM +0100, Thomas Richter escreveu:
>> Add support to call an architecture dependend function to interpret
>> raw data verbatim when dumping the perf.data file with
>> option -D.
>
> Please add "per-arch" to the summary, so that just by looking at my
> inbox main page I can see what this is about.
>

Will do.

> Also how this will deal with processing a perf.data file generated on a
> S/390 machine in another arch? I.e.
>
> on s/390:
>
> perf record -a sleep 10
>
> on a x86_64:
>
> scp that file
> perf report -i perf.data.from.s390
>
> ?
>

This is then the raw data in byte format, as in
[root@f29 perf]# ./perf report -D \
-i ~/perf-s390-ctrset/perf.data.s390.ctrset
....
0x750 [0x6e8]: event: 9
.
. ... raw event: size 1768 bytes
. 0000: 09 00 00 00 01 00 e8 06 1d 00 00 00 00 00 00 00 ................
. 0010: 00 00 00 00 00 00 00 00 34 82 00 00 34 82 00 00 ........4...4...
. 0020: 04 a3 d3 1e c4 01 00 00 00 00 00 00 00 00 00 00 ................
. 0030: a0 0f 00 00 00 00 00 00 00 00 06 ac fe ef 00 00 ................
. 0040: 00 06 00 00 00 00 00 00 01 6c c8 ad 00 00 00 00 .........l......
. 0050: 00 d2 cf a5 00 00 00 00 00 00 39 93 00 00 00 00 ..........9.....
. 0060: 00 04 0c df 00 00 00 00 00 00 2c 97 00 00 00 00 ..........,.....
. 0070: 00 08 82 01 fe ef 00 01 00 02 00 00 00 00 00 00 ................
. 06b0: 00 00 14 58 d5 80 20 9a 29 34 a5 53 d5 80 20 9a ...X.. .)4.S.. .
. 06c0: 28 15 83 53 00 00 00 00 00 00 00 00 00 00 00 00 (..S............
. 06d0: 00 00 00 00 d5 80 19 5e 46 96 8a 74 39 06 00 00 .......^F..t9...
. 06e0: 00 00 00 00 00 00 00 00 ........

0 1941842404100 0x750 [0x6e8]: PERF_RECORD_SAMPLE(IP, 0x1): 33332/33332: 0 peri>
... thread: facultaet:33332
...... dso: <not found>



> report code should lookup a function for the architecture the perf.data
> was recorded on, using the perf.data file header, etc.
>
> const char *arch_name = perf_env__arch(session->header->env);
>
> Then lookup a table to find the right function, ok? See arch__find() for
> an example used in the annotation code.
>
> - Arnaldo
>

I can make this platform independent and call a function to display
the event raw data collected on a s/390 and any other platform.
I will start with s390 and x86.

--
Thomas Richter, Dept 3303, IBM s390 Linux Development, Boeblingen, Germany
--
Vorsitzende des Aufsichtsrats: Martina Koederitz
Geschäftsführung: Dirk Wittkopp
Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294

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