* Namhyung Kim <namhy...@kernel.org> wrote:
> Hello,
>
> This is a new version of callchain improvement patchset. Basically
> it's almost same as v4 but rebased on current acme/perf/core and some
> functions are renamed as Frederic requested.
>
> Now I'm hunting down a bug in 'perf report -s sym' which was found
> during the test, but I think it's not related to this change as it can
> be reproduced in earlier versions too.
>
> I put this series on 'perf/callchain-v5' branch in my tree
>
> git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
>
> Any comments are welcome, thanks.
One thing I noticed about call-graph profiling:
comet:~/tip/tools/perf> ./perf record -g ~/hackbench 10
callchain: Unknown -g option value: /home/mingo/hackbench
I think a naked -g used to work just fine in the past. Even if such an
error is displayed the output is very unhelpful, it does does a full
perf-record options dump (unnecessary), the bit that is helpful is hidden
amongst many other options:
-g, --call-graph <mode[,dump_size]>
do call-graph (stack chain/backtrace) recording: [fp]
dwarf
and it took me two reads to see that I should specify 'fp'. The '[fp]'
indicates that fp is the default - but that does not appear to be working.
Another thing I noticed is that there are a fair number of conflicts
against perf/core, and some more against Arnaldo's tree.
Otherwise it seems to be working well!
Thanks,
Ingo
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