perf stat: Add --log-fd <N> option to redirect stderr elsewhere

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This perf stat option emulates valgrind's --log-fd option, allowing the
user to send perf results elsewhere, and leaving stderr for use by the
program under test.  This complements --output file option, and is
mutually exclusive with it.

   3>results  perf stat --log-fd 3          -- $cmd
   3>>results perf stat --log-fd 3 --append -- $cmd

The perl distro's make test.valgrind target uses valgrind's --log-fd
option, I've adapted it to invoke perf also, and tested this patch
there.

Link: http://lkml.kernel.org/r/1315437244-3788-2-git-send-email-jim.cromie@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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Jim Cromie 2011-09-07 17:14:00 -06:00 • committed by Arnaldo Carvalho de Melo

parent dcc101d1d0

commit 56f3bae706

2 changed files with 24 additions and 1 deletions

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11

tools/perf/Documentation/perf-stat.txt

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14

tools/perf/builtin-stat.c

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