Commit 6cf62656 authored by Thomas Richter's avatar Thomas Richter Committed by Arnaldo Carvalho de Melo

perf docs: Add description for stderr

'perf report' displays recorded data on the screen and emits warnings
and debug messages in the status line (last one on screen).

perf also supports the possibility to write all debug messages to stderr
(instead of writing them to the status line).

This is achieved with the following command:

  # ./perf --debug stderr=1 report -vvvvv -i ~/fast.data 2>/tmp/2
  # ll /tmp/2
  -rw-rw-r-- 1 tmricht tmricht 5420835 May  7 13:46 /tmp/2
  #

The usage of variable stderr=1 is not documented, so add it to the perf
man page.
Signed-off-by: default avatarThomas Richter <tmricht@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20190513080220.91966-1-tmricht@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 1b6599a9
...@@ -22,6 +22,8 @@ OPTIONS ...@@ -22,6 +22,8 @@ OPTIONS
verbose - general debug messages verbose - general debug messages
ordered-events - ordered events object debug messages ordered-events - ordered events object debug messages
data-convert - data convert command debug messages data-convert - data convert command debug messages
stderr - write debug output (option -v) to stderr
in browser mode
--buildid-dir:: --buildid-dir::
Setup buildid cache directory. It has higher priority than Setup buildid cache directory. It has higher priority than
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