perf trace: Write to stderr by default

Without this patch, it is cumbersome to read the trace output but
ignoring the normal, potentially verbose, output of the debuggee.  One
common example is doing something like the following:

 perf trace -s find /tmp > /dev/null

Without this patch, the trace summary will be lost. Now, it will still
be printed at the end. This behavior is also applied by strace.

Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/n/tip-tqnks6y2cnvm5f9g2dsfr7zl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Milian Wolff 2015-08-05 16:52:23 -03:00 committed by Arnaldo Carvalho de Melo
parent b7a001d206
commit 007d66a0bd
1 changed files with 1 additions and 1 deletions

View File

@ -2965,7 +2965,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
.mmap_pages = UINT_MAX,
.proc_map_timeout = 500,
},
.output = stdout,
.output = stderr,
.show_comm = true,
.trace_syscalls = true,
};