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authorArnaldo Carvalho de Melo <acme@redhat.com>2014-12-17 17:24:45 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-01-21 13:24:31 -0300
commit48000a1aed7422a833220245da43114012c355d7 (patch)
treecebd266d933e33ee27ccf3e8bbcf6f3f48d3387a /tools/perf/Documentation/perf-script.txt
parent6602412215c26cd94af1b78fef56b78a5027b19b (diff)
downloadlinux-48000a1aed7422a833220245da43114012c355d7.tar.gz
perf tools: Remove EOL whitespaces
Janitorial stuff: boredom moment. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-u70i7shys3kths4hzru72bha@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-script.txt')
-rw-r--r--tools/perf/Documentation/perf-script.txt28
1 files changed, 14 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 21494806c0ab..a21eec05bc42 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -125,46 +125,46 @@ OPTIONS
is equivalent to:
perf script -f trace:<fields> -f sw:<fields> -f hw:<fields>
-
+
i.e., the specified fields apply to all event types if the type string
is not given.
-
+
The arguments are processed in the order received. A later usage can
reset a prior request. e.g.:
-
+
-f trace: -f comm,tid,time,ip,sym
-
+
The first -f suppresses trace events (field list is ""), but then the
second invocation sets the fields to comm,tid,time,ip,sym. In this case a
warning is given to the user:
-
+
"Overriding previous field request for all events."
-
+
Alternatively, consider the order:
-
+
-f comm,tid,time,ip,sym -f trace:
-
+
The first -f sets the fields for all events and the second -f
suppresses trace events. The user is given a warning message about
the override, and the result of the above is that only S/W and H/W
events are displayed with the given fields.
-
+
For the 'wildcard' option if a user selected field is invalid for an
event type, a message is displayed to the user that the option is
ignored for that type. For example:
-
+
$ perf script -f comm,tid,trace
'trace' not valid for hardware events. Ignoring.
'trace' not valid for software events. Ignoring.
-
+
Alternatively, if the type is given an invalid field is specified it
is an error. For example:
-
+
perf script -v -f sw:comm,tid,trace
'trace' not valid for software events.
-
+
At this point usage is displayed, and perf-script exits.
-
+
Finally, a user may not set fields to none for all event types.
i.e., -f "" is not allowed.