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| author | Tom Zanussi <tom.zanussi@linux.intel.com> | 2016-03-03 19:54:48 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-04-19 18:17:43 +0200 |
| commit | 0c4a6b4666e8eb86dead3f09b40bb8ca4f614e4f (patch) | |
| tree | abb83cab8f77ce6c89bb07acccedde111632f4d7 /kernel/trace/trace.c | |
| parent | tracing: Add hist trigger support for clearing a trace (diff) | |
| download | linux-0c4a6b4666e8eb86dead3f09b40bb8ca4f614e4f.tar.xz linux-0c4a6b4666e8eb86dead3f09b40bb8ca4f614e4f.zip | |
tracing: Add hist trigger 'hex' modifier for displaying numeric fields
Allow users to have numeric fields displayed as hex values in the
output by appending '.hex' to field names:
# echo hist:keys=aaa,bbb.hex:vals=ccc.hex ... \
[ if filter] > event/trigger
Link: http://lkml.kernel.org/r/67bd431edda2af5798d7694818f7e8d71b6b3463.1457029949.git.tom.zanussi@linux.intel.com
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 4097cd3763f7..2eb2eafbe7f5 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3852,7 +3852,10 @@ static const char readme_msg[] = "\t used to specify more or fewer than the default 2048 entries\n" "\t for the hashtable size.\n\n" "\t Reading the 'hist' file for the event will dump the hash\n" - "\t table in its entirety to stdout.\n\n" + "\t table in its entirety to stdout. The default format used to\n" + "\t display a given field can be modified by appending any of the\n" + "\t following modifiers to the field name, as applicable:\n\n" + "\t .hex display a number as a hex value\n\n" "\t The 'pause' parameter can be used to pause an existing hist\n" "\t trigger or to start a hist trigger but not log any events\n" "\t until told to do so. 'continue' can be used to start or\n" |