Hi, namhyung On Thu, Nov 20, 2014 at 03:11:19PM +0900, Namhyung Kim wrote: > On Wed, 19 Nov 2014 13:35:15 -0500, Steven Rostedt wrote: > > On Tue, 18 Nov 2014 14:57:26 +0900 > > byungchul.p...@lge.com wrote: > > > >> From: Byungchul Park <byungchul.p...@lge.com> > >> > >> Currently, some tracers tracing latency print "!" or "+" just after time > >> to signal overhead, depending on the interval between events. Even it is > >> usually enough to do that, we sometimes need to be signaled for bigger > >> interval than 100 micro seconds. > >> > >> Signed-off-by: Byungchul Park <byungchul.p...@lge.com> > >> --- > >> Documentation/trace/ftrace.txt | 8 +++++--- > >> kernel/trace/trace_output.c | 23 ++++++++++++++++++----- > >> 2 files changed, 23 insertions(+), 8 deletions(-) > >> > >> diff --git a/Documentation/trace/ftrace.txt > >> b/Documentation/trace/ftrace.txt > >> index f827e2f..64efb3e 100644 > >> --- a/Documentation/trace/ftrace.txt > >> +++ b/Documentation/trace/ftrace.txt > >> @@ -680,9 +680,11 @@ The above is mostly meaningful for kernel developers. > >> needs to be fixed to be only relative to the same CPU. > >> The marks are determined by the difference between this > >> current trace and the next trace. > >> - '!' - greater than preempt_mark_thresh (default 100) > >> - '+' - greater than 1 microsecond > >> - ' ' - less than or equal to 1 microsecond. > >> + '$' - greater than 1 second > >> + '#' - greater than 1000 microsecond > >> + '!' - greater than 100 microsecond > >> + '+' - greater than 10 microsecond > > I've noticed that it's now changed from 1 msec to 10 msec. Is it okay? >
Yes it is okay. Steve asked for changing the value. :) Thanks, Byungchul > Thanks, > Namhyung > > > >> + ' ' - less than or equal to 10 microsecond. > >> > >> The rest is the same as the 'trace' file. > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
