linux-kernel - Re: [PATCH] tracing: branch tracer, tweak output

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20081112131409.GB24472@elte.hu>
Date:	Wed, 12 Nov 2008 14:14:09 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Theodore Tso <tytso@....edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Steven Rostedt <srostedt@...hat.com>
Subject: Re: [PATCH] tracing: branch tracer, tweak output


* Steven Rostedt <rostedt@...dmis.org> wrote:

> 
> On Wed, 12 Nov 2008, Ingo Molnar wrote:
> 
> > 
> > a small detail:
> > 
> > > For example:
> > >
> > >  bash-3471  [003]   357.014755: [INCORRECT] sched_info_dequeued:sched_stats.h:177
> > >  bash-3471  [003]   357.014756: [correct] update_curr:sched_fair.c:489
> > >  bash-3471  [003]   357.014758: [correct] calc_delta_fair:sched_fair.c:411
> > >  bash-3471  [003]   357.014759: [correct] account_group_exec_runtime:sched_stats.h:356
> > >  bash-3471  [003]   357.014761: [correct] update_curr:sched_fair.c:489
> > >  bash-3471  [003]   357.014763: [INCORRECT] calc_delta_fair:sched_fair.c:411
> > >  bash-3471  [003]   357.014765: [correct] calc_delta_mine:sched.c:1279
> > 
> > it's always good to have such fields aligned vertically. Something 
> > like this would be shorter and visually much easier to parse:
> > 
> >  bash-3471  [003]   357.014755: [ MISS ] sched_info_dequeued:sched_stats.h:177
> >  bash-3471  [003]   357.014756: [ .... ] update_curr:sched_fair.c:489
> >  bash-3471  [003]   357.014758: [ .... ] calc_delta_fair:sched_fair.c:411
> > 
> > any objections against the patch below which implements this?
> 
> How about "[ OK ]" instead of "[ .... ]". That would be easier to 
> understand.

ok, agreed - just the use of capitals is not good, as it unnecessarily 
draws visual attention. How about:

>  bash-3471  [003]   357.014755: [ MISS ] sched_info_dequeued:sched_stats.h:177
>  bash-3471  [003]   357.014756: [  ok  ] update_curr:sched_fair.c:489
>  bash-3471  [003]   357.014758: [  ok  ] calc_delta_fair:sched_fair.c:411

via the patch below?

	Ingo

-------------->
>From 68d119f0a66f7e3663304343b072e56a2693446b Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@...e.hu>
Date: Wed, 12 Nov 2008 14:09:30 +0100
Subject: [PATCH] tracing: finetune branch-tracer output

Steve suggested the to change the output from this:

>  bash-3471  [003]   357.014755: [ MISS ] sched_info_dequeued:sched_stats.h:177
>  bash-3471  [003]   357.014756: [ .... ] update_curr:sched_fair.c:489
>  bash-3471  [003]   357.014758: [ .... ] calc_delta_fair:sched_fair.c:411

to this:

>  bash-3471  [003]   357.014755: [ MISS ] sched_info_dequeued:sched_stats.h:177
>  bash-3471  [003]   357.014756: [  ok  ] update_curr:sched_fair.c:489
>  bash-3471  [003]   357.014758: [  ok  ] calc_delta_fair:sched_fair.c:411

as it makes it clearer to the user what it means exactly.

Acked-by: Steven Rostedt <srostedt@...hat.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/trace/trace.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 728a46e..d842db1 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1657,7 +1657,7 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
 		trace_assign_type(field, entry);
 
 		trace_seq_printf(s, "[%s] %s:%s:%d\n",
-				 field->correct ? " .... " : " MISS ",
+				 field->correct ? "  ok  " : " MISS ",
 				 field->func,
 				 field->file,
 				 field->line);
@@ -1808,7 +1808,7 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
 		trace_assign_type(field, entry);
 
 		trace_seq_printf(s, "[%s] %s:%s:%d\n",
-				 field->correct ? " .... " : " MISS ",
+				 field->correct ? "  ok  " : " MISS ",
 				 field->func,
 				 field->file,
 				 field->line);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/