linux-kernel - Re: [PATCH 2/2] tools lib traceevent: Use USECS_PER

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Date:   Mon, 21 Nov 2016 16:11:06 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] tools lib traceevent: Use USECS_PER_SEC instead of
 hardcoded number

Em Mon, Nov 21, 2016 at 11:41:49AM -0500, Steven Rostedt escreveu:
> On Fri, 18 Nov 2016 20:40:22 -0300
> Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> 
> > Em Fri, Nov 18, 2016 at 05:54:01PM -0500, Steven Rostedt escreveu:
> > > From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
> > > 
> > > Instead of using 1000000, define a USECS_PER_SEC macro and use that instead.  
> > 
> > We already have it in tools/include/linux/time64.h :-)
> 
> Here's v2 then. Can you take both patches?

Sure.

- Arnaldo
 
> -- Steve
> 
> 
> From 856b584cb783b658d200aa3fca8faba58d52ae82 Mon Sep 17 00:00:00 2001
> From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
> Date: Tue, 9 Feb 2016 15:40:15 -0500
> Subject: [PATCH] tools lib traceevent: Use USEC_PER_SEC instead of hardcoded
>  number
> 
> Instead of using 1000000, use the define in time64.h instead.
> 
> Also remove the the duplicate defines for NSECS_PER_SEC.
> 
> Link: http://lkml.kernel.org/r/20160209204237.006667394@goodmis.org
> 
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> ---
>  tools/lib/traceevent/event-parse.c | 11 ++++++-----
>  tools/lib/traceevent/event-parse.h |  3 ---
>  2 files changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
> index d6f3cc0a29b0..8206227866dc 100644
> --- a/tools/lib/traceevent/event-parse.c
> +++ b/tools/lib/traceevent/event-parse.c
> @@ -33,6 +33,7 @@
>  #include <stdint.h>
>  #include <limits.h>
>  #include <linux/string.h>
> +#include <linux/time64.h>
>  
>  #include <netinet/in.h>
>  #include "event-parse.h"
> @@ -5450,8 +5451,8 @@ void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
>  	use_usec_format = is_timestamp_in_us(pevent->trace_clock,
>  							use_trace_clock);
>  	if (use_usec_format) {
> -		secs = record->ts / NSECS_PER_SEC;
> -		nsecs = record->ts - secs * NSECS_PER_SEC;
> +		secs = record->ts / NSEC_PER_SEC;
> +		nsecs = record->ts - secs * NSEC_PER_SEC;
>  	}
>  
>  	if (pevent->latency_format) {
> @@ -5463,10 +5464,10 @@ void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
>  			usecs = nsecs;
>  			p = 9;
>  		} else {
> -			usecs = (nsecs + 500) / NSECS_PER_USEC;
> +			usecs = (nsecs + 500) / NSEC_PER_USEC;
>  			/* To avoid usecs larger than 1 sec */
> -			if (usecs >= 1000000) {
> -				usecs -= 1000000;
> +			if (usecs >= USEC_PER_SEC) {
> +				usecs -= USEC_PER_SEC;
>  				secs++;
>  			}
>  			p = 6;
> diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
> index 41b3d2238ed3..dfa06f4e7abf 100644
> --- a/tools/lib/traceevent/event-parse.h
> +++ b/tools/lib/traceevent/event-parse.h
> @@ -172,9 +172,6 @@ struct pevent_plugin_option {
>  #define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
>  #define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)
>  
> -#define NSECS_PER_SEC		1000000000ULL
> -#define NSECS_PER_USEC		1000ULL
> -
>  enum format_flags {
>  	FIELD_IS_ARRAY		= 1,
>  	FIELD_IS_POINTER	= 2,
> -- 
> 2.1.0