Linux-Trace-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Cc: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
	Clark Williams <williams@redhat.com>,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	"Steven Rostedt (VMware)" <rostedt@goodmis.org>,
	Jiri Olsa <jolsa@redhat.com>,
	Tzvetomir Stoyanov <tstoyanov@vmware.com>,
	linux trace devel <linux-trace-devel@vger.kernel.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 07/66] libtraceevent: Round up in tep_print_event() time precision
Date: Wed, 25 Sep 2019 21:31:45 -0300
Message-ID: <20190926003244.13962-8-acme@kernel.org> (raw)
In-Reply-To: <20190926003244.13962-1-acme@kernel.org>

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

When testing the output of the old trace-cmd compared to the one that
uses the updated tep_print_event() logic, it was different in that the
time stamp precision in the old format would round up to the nearest
precision, where as the new logic truncates. Bring back the old method
of rounding up.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Cc: linux trace devel <linux-trace-devel@vger.kernel.org>
Link: http://lore.kernel.org/lkml/20190919165119.5efa5de6@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/traceevent/event-parse.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 6f842af4550b..d948475585ce 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5527,8 +5527,10 @@ static void print_event_time(struct tep_handle *tep, struct trace_seq *s,
 	if (divstr && isdigit(*(divstr + 1)))
 		div = atoi(divstr + 1);
 	time = record->ts;
-	if (div)
+	if (div) {
+		time += div / 2;
 		time /= div;
+	}
 	pr = prec;
 	while (pr--)
 		p10 *= 10;
-- 
2.21.0


       reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190926003244.13962-1-acme@kernel.org>
2019-09-26  0:31 ` Arnaldo Carvalho de Melo [this message]
2019-09-26  0:31 ` [PATCH 08/66] libtraceevent: Man pages for libtraceevent event print related API Arnaldo Carvalho de Melo
2019-09-26  0:31 ` [PATCH 09/66] libtraceevent: Man pages fix, rename tep_ref_get() to tep_get_ref() Arnaldo Carvalho de Melo
2019-09-26  0:31 ` [PATCH 10/66] libtraceevent: Man pages fix, changes in event printing APIs Arnaldo Carvalho de Melo
2019-09-26  0:31 ` [PATCH 11/66] libtraceevent: Add tep_get_event() in event-parse.h Arnaldo Carvalho de Melo
2019-09-26  0:31 ` [PATCH 12/66] libtraceevent: Move traceevent plugins in its own subdirectory Arnaldo Carvalho de Melo
2019-09-26  0:31 ` [PATCH 13/66] libtraceevent: Man pages for tep plugins APIs Arnaldo Carvalho de Melo

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190926003244.13962-8-acme@kernel.org \
    --to=acme@kernel.org \
    --cc=acme@redhat.com \
    --cc=jolsa@kernel.org \
    --cc=jolsa@redhat.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=linux-trace-devel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=namhyung@kernel.org \
    --cc=rostedt@goodmis.org \
    --cc=tglx@linutronix.de \
    --cc=tstoyanov@vmware.com \
    --cc=williams@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Trace-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-trace-devel/0 linux-trace-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-trace-devel linux-trace-devel/ https://lore.kernel.org/linux-trace-devel \
		linux-trace-devel@vger.kernel.org
	public-inbox-index linux-trace-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-trace-devel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git