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From: Andi Kleen <andi@firstfloor.org>
To: acme@infradead.org
Cc: eranian@google.com, jolsa@redhat.com,
	linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>
Subject: [PATCH 4/5] perf, tools: flush output after each line in stat interval mode
Date: Fri,  2 Aug 2013 17:41:12 -0700	[thread overview]
Message-ID: <1375490473-1503-5-git-send-email-andi@firstfloor.org> (raw)
In-Reply-To: <1375490473-1503-1-git-send-email-andi@firstfloor.org>

From: Andi Kleen <ak@linux.intel.com>

When interval mode is outputting to a pipe, each measurement
should be flushed individually, so that the reader sees it
timely.

With a terminal each line is automatically flushed by stdio,
but that is disabled with non terminal output.

Simply fflush output after each time interval

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 tools/perf/builtin-stat.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 2e637e4..f686d5f 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -416,6 +416,8 @@ static void print_interval(void)
 		list_for_each_entry(counter, &evsel_list->entries, node)
 			print_counter_aggr(counter, prefix);
 	}
+
+	fflush(output);
 }
 
 static void handle_initial_delay(void)
-- 
1.8.3.1


  parent reply	other threads:[~2013-08-03  0:41 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-03  0:41 Misc perf stat improvements Andi Kleen
2013-08-03  0:41 ` [PATCH 1/5] perf, tools: Remove obsolete dummy execve Andi Kleen
2013-08-12 10:19   ` [tip:perf/core] perf evlist: " tip-bot for Andi Kleen
2013-08-03  0:41 ` [PATCH 2/5] tools, perf: Add support to evsel for enabling counters Andi Kleen
2013-08-05  8:28   ` Namhyung Kim
2013-08-05 16:10     ` Arnaldo Carvalho de Melo
2013-08-12 10:19   ` [tip:perf/core] perf evsel: Add support " tip-bot for Andi Kleen
2013-08-03  0:41 ` [PATCH 3/5] perf, tools: Add support for --initial-delay option to perf stat Andi Kleen
2013-08-12 10:20   ` [tip:perf/core] perf stat: Add support for --initial-delay option tip-bot for Andi Kleen
2013-08-03  0:41 ` Andi Kleen [this message]
2013-08-12 10:20   ` [tip:perf/core] perf stat: Flush output after each line in interval mode tip-bot for Andi Kleen
2013-08-03  0:41 ` [PATCH 5/5] perf, tools: Output running time and run/enabled ratio in CSV mode Andi Kleen
2013-08-05  9:45   ` Jiri Olsa
2013-08-05  9:45 ` Misc perf stat improvements Jiri Olsa

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