linux-kernel - [patch] hackbench: flush buffers before fork

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Date:	Mon, 23 Jun 2008 12:43:33 -0500
From:	Nathan Lynch <ntl@...ox.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, yanmin_zhang@...ux.intel.com
Subject: [patch] hackbench: flush buffers before fork

Here's a fixlet for the hackbench program found at

http://people.redhat.com/mingo/cfs-scheduler/tools/hackbench.c

When redirecting hackbench output I am seeing multiple copies of the
"Running with %d*40 (== %d) tasks" line.  Need to flush the buffered
output before forking.


diff --git a/hackbench.c b/hackbench.c
index 7b90840..e830461 100644
--- a/hackbench.c
+++ b/hackbench.c
@@ -321,6 +321,8 @@ int main(int argc, char *argv[])
 	printf("Running with %d*40 (== %d) tasks.\n",
 		num_groups, num_groups*40);
 
+	fflush(NULL);
+
 	if (argc > 2) {
 		if ( !strcmp(argv[2], "process") )
 			process_mode = 1;
-- 
1.5.4.rc5.5.gab98

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