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From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 2/2] init: calibrate: don't print out bogomips value on boot
Date: Thu, 20 Jun 2013 17:43:32 +0100	[thread overview]
Message-ID: <1371746612-23950-3-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1371746612-23950-1-git-send-email-will.deacon@arm.com>

BogoMIPs is a confusing concept to the ill-informed, so allow
architectures to print it only if they find it worthwhile. The delay
calibration code should stick to lpj and avoid trying to draw any
correlation with BogoMIPs, which may be a fixed value derived from a
timer frequency independent of the CPU clock speed.

Signed-off-by: Will Deacon <will.deacon@arm.com>
---
 init/calibrate.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/init/calibrate.c b/init/calibrate.c
index fda0a7b..cf48068 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -135,13 +135,13 @@ static unsigned long __cpuinit calibrate_delay_direct(void)
 		if ((measured_times[max] - estimate) <
 				(estimate - measured_times[min])) {
 			printk(KERN_NOTICE "calibrate_delay_direct() dropping "
-					"min bogoMips estimate %d = %lu\n",
+					"min delay estimate %d = %lu\n",
 				min, measured_times[min]);
 			measured_times[min] = 0;
 			min = max;
 		} else {
 			printk(KERN_NOTICE "calibrate_delay_direct() dropping "
-					"max bogoMips estimate %d = %lu\n",
+					"max delay estimate %d = %lu\n",
 				max, measured_times[max]);
 			measured_times[max] = 0;
 			max = min;
@@ -292,9 +292,7 @@ void __cpuinit calibrate_delay(void)
 	}
 	per_cpu(cpu_loops_per_jiffy, this_cpu) = lpj;
 	if (!printed)
-		pr_cont("%lu.%02lu BogoMIPS (lpj=%lu)\n",
-			lpj/(500000/HZ),
-			(lpj/(5000/HZ)) % 100, lpj);
+		pr_cont("lpj=%lu\n", lpj);
 
 	loops_per_jiffy = lpj;
 	printed = true;
-- 
1.8.2.2

  parent reply	other threads:[~2013-06-20 16:43 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-20 16:43 [PATCH v2 0/2] ARM: Remove any correlation between IPC and BogoMips value Will Deacon
2013-06-20 16:43 ` [PATCH v2 1/2] ARM: delay: don't bother reporting bogomips in /proc/cpuinfo Will Deacon
2013-06-20 16:43 ` Will Deacon [this message]
2013-06-20 18:54 ` [PATCH v2 0/2] ARM: Remove any correlation between IPC and BogoMips value Nicolas Pitre
2013-06-21  8:40   ` Will Deacon
2013-06-21  9:47 ` Marc Zyngier

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