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From: Nick Orlov <bugfixer@list.ru>
To: linux-kernel <linux-kernel@vger.kernel.org>, cpufreq@lists.linux.org.uk
Cc: Andrew Morton <akpm@osdl.org>, Dave Jones <davej@codemonkey.org.uk>
Subject: Re: [PATCH 2.6.18-rc6-mm1 1/2] cpufreq: make it harder for cpu to leave "hot" mode
Date: Mon, 11 Sep 2006 23:30:34 -0400 [thread overview]
Message-ID: <20060912033034.GB3677@nickolas.homeunix.com> (raw)
In-Reply-To: <20060912032924.GA3677@nickolas.homeunix.com>
From: Nick Orlov <bugfixer@list.ru>
Make hysteresis wider (20% instead of 10).
Signed-off-by: Nick Orlov <bugfixer@list.ru>
--- linux-2.6.18-rc6/drivers/cpufreq/cpufreq_ondemand.c 2006-09-11 21:22:50.000000000 -0400
+++ linux-2.6.18-rc6-mm1-nick/drivers/cpufreq/cpufreq_ondemand.c 2006-09-11 20:49:10.000000000 -0400
@@ -25,7 +25,7 @@
*/
#define DEF_FREQUENCY_UP_THRESHOLD (80)
-#define MIN_FREQUENCY_UP_THRESHOLD (11)
+#define MIN_FREQUENCY_UP_THRESHOLD (21)
#define MAX_FREQUENCY_UP_THRESHOLD (100)
/*
@@ -290,12 +315,12 @@
/*
* The optimal frequency is the frequency that is the lowest that
* can support the current CPU usage without triggering the up
- * policy. To be safe, we focus 10 points under the threshold.
+ * policy. To be safe, we focus 20 points under the threshold.
*/
- if (load < (dbs_tuners_ins.up_threshold - 10)) {
+ if (load < (dbs_tuners_ins.up_threshold - 20)) {
unsigned int freq_next;
freq_next = (policy->cur * load) /
- (dbs_tuners_ins.up_threshold - 10);
+ (dbs_tuners_ins.up_threshold - 20);
__cpufreq_driver_target(policy, freq_next, CPUFREQ_RELATION_L);
}
_
--
With best wishes,
Nick Orlov.
next prev parent reply other threads:[~2006-09-12 3:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-12 3:29 [PATCH 2.6.18-rc6-mm1 0/2] " Nick Orlov
2006-09-12 3:30 ` Nick Orlov [this message]
2006-09-12 3:31 ` [PATCH 2.6.18-rc6-mm1 2/2] " Nick Orlov
2006-09-12 20:05 ` [PATCH 2.6.18-rc6-mm1 0/2] " Venkatesh Pallipadi
2006-09-14 4:48 ` Nick Orlov
2006-09-14 21:38 ` Andrew Morton
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