From: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
To: Dave Jones <davej@redhat.com>
Cc: Alexander Clouter <alex-kernel@digriz.org.uk>,
cpufreq@lists.linux.org.uk,
Eric Piel <Eric.Piel@tremplin-utc.net>,
linux@dominikbrodowski.net, Rajesh Shah <rajesh.shah@intel.com>
Subject: [PATCH] [5/5] ondemand governor default sampling downfactor as 1
Date: Wed, 18 May 2005 13:40:12 -0700 [thread overview]
Message-ID: <20050518134012.F22282@unix-os.sc.intel.com> (raw)
[PATCH] [5/5] ondemand governor default sampling downfactor as 1
Make default sampling downfactor 1.
This works better with earlier auto downscaling change in ondemand governor.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
--- linux-2.6.11/drivers/cpufreq/cpufreq_ondemand.c.org 2005-03-11 19:41:12.000000000 -0800
+++ linux-2.6.11/drivers/cpufreq/cpufreq_ondemand.c 2005-03-11 19:43:00.000000000 -0800
@@ -51,7 +51,8 @@ static unsigned int def_sampling_rat
#define MIN_SAMPLING_RATE (def_sampling_rate / 2)
#define MAX_SAMPLING_RATE (500 * def_sampling_rate)
#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000)
-#define DEF_SAMPLING_DOWN_FACTOR (10)
+#define DEF_SAMPLING_DOWN_FACTOR (1)
+#define MAX_SAMPLING_DOWN_FACTOR (10)
#define TRANSITION_LATENCY_LIMIT (10 * 1000)
#define sampling_rate_in_HZ(x) (((x * HZ) < (1000 * 1000))?1:((x * HZ) / (1000 * 1000)))
@@ -119,6 +120,9 @@ static ssize_t store_sampling_down_facto
if (ret != 1 )
return -EINVAL;
+ if (input > MAX_SAMPLING_DOWN_FACTOR || input < 1)
+ return -EINVAL;
+
down(&dbs_sem);
dbs_tuners_ins.sampling_down_factor = input;
up(&dbs_sem);
reply other threads:[~2005-05-18 20:40 UTC|newest]
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