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From: broonie@opensource.wolfsonmicro.com (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/5] ARM: S5PV210: Initial CPUFREQ Support
Date: Mon, 19 Jul 2010 10:09:14 +0100	[thread overview]
Message-ID: <20100719090914.GC15693@rakim.wolfsonmicro.main> (raw)
In-Reply-To: <AANLkTine-RPFqd1zp-vu4xRaidhngU0t3hC3SP_bXfWw@mail.gmail.com>

On Mon, Jul 19, 2010 at 09:40:24AM +0900, MyungJoo Ham wrote:

> Uh oh.. I didn't mean that the default ramp time is the "required" or
> "suggested" by the PMIC, but I meant that it is required by the CPU to
> execute instructions without possible CPU lockups due to lower voltage

You're still missing my point here.  What I'm saying is that by using
the slower default ramp rate of the PMIC you're making the length of the
stall in execution introduced by waiting for the ramp to complete more
severe than it needs to be, thus increasing the impact on the system and
the need to do work in software to mitigate that.  Reducing the ramp
time should result in improved system performance.

  reply	other threads:[~2010-07-19  9:09 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-15  9:06 [PATCH 0/5] ARM: S5PV210: CPUFREQ Initial Support MyungJoo Ham
2010-07-15  9:06 ` [PATCH 1/5] ARM: Samsung SoC: added hclk/pclk info to s3c_freq for s5pv210 cpu-freq MyungJoo Ham
2010-07-15  9:06   ` [PATCH 2/5] ARM: S5P: Added default pll values for APLL 800/1000MHz MyungJoo Ham
2010-07-15  9:06     ` [PATCH 3/5] ARM: S5PV210: macros for clock registers at regs-clock.h MyungJoo Ham
2010-07-15  9:06       ` [PATCH 4/5] ARM: S5PV210: add DMCx access virtual address MyungJoo Ham
2010-07-15  9:06         ` [PATCH 5/5] ARM: S5PV210: Initial CPUFREQ Support MyungJoo Ham
2010-07-15 11:59           ` Mark Brown
2010-07-16  5:37             ` MyungJoo Ham
2010-07-16  5:42               ` Kyungmin Park
2010-07-16  6:23                 ` MyungJoo Ham
2010-07-16  8:17               ` Mark Brown
2010-07-16  8:30                 ` MyungJoo Ham
2010-07-16  8:42                   ` Mark Brown
2010-07-16  9:01                     ` MyungJoo Ham
2010-07-16  9:37                       ` Mark Brown
2010-07-19  0:40                         ` MyungJoo Ham
2010-07-19  9:09                           ` Mark Brown [this message]
2010-07-19 10:57                             ` MyungJoo Ham
2010-07-16 12:04     ` [PATCH 2/5] ARM: S5P: Added default pll values for APLL 800/1000MHz Kukjin Kim

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