Date: Sat, 28 Jun 2003 16:26:56 -0400
From: pat erley <paterley@drunkencodepoets.com>
To: linux-kernel@vger.kernel.org
Cc: Con Kolivas <kernel@kolivas.org>
Subject: Re: patch-O1int-0306281420 for 2.5.73 interactivity
Message-Id: <20030628162656.06e7e046.paterley@drunkencodepoets.com>
In-Reply-To: <200306281516.12975.kernel@kolivas.org>
References: <200306281516.12975.kernel@kolivas.org>
Organization: drunkencodepoets.com
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1078
Lines: 28

I made a small error when I sent Con a piece of magic I wrote up to help the sleep period.  

what it says right now:

/kernel/sched.c around line 325


sleep_period = (sleep_period *
	17 * sleep_period / ((17 * sleep_period / (5 * tau) + 2) * 5 * tau));
----------------------------------------------------------^

it should be:

sleep_period = (sleep_period *
	17 * sleep_period / ((17 * sleep_period / (5 * tau + 2)) * 5 * tau));
--------------------------------------------------------------^

stupid parenthesis.

a little background.  what this essentially is is a taylor approximation of the function ln(66x+1) normalized.  ln(66x+1) happens to do a great job oas a weighting function on the range of 0 to 1, and because the input only happens to range from 0 to 1, only 2 terms were needed to do a 'good enough' job.

Pat
-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/