Re: [PATCH]O19int

[Apurva Mehta]

* Con Kolivas <kernel@xxxxxxxxxxx> [29-08-2003 15:26]:
> Small error in the just interactive logic has been corrected.
> 
> Idle tasks get one higher priority than just interactive so they don't get 
> swamped under heavy load.
> 
> Cosmetic cleanup.
> 
> Patch against 2.6.0-test4-mm2

I am using it against 2.6.0-test4-mm3-1. I get quite severe music
skipping while scrolling a relatively light website (slashdot) on
Firebird even when there is no other load. I am attaching some of the
numbers I captured during while there was skipping going on. I am also
attaching the script I used to capture the numbers.

A long skip occured during the first few seconds of the test (while
scrolling the website). In the remaining time I opened emacs and then
switched to kghostview (which had been idle for a long time and looked
like it had to be brought out of swap ie.. there was a relatively long
delay before I could use it). The sound did not skip again.

Apart from the above incident, this patch feels better as compared to
O16.3int. 

Keep up the good work..

Regards,

	- Apurva

Attachment: numbers.tar.bz2
Description: BZip2 compressed data

#!/bin/bash

# Linux interactivity profiler script
# requires profile=2 (or 1?) as a kernel boot param
# Script takes optional number of iterations
# param., default is 10 iterations

# reset the profiler
/usr/sbin/readprofile -r

KERN=$(uname -r)
OUT_DIR=/root/profs/

#[ -w ${OUT_DIR} ] || OUT_DIR=$(pwd)

if [ -z $1 ]; then
        ITS=10
else
        ITS=$1
fi

# Collect vmstat output
vmstat 1 ${ITS}|cat -n > ${OUT_DIR}/${KERN}-vmstat &

# Collect top output
top b d1 n${ITS} > ${OUT_DIR}/${KERN}-top &

n=1
# Collect profile
while [ ${n} -le ${ITS} ]; do

        /usr/sbin/readprofile -n -m /boot/System.map-${KERN} \
        | sort -nr -k 3,3 > ${OUT_DIR}/${KERN}-prof.${n}

        n=$(( ${n} + 1 ))

        sleep 1
done