<p>I'm one of the folks performing through a netbook. A dell latitude 2100 -- the rubberized primary-school edition, 2gb ram and one of the atom chipsets. Maybe now in the $300 range?</p>
<p>I use fluidsynth and bristol with alsa and jackd, setting various patches across 8 midi channels, playing through an m-audio usb sound processor, with one or sometimes two usb midi devices as controllers.</p>
<p>I custom-compiled a very lightweight rt kernel. I still use gnome, but turn off networking to prevent memory usage spikes not related to music... and keep a close eye on the available system memory and cpu while playing. Also no holding bristol chords with more than 5 notes. :) I could probably get up to 7 if I lost gnome, but I prefer the minimalist musical approach to avoiding xruns. And I like to be able to use the dell's touchscreen to flip through scanned charts in pdf when I forget what I'm supposed to be playing!</p>
<p>Cheers,<br>
Luke</p>
<p>-----<br>
Luke Peterson<br>
- sent via mobile device -</p>
<div class="gmail_quote">On Oct 25, 2011 5:11 AM, "Jeremy Jongepier" <<a href="mailto:jeremy@autostatic.com">jeremy@autostatic.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 10/25/2011 10:44 AM, Renato wrote:<br>
> On Tue, 25 Oct 2011 10:20:18 +0200<br>
> Jeremy Jongepier <<a href="mailto:jeremy@autostatic.com">jeremy@autostatic.com</a>> wrote:<br>
><br>
>> True. I've set up the netbook to disable all services and unload all<br>
>> drivers I don't need when booting with a realtime kernel.<br>
><br>
> for doing this you simply run a script which figures out the running<br>
> kernel with "uname"?<br>
><br>
<br>
Hi Renato,<br>
<br>
Yes:<br>
<br>
if [ $(uname -r | cut -d "-" -f 3) = "realtime" ]<br>
then /path/to/startstudio<br>
fi<br>
<br>
And the 'startstudio' script looks like this:<br>
<br>
#!/bin/sh<br>
<br>
modprobe -r ppdev<br>
modprobe -r lp<br>
modprobe -r uvcvideo<br>
modprobe -r videodev<br>
modprobe -r ath9k<br>
modprobe -r r8169<br>
modprobe -r btusb<br>
<br>
/etc/init.d/bluetooth stop &<br>
/etc/init.d/cups stop &<br>
/etc/init.d/networking stop &<br>
/etc/init.d/network-manager stop &<br>
/etc/init.d/ondemand stop<br>
<br>
killall modem-manager<br>
killall wpa_supplicant<br>
<br>
modprobe snd-hrtimer<br>
<br>
echo -n performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor<br>
<br>
TASKLETPR=76<br>
<br>
ps -eLo pid,cmd | grep tasklet | grep -v grep | awk '{ system("chrt -f<br>
-p '$TASKLETPR' " $1)}'<br>
<br>
echo -n "0000:00:13.0" > /sys/bus/pci/drivers/ohci_hcd/unbind<br>
<br>
>> And it runs<br>
>> a light DE, rtirq and CPU scaling is set to performance. Also make<br>
>> sure your audio device isn't sharing an interrupt with something<br>
>> else. In my case the onboard soundcard shares an interrupt with a USB<br>
>> controller. I need to unbind the controller otherwise CPU load on the<br>
>> tasklets will quickly rise.<br>
><br>
> what do you mean exactly by unbinding the controller? physically<br>
> removing it?<br>
><br>
<br>
No, writing the ID of the controller to an unbind file, it's the last<br>
line in the startstudio script.<br>
<br>
> cheers,<br>
> renato<br>
<br>
Best,<br>
<br>
Jeremy<br>
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</blockquote></div>