Subject: Re: [linux-audio-user] Is everyone sick of interrupts yet?
From: Russell Hanaghan (hanaghan_AT_starband.net)
Date: Wed Sep 29 2004 - 10:05:37 EEST
On Tuesday 28 September 2004 07:48 am, Brad Stafford wrote:
> Thanks Mark and Russell for the reply. I'll be happy with what I have and
> stop trying to get latency into the negative range (if something happens in
> the forest before it happens did it really happen?)
LOL! Now that's funny! :) And it's late and I need to go beddy byes!
YW!
R~
>
> I'll go make music now... I'm one happy tweak-head!
>
> Brad.
>
> ----- Original Message -----
> From: "Russell Hanaghan" <hanaghan_AT_starband.net>
> To: "A list for linux audio users" <linux-audio-user_AT_music.columbia.edu>
> Sent: Tuesday, September 28, 2004 1:42 AM
> Subject: Re: [linux-audio-user] Is everyone sick of interrupts yet?
>
> > On Monday 27 September 2004 10:59 pm, brad stafford wrote:
> > > I just tonight switched from the Planet CCRMA RH9 to FC1. The install
> > > was purely from the CDROMs dated 4/25/2004.
> > >
> > > I've seen all the latest posts about interrupts and did the required
> > > reading on the internet. I really managed to get RH9 cleaned up but in
> > > FC1 I'm seeing something a little different. I have a Delta 1010 and
> > > I'm running an AMD Barton 2.6 with 5 PCI slots. The question is what
> > > the heck are IRQ 16 and 22? I moved the sound and ethernet cards around
> > > to get them to 16 and 22 as they used to be eth0 on 21 and ICE1712 on
> > > 22. I have ACPI turned off as a service but don't have a "disable"
> > > option in the BIOS. I did turn off USB support in the BIOS.
> > >
> > > Is 16 like the equivalent of IRQ 3 since it's following 15?
> > >
> > > [brad_AT_mars brad]$ cat /proc/interrupts
> > > CPU0
> > > 0: 81690 IO-APIC-edge timer
> > > 1: 75 IO-APIC-edge keyboard
> > > 2: 0 XT-PIC cascade
> > > 8: 1 IO-APIC-edge rtc
> > > 9: 0 IO-APIC-level acpi
> > > 12: 836 IO-APIC-edge PS/2 Mouse
> > > 14: 10789 IO-APIC-edge ide0
> > > 15: 735 IO-APIC-edge ide1
> > > 16: 0 IO-APIC-level ICE1712
> > > 22: 21 IO-APIC-level eth0
> > > NMI: 0
> > > LOC: 81633
> > > ERR: 0
> > > MIS: 0
> > >
> > > I'm getting 5.8 msec latency in JACK with 128 frames/period at 44100
> > > and 2 periods/buffer. A huge improvement over the 46.1 msec using RH9
> > > with capabilities.
> > >
> > > Thanks, Brad.
> >
> > To semi paraphrase something I think Mr. Knecht conveyed nicely earlier,
>
> and I
>
> > also believe with much merit...and in my own short but sweet format...
> >
> > Unless your box has plumes of dark grey smoke billowing from it because
> > of
>
> the
>
> > Xruns overload {Well, Athalon does run hot....it could happen} or...
> >
> > The sound is so choppy, it sounds like an extratarestrial life form is
>
> trying
>
> > to contact you or...
> >
> > you just ~can't~ sleep at night bareing the thought of a single Xrun
>
> passing
>
> > b4 your eyes...
> >
> > And assuming your sound is clean and glitchless...I gotta say...If you
> > are getting 5.8 msec @ 128x2 with clean sound and a stable, happy
> > jack...other than those pesky lil' "0 (0)" buggers in the Qjackctl window
> > turnng red on you...Just BACK AWAY FROM THE INTERRUPTS MR.!!!....Put
> > those pci cards
>
> down
>
> > nice and slow and get them hands up where we can see 'em! Put the cover
>
> BACK
>
> > on the machine and record 3 verses of "Don't worry, Be happy"!
> >
> > I am also using a Delta 1010LT on an Athalon Barton chip with a tad less
>
> than
>
> > 1gig DDR 2700 ram. I screwed with it endlessly seeking that "super setup"
> > you know...the setup so clean the bugger will compose, record and mix the
> > music all by itself...And I wasted LOTS of damn time I could have spent
>
> doing
>
> > what WE ACTUALLY are meant to do this for...CREATE MUZIC! :)
> >
> > I run the 2.6 kernel with Realtime-lsm as my only real latency
> > improvement patch {and whatever other bits 'n' pieces Thac's sticks in
> > his kernels} I have been recording in Ardour at 256x2. If the dang Xruns
> > start to give me the urge to break a perfectly good working DAW, I put
> > the SOB in "soft mode"! :) No mo' Xruns! And the recording, even running
> > plugins whilst recording, is perfectly acceptable.
> >
> > The point I'm trying to make is...apply some attention to tweaking your
>
> box
>
> > but not to the point of distraction. If it's working well, I don't care
> > if
>
> my
>
> > soundcard is on INT 204! {eh hem} :)
> >
> > Happy recording and music making!!
> >
> > R~
> >
> > --
> > The Road of Life is paved with Squirrels that couldn't make a decision!
-- The Road of Life is paved with Squirrels that couldn't make a decision!
This archive was generated by hypermail 2b28 : Wed Sep 29 2004 - 10:10:48 EEST