1 Mar
2003
1 Mar
'03
10:43 p.m.
Hi,
I'm building a new low latency + preemption patched
machine. I've forgotten how to confirm that the kernel
is running preemptively. It's a command to the effect
of 'cat /proc/something'. Anyone know what I'm
referring to?
Also, can someone point me to docs for enabling/using
a capabilities enabled kernel? Enabling normal user
capabilities for jackd is my objective. I believe
Fernando has this included in the CCRMA stuff but a
quick google didn't find any docs. They're probably
there. Hints appreciated. I'll search LAD
archives...it's probably all there.
Jan, your link to Paul Winkler's Low Lowlatency docs
at boosthardware are brooken.
Thanks,
ron
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1 Mar
1 Mar
11:16 p.m.
Ron,
cat /proc/sys/kernel/lowlatency
it should be 1 if it's enabled. I'll fix the link when I get back from
Charleston, SC next Friday. Thanks.
Jan
On Sat, 2003-03-01 at 20:35, R Parker wrote:
Hi,
I'm building a new low latency + preemption patched
machine. I've forgotten how to confirm that the kernel
is running preemptively. It's a command to the effect
of 'cat /proc/something'. Anyone know what I'm
referring to?
Also, can someone point me to docs for enabling/using
a capabilities enabled kernel? Enabling normal user
capabilities for jackd is my objective. I believe
Fernando has this included in the CCRMA stuff but a
quick google didn't find any docs. They're probably
there. Hints appreciated. I'll search LAD
archives...it's probably all there.
Jan, your link to Paul Winkler's Low Lowlatency docs
at boosthardware are brooken.
Thanks,
ron
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11:37 p.m.
On Saturday 01 March 2003 21:35, R Parker wrote:
Hi,
I'm building a new low latency + preemption patched
machine. I've forgotten how to confirm that the kernel
is running preemptively. It's a command to the effect
of 'cat /proc/something'. Anyone know what I'm
referring to?
Try "cat /proc/sys/kernel/lowlatency" or "echo 1 >
/proc/sys/kernel/lowlatency" to enable it.
This is with the warning that I don't know if this enables the kernel
pre-emption, or just the low-latency patch. What I'm saying is that there
seems to be more than one patch for the 2.4.x kernel and I don't know if this
file enables all of them or just one or some.
Larry
2 Mar
2 Mar
6:25 a.m.
Just low latency. If you've used Robert Love's patches they are always
on.
Jan
On Sat, 2003-03-01 at 21:33, Larry Troxler wrote:
On Saturday 01 March 2003 21:35, R Parker wrote:
Hi,
I'm building a new low latency + preemption patched
machine. I've forgotten how to confirm that the kernel
is running preemptively. It's a command to the effect
of 'cat /proc/something'. Anyone know what I'm
referring to?
Try "cat /proc/sys/kernel/lowlatency" or "echo 1 >
/proc/sys/kernel/lowlatency" to enable it.
This is with the warning that I don't know if this enables the kernel
pre-emption, or just the low-latency patch. What I'm saying is that there
seems to be more than one patch for the 2.4.x kernel and I don't know if this
file enables all of them or just one or some.
Larry
9:48 a.m.
On Sat, Mar 01, 2003 at 06:35:02 -0800, R Parker wrote:
Also, can someone point me to docs for enabling/using
a capabilities enabled kernel? Enabling normal user
capabilities for jackd is my objective. I believe
Fernando has this included in the CCRMA stuff but a
quick google didn't find any docs. They're probably
there. Hints appreciated. I'll search LAD
archives...it's probably all there.
I do wonder why youre not using Planet? It makes things gloriously easy.
I not have planet+rh8 on both my music PCs and I recon it saves me hours a
week.
- Steve
3:07 p.m.
Hi,
--- Steve Harris <S.W.Harris(a)ecs.soton.ac.uk> wrote:
On Sat, Mar 01, 2003 at 06:35:02 -0800, R Parker
wrote:
I'm a masochist. :) Actually, I thought it'd be
interesting to give gentoo a run. The hype for gentoo
is the granularity for building to the hardware.
Perhaps that's a bit over cooked but everything is
compiled from source. Gentoo's package system,
portage, is configurable (CFLAGS, Keywords for
library environments, etc) and my sense is that it can
ease managing a system that's freguently updated.
Well, for me there's alot of learning to be done.
I definitely agree with your estimate of Planet, it's
a nice looking piece of work. During the next 30 hours
of scratching my head, I'll be to far into gentoo to
turn around and take advantage of Fernando's work.
Why did you mention Planet...I'm starting to question
my decision. We're gonna have to fight! :)
ron
Also, can someone point me to docs for
enabling/using
a capabilities enabled kernel? Enabling normal
user
capabilities for jackd is my objective. I
believe
Fernando has this included in the CCRMA stuff but
a
quick google didn't find any docs.
They're
probably
there. Hints appreciated. I'll search LAD
archives...it's probably all there.
I do wonder why youre not using Planet? It makes
things gloriously easy.
I not have planet+rh8 on both my music PCs and I
recon it saves me hours a
week. - Steve
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3 Mar
3 Mar
12:53 a.m.
Also, can someone point me to docs for enabling/using
a capabilities enabled kernel? Enabling normal user
capabilities for jackd is my objective. I believe
Fernando has this included in the CCRMA stuff but a
quick google didn't find any docs. They're probably
there. Hints appreciated. I'll search LAD
archives...it's probably all there.
This is what you need:
==== CUT HERE ====
--- linux/include/linux/capability.h~ Thu Nov 22 11:46:19 2001
+++ linux/include/linux/capability.h Fri Mar 15 15:16:20 2002
@@ -303,8 +303,8 @@
#define CAP_EMPTY_SET to_cap_t(0)
#define CAP_FULL_SET to_cap_t(~0)
-#define CAP_INIT_EFF_SET to_cap_t(~0 & ~CAP_TO_MASK(CAP_SETPCAP))
-#define CAP_INIT_INH_SET to_cap_t(0)
+#define CAP_INIT_EFF_SET to_cap_t(~0)
+#define CAP_INIT_INH_SET to_cap_t(~0)
#define CAP_TO_MASK(x) (1 << (x))
#define cap_raise(c, flag) (cap_t(c) |= CAP_TO_MASK(flag))
==== CUT HERE ====
-- Fernando
7939
days inactive
7940
days old
linux-audio-user@lists.linuxaudio.org
6 comments
5 participants
participants (5)
-
Fernando Pablo Lopez-Lezcano -
Jan "Evil Twin" Depner -
Larry Troxler -
R Parker -
Steve Harris