Interesting. Of course, it _should_ be thermally permitted to run all
cores at speed - and the Pi folk are taking heat dissipation very
seriously in their thinking. So my leaning would be to risk $35 on a
week-long stress test using -nosleep. Hmm, time to order a machine...
cheers
Miller
On
Using the following command to check cpu frequency on RPi model 2B:
sudo watch -n 1 cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq
I found that RPi model 2B does frequency scaling by default (nothing
modified in /boot/config.txt). It switches between 600 and 900 MHz.
This doesn't
Wow. This is getting interesting again !
Thank you Katja for purchasing and testing the new version so quickly.
Pierre.
2015-02-07 15:22 GMT+01:00 katja katjavet...@gmail.com:
10 ms buffer in audio settings was tested OK for this setup:
Raspberry Pi model 2B
Raspbian wheezy, latest image
On 08/02/15 02:52, katja wrote:
As an alternative to pd -nosleep, taskset 0x0001 pd (as per
Simon Wise's suggestion) is another way to run puredata properly on
Raspberry Pi model 2B. This sets 'CPU affinity' for pd to core 1 (you
could set another core in hex format). Apparently the
On Fri, Feb 6, 2015 at 11:56 PM, Miller Puckette m...@ucsd.edu wrote:
Also try running pd -nosleep, which sometimes persuades kernels to
schedule the process differently :)
Indeed, pd -nosleep does the magic. Command htop shows hat the
kernel has 100% CPU time reserved on one core (fixed per
Dear Katja,
Could you please tell us what buffer size you're using in Pd ? Can you get
lower than 16 ms without dropouts with a reasonable patch with both adc and
dac ?
Thanks in advance,
Pierre.
2015-02-07 10:39 GMT+01:00 katja katjavet...@gmail.com:
On Fri, Feb 6, 2015 at 11:56 PM, Miller
Wow, that's unexpected! :(
Are other audio-related things working fine?
-Brian
On Fri, Feb 6, 2015 at 3:40 PM, katja katjavet...@gmail.com wrote:
Hello,
I got that new Raspberry Pi model 2b. It is indeed much faster than b
or b+ in practice, but alarmingly, I can't get useful sound from
Hello,
I got that new Raspberry Pi model 2b. It is indeed much faster than b
or b+ in practice, but alarmingly, I can't get useful sound from Pd.
Continuous dropouts, no matter if built-in output or USB sound card
(iMic) is used. I've built puredata 0.46-2 from Raspbian jessie
source, for sure it
Aplay can play a .wav file without trouble, so it is not a general
problem with the audio hardware or drivers on Pi 2b.
I installed command htop to see CPU load per core. It's interesting,
the load switches from one core to another, and sometimes they all
seem to be almost idle even with a heavy
Also try running pd -nosleep, which sometimes persuades kernels to
schedule the process differently :)
M
On Fri, Feb 06, 2015 at 11:30:03PM +0100, katja wrote:
Claude, thanks for the hint. My /boot/config.txt shows no special
settings, so I guess the CPU is at a fixed frequency. It says that
I've not got any version of the rpi, but maybe it's scaling down the
clock frequency of unused cores, which then takes some time to spin up
to full speed when a task is moved by the kernel?
I also had issues on amd64 desktop and core2duo laptop with pd -rt not
being taken into account by the
Claude, thanks for the hint. My /boot/config.txt shows no special
settings, so I guess the CPU is at a fixed frequency. It says that
'700 MHz is the default' (while model 2B should be at 900 MHz). Seems
I downloaded the 'newest' Raspbian too early (the day after model 2B's
release)... Will try
On 07/02/15 12:22, Simon Wise wrote:
Try one of the other images ... the new ones are there because they run on
ARMv7, and if they have puredata in their repositories then it will be built for
ARMv7 also.
Maybe you will need to build pd yourself, but in any case downloading one of the
On 05/02/15 12:51, Simon Wise wrote:
(I haven't checked out the newest Pi at all yet, it apparently has a very much
more powerful processor so is quite a different beast)
Ok ... so it is a very similar chip with Quad-core ARMv7 replacing the single
core ARMv6, with the rest of the chip
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