thank you Christof for the help and cyrille for the excellent work, breaking it to chunks did the trick!
On Mon, Feb 10, 2020 at 2:01 PM Christof Ressi info@christofressi.com wrote:
when you suggest to spread the op across several dsp ticks you mean for
example not to read the buffer in one go but to break the read to chunks?
Yes.
also, is there a way to "defer low" different tasks in pd?
Not yet, but I've proposed adding such functionality to Pd's API, so it can be used by Pd itself (e.g. for [soundfiler] and also by externals. I already made a working async task queue (for one of my externals), I basically just have to port it from C++ to C and make a PR, but I didn't have time yet :-(
Christof On 10.02.2020 13:04, iftah gabbai wrote:
thanks Christof, unfortunately increasing the delay is not an option for me, when you suggest to spread the op across several dsp ticks you mean for example not to read the buffer in one go but to break the read to chunks? also, is there a way to "defer low" different tasks in pd?
On Mon, Feb 10, 2020 at 12:53 PM Christof Ressi info@christofressi.com wrote:
when i setmem /dumpmem on a 5760000 samples size buffer
Are you trying to do this in a single DSP tick? This would create a CPU spike and lead to audio dropouts, depending on the value of "delay" in the audio settings.
You can either
a) increase "delay" -> more latency -> more chance to "absorb" CPU spikes, or
b) spread the operation across several DSP ticks.
Christof On 10.02.2020 12:38, iftah gabbai wrote:
so i tested it with linux and it works great, my only problem right now is that i get an audible glitch when i setmem /dumpmem on a 5760000 samples size buffer, i tried breaking the setting / dumping to smaller chunks but it only got worse, is there any workaround?
thanks!
On Sat, Feb 1, 2020 at 11:44 AM cyrille henry ch@chnry.net wrote:
yes, I did write that. But Miller implemented a binary transfer from pd to pd~ so the native solution must be lot's more efficient now. I did not test if shmem is still faster.
Yes, using shmem_send~ and shmem_receive~ will add 1 more block latency on top of pd~ latency.
cheers
Le 01/02/2020 à 10:32, iftah gabbai a écrit :
@cyrille, i have another question if i may, i saw somewhere in the
list that you write that streaming audio from pd to a subprocess with shmem is much more efficient in terms of cpu usage, is it still the case? also if i understand correctly from the docs i will then have latency of one block size + fifo right?
On Sat 1. Feb 2020 at 10:29, iftah gabbai <ift.gab@gmail.com <mailto:
ift.gab@gmail.com>> wrote:
@chris, thank you for that, very good piece of info! On Fri 31. Jan 2020 at 20:03, cyrille henry <ch@chnry.net <mailto:ch@chnry.net>> wrote:
Le 31/01/2020 à 18:30, iftah gabbai a écrit : > so it is confirmed to work on linux? if so than great :) it's working on my computer! c > > On Fri 31. Jan 2020 at 13:58, cyrille henry <ch@chnry.netmailto:ch@chnry.net <mailto:ch@chnry.net mailto:ch@chnry.net>> wrote:
> > I don't know why it fail on mac. You can try to splitin smaller table, like you suggested.
> But you should also test it on linux first since it'syour main target.
> > c > > Le 30/01/2020 à 19:55, iftah gabbai a écrit : > > im building on mac os 10.12 and intending to run onlinux(arm), i haven’t tested on linux, the problems im having are on mac,
> > > > thanks! > > > > On Thu 30. Jan 2020 at 17:47, cyrille henry <ch@chnry.net mailto:ch@chnry.net <mailto:ch@chnry.net mailto: ch@chnry.net> <mailto:ch@chnry.net mailto:ch@chnry.net <mailto: ch@chnry.net mailto:ch@chnry.net>>> wrote:
> > > > what is your OS? > > > > Le 30/01/2020 à 17:10, iftah gabbai a écrit : > > > hey C, i have 16gb of ram, and if i did notcompletely messed up my calcs i tried to allocate 2 min of 96khz (11.520.000)
> > > > > > thanks again! > > > > > > On Thu 30. Jan 2020 at 17:06, cyrille henry <ch@chnry.net mailto:ch@chnry.net <mailto:ch@chnry.net mailto: ch@chnry.net> <mailto:ch@chnry.net mailto:ch@chnry.net <mailto: ch@chnry.net mailto:ch@chnry.net>> <mailto:ch@chnry.net mailto: ch@chnry.net <mailto:ch@chnry.net mailto:ch@chnry.net> <mailto: ch@chnry.net mailto:ch@chnry.net <mailto:ch@chnry.net mailto: ch@chnry.net>>>> wrote:
> > > > > > hello, > > > > > > Do you have enough free memory on yourcomputer?
> > > I just test on y computer, I canreproduce this error as soon as I ask an allocation bigger than the available memory on my hardware.
> > > (between 500 000 000 and 1 000 000 000points)
> > > > > > cheers > > > Cyrille > > > > > > Le 30/01/2020 à 12:11, iftah gabbai aécrit :
> > > > ...perhaps i should elaborate, imtrying to dump an array in the size of 11 520 000(2 min of 96 khz audio) to another instance of PD, is it possible at all or do i have to break it to smaller chunks?
> > > > > > > > On Thu, Jan 30, 2020 at 12:01 PM iftahgabbai <ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto: ift.gab@gmail.com mailto:ift.gab@gmail.com> <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto:ift.gab@gmail.com mailto: ift.gab@gmail.com>> <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com> <mailto: ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com>>> <mailto:ift.gab@gmail.com mailto: ift.gab@gmail.com <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com> <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto: ift.gab@gmail.com mailto:ift.gab@gmail.com>> <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto:ift.gab@gmail.com mailto: ift.gab@gmail.com> <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com <mailto:ift.gab@gmail.com mailto:ift.gab@gmail.com>>>>> wrote:
> > > > > > > > hello all, ive been experimentingwith shmem (the latest one i could find in deken), it works fine as long as i use very small arrays, as soon as i try to use bigger arrays ( havent checked where the breakpoint is but more than approx 400000) it doesnt and it returns "could not allocate shmem memory Id"
> > > > > > > > i wonder if im doing somethingwrong or if its a known thing?
> > > > > > > > > > > > thanks! > > > > > > > > > > > >
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