Assigning a task to a particular core of esp32 #166
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sergio-caracas
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The only way what you are trying to do is possible is if you run separate schedulers per channel in a dedicated freertos tasks pinned to cores.
As a cooperative scheduler, TaskScheduler does not supper true "parallel" execution as all tasks are running in the same thread.
Conceptually this setup is described here:
https://github.com/arkhipenko/dnd
Sent from my mobile implant.
Apologies for autocorrect.
…________________________________
From: sergio-caracas ***@***.***>
Sent: Saturday, May 13, 2023 4:07:14 AM
To: arkhipenko/TaskScheduler ***@***.***>
Cc: Subscribed ***@***.***>
Subject: [arkhipenko/TaskScheduler] Assigning a task to a particular core of esp32 (Discussion #166)
Hello everyone,
I am trying to get two taskscheduler tasks to run in parallel, one in each of the two cores of the esp32, is it possible?
I have two audio filters (left and right channel) but the algorithm is still very heavy and the sample rate I am achieving is quite low.
Thanks in advance if you could share any suggestions!
Cheers,
Sergio
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Reply to this email directly, view it on GitHub<#166>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AACMMTLOUTV7VPKA7EPSWNLXF46LFANCNFSM6AAAAAAYALBUPU>.
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1 reply
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Thank you very much Mr Arkhipenko! Very interesting and many things became clearer for me after reading your message and through all the code in your dnd project! I need to get about 50kHz filter cycle execution on both channels, but my filters are crashing at what I guess is about 200 microseconds (5 kHz). I shall check if RTOS task granularity can have ticks shorter than 1 millisecond. Will keep looking for more information. Cheers and many thanks, |
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But you can execute any function on a given CPU with esp_ipc_call().
https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/ipc.html#_CPPv412esp_ipc_call8uint32_t14esp_ipc_func_tPv
…On Sat, May 13, 2023 at 1:03 PM Anatoli Arkhipenko ***@***.***> wrote:
The only way what you are trying to do is possible is if you run separate
schedulers per channel in a dedicated freertos tasks pinned to cores.
As a cooperative scheduler, TaskScheduler does not supper true "parallel"
execution as all tasks are running in the same thread.
Conceptually this setup is described here:
https://github.com/arkhipenko/dnd
Sent from my mobile implant.
Apologies for autocorrect.
________________________________
From: sergio-caracas ***@***.***>
Sent: Saturday, May 13, 2023 4:07:14 AM
To: arkhipenko/TaskScheduler ***@***.***>
Cc: Subscribed ***@***.***>
Subject: [arkhipenko/TaskScheduler] Assigning a task to a particular core
of esp32 (Discussion #166)
Hello everyone,
I am trying to get two taskscheduler tasks to run in parallel, one in each
of the two cores of the esp32, is it possible?
I have two audio filters (left and right channel) but the algorithm is
still very heavy and the sample rate I am achieving is quite low.
Thanks in advance if you could share any suggestions!
Cheers,
Sergio
—
Reply to this email directly, view it on GitHub<
#166>, or
unsubscribe<
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>.
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0 replies
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There is no inter-process by design.
Everything runs in the same thread.
You are thinking about this in a multi-threading, multi-process way, and it is not that.
|
0 replies
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You are completely wrong. Please read the documentation I linked to. Thank
you for your co-operation.
On Sat, May 13, 2023 at 1:23 PM Anatoli Arkhipenko ***@***.***>
wrote:
… There is no inter-process by design.
Everything runs in the same thread.
You are thinking about this in a multi-threading, multi-process way, and
it is not that.
Sent from my mobile implant.
Apologies for autocorrect.
________________________________
From: Mariusz ***@***.***>
Sent: Saturday, May 13, 2023 7:13:08 AM
To: arkhipenko/TaskScheduler ***@***.***>
Cc: Anatoli Arkhipenko ***@***.***>; Comment ***@***.***>
Subject: Re: [arkhipenko/TaskScheduler] Assigning a task to a particular
core of esp32 (Discussion #166)
But you can execute any function on a given CPU with esp_ipc_call().
https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/ipc.html#_CPPv412esp_ipc_call8uint32_t14esp_ipc_func_tPv
On Sat, May 13, 2023 at 1:03 PM Anatoli Arkhipenko ***@***.***>
wrote:
> The only way what you are trying to do is possible is if you run
separate
> schedulers per channel in a dedicated freertos tasks pinned to cores.
>
> As a cooperative scheduler, TaskScheduler does not supper true
"parallel"
> execution as all tasks are running in the same thread.
>
> Conceptually this setup is described here:
> https://github.com/arkhipenko/dnd
>
>
>
> Sent from my mobile implant.
> Apologies for autocorrect.
> ________________________________
> From: sergio-caracas ***@***.***>
> Sent: Saturday, May 13, 2023 4:07:14 AM
> To: arkhipenko/TaskScheduler ***@***.***>
> Cc: Subscribed ***@***.***>
> Subject: [arkhipenko/TaskScheduler] Assigning a task to a particular
core
> of esp32 (Discussion #166)
>
>
> Hello everyone,
>
> I am trying to get two taskscheduler tasks to run in parallel, one in
each
> of the two cores of the esp32, is it possible?
>
> I have two audio filters (left and right channel) but the algorithm is
> still very heavy and the sample rate I am achieving is quite low.
>
> Thanks in advance if you could share any suggestions!
>
> Cheers,
> Sergio
>
> —
> Reply to this email directly, view it on GitHub<
> #166>, or
> unsubscribe<
>
https://github.com/notifications/unsubscribe-auth/AACMMTLOUTV7VPKA7EPSWNLXF46LFANCNFSM6AAAAAAYALBUPU
> >.
> You are receiving this because you are subscribed to this thread.Message
> ID: ***@***.***>
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> Reply to this email directly, view it on GitHub
> <
#166 (comment)>,
> or unsubscribe
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1 reply
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@teuthid - you are welcome to submit a working prototype PR using the IPC. |
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@arkhipenko I've used esp_ipc_call() many times in TaskCallback functions to evenly distribute the load across the two cpus. This does not require any modifications to the TaskScheduler. I don't really understand why you consider this to be such a big challenge. Knowledge of ESP-IDF is enough. |
0 replies
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You can try and enable microsecond precision for TaskScheduler. But you might just hit the hardware limit actually.
Sent from my mobile implant.
Apologies for autocorrect.
…________________________________
From: sergio-caracas ***@***.***>
Sent: Sunday, May 14, 2023 11:04:27 AM
To: arkhipenko/TaskScheduler ***@***.***>
Cc: Anatoli Arkhipenko ***@***.***>; Mention ***@***.***>
Subject: Re: [arkhipenko/TaskScheduler] Assigning a task to a particular core of esp32 (Discussion #166)
Thank you very much Mr Arkhipenko!
Very interesting and many things became clearer for me after reading your message and through all the code in your dnd project!
I need to get about 50kHz filter cycle execution on both channels, but my filters are crashing at what I guess is about 200 microseconds (5 kHz).
I shall check if RTOS task granularity can have ticks shorter than 1 millisecond.
Will keep looking for more information.
Cheers and many thanks,
Sergio
—
Reply to this email directly, view it on GitHub<#166 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AACMMTPDJGOPJ4UG2O4CPYLXGDX7XANCNFSM6AAAAAAYALBUPU>.
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Hello everyone,
I am trying to get two taskscheduler tasks to run in parallel, one in each of the two cores of the esp32, is it possible?
I have two audio filters (left and right channel) but the algorithm is still very heavy and the sample rate I am achieving is quite low.
Thanks in advance if you could share any suggestions!
Cheers,
Sergio
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