24 Jun
2024
24 Jun
'24
5:38 a.m.
Hi,
I've been trying to read through the source code to understand this, but I'm still
having trouble figuring it out.
From what I can see, the neurons are updated using a for loop, meaning each neuron is
updated one at a time. The update function for each neuron can run for multiple timesteps,
but I'm unclear on how its B_.input_buffer_ gets updated while the update function is
running. If it doesn't get updated during this process, wouldn't it miss some
spike events? Additionally, how does the code ensure that neurons updated one at a time
for all simulation steps do not miss any spike events?
Thank you for your help!
Best regards,
Anh Phan
24 Jun
24 Jun
7:01 a.m.
I think I get it now. Is update() called for each neuron every timestep, rather than once
for the entire duration of the simulation?
7:07 a.m.
Hi Anh,
You almost got it right: update() is called once per minimal delay interval. The details
are explained in this paper:
H. E. Plesser, J. M. Eppler, A. Morrison, M. Diesmann, and M.-O. Gewaltig.
Efficient parallel simulation of large-scale neuronal networks on clusters of
multiprocessor computers.
In A.-M. Kermarrec, L. Bougé, and T. Priol, editors, Euro-Par 2007: Parallel Processing,
volume 4641 of Lecture Notes in Computer Science, pages 672-681, Berlin, 2007.
Springer-Verlag. DOI
10.1007/978-3-540-74466-5<https://dx.doi.org/10.1007/978-3-540-74466-5&g…-5>.
Reprint<https://arken.nmbu.no/~plesser/publications/Ples_2007_672.pdf>.
Best,
Hans Ekkehard
--
Prof. Dr. Hans Ekkehard Plesser
Department of Data Science
Faculty of Science and Technology
Norwegian University of Life Sciences
PO Box 5003, 1432 Aas, Norway
Phone +47 6723 1560
Email hans.ekkehard.plesser@nmbu.no<mailto:hans.ekkehard.plesser@nmbu.no>
Home http://arken.nmbu.no/~plesser
From: anh.phan(a)tuni.fi <anh.phan(a)tuni.fi>
Date: Monday, 24 June 2024 at 13:01
To: users(a)nest-simulator.org <users(a)nest-simulator.org>
Subject: [NEST Users] Re: Questions about Neuron Update Mechanism and Spike Event Handling
in Source Code
I think I get it now. Is update() called for each neuron every timestep, rather than once
for the entire duration of the simulation?
_______________________________________________
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To unsubscribe send an email to users-leave(a)nest-simulator.org
25 Jun
25 Jun
3:07 a.m.
Hi
it is a little confusion in the code even for me at the beginning.
By integration it uses adaptive steps so that within 2 time instances of simulation it
needs a loop for multiple small steps too
Hth
Binh
Gesendet mit der mobilen Mail App
Am 24.06.24 um 11:38 schrieb anh.phan(a)tuni.fi
Hi,
I've been trying to read through the source code to understand this, but I'm
still having trouble figuring it out.
From what I can see, the neurons are updated using a for loop, meaning each neuron is
updated one at a time. The update function for each neuron can run for multiple timesteps,
but I'm unclear on how its B_.input_buffer_ gets updated while the update function is
running. If it doesn't get updated during this process, wouldn't it miss some
spike events? Additionally, how does the code ensure that neurons updated one at a time
for all simulation steps do not miss any spike events?
Thank you for your help!
Best regards,
Anh Phan
_______________________________________________
NEST Users mailing list -- users(a)nest-simulator.org
To unsubscribe send an email to users-leave(a)nest-simulator.org
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days inactive
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4 comments
3 participants
participants (3)
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anh.phan＠tuni.fi -
Hans Ekkehard Plesser -
thanh-binh.to＠online.de