Brp7/MeerKat 1x vs 2x crunching speeds

Tom M
Tom M
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Thank you. That is food for

Thank you. That is food for thought.

A Proud member of the O.F.A.  (Old Farts Association).  Be well, do good work, and keep in touch.® (Garrison Keillor)  I want some more patience. RIGHT NOW!

HWpecker
HWpecker
Joined: 27 Jan 22
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Been running only Meerkat x5

Been running only Meerkat x5 units for a few days now.
Once in a while there's a unit running running lonely with around 800s-900s being a bit off, they were validated.
Didn't see any of those on the screen myself.

Today I had a compute error without me tinkering:
https://einsteinathome.org/workunit/766701870

I'm running BRP7 Meerkat test app.
Not running petris app.
Ends with error 700 (and 1008), seems to be cuda illegal memory acces?

[09:54:00][31629][ERROR] Error during CUDA device->host time series length transfer (error: 700)
[09:54:00][31629][ERROR] Demodulation failed (error: 1008)!
09:54:00 (31629): called boinc_finish(1008)

Don't know what really is happening there, lets post it in a Meerkat thread.

 

Greetings

Tom M
Tom M
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Peter, There is a bug and

Peter,

There is a bug and trouble section of the website.  Perhaps open a thread there?

OBTW, is that gpu plugged directly into the MB?

Tom M

A Proud member of the O.F.A.  (Old Farts Association).  Be well, do good work, and keep in touch.® (Garrison Keillor)  I want some more patience. RIGHT NOW!

HWpecker
HWpecker
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That'd be a better place

That'd be a better place indeed, thx.

Card is normal plugged to MB, no pci4 issues with cables etc.

Tom M
Tom M
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https://einsteinathome.org/ho

https://einsteinathome.org/host/6767055

This system appears to be getting 1.6M on brp7 tasks running 2x?

If this could be scaled to a 7 or 8 GPU system we could be talking about up to 12.8M.

I wonder what he is doing differently?

Tom M

A Proud member of the O.F.A.  (Old Farts Association).  Be well, do good work, and keep in touch.® (Garrison Keillor)  I want some more patience. RIGHT NOW!

Boca Raton Community HS
Boca Raton Comm...
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Tom M

Tom M wrote:

https://einsteinathome.org/host/6767055

This system appears to be getting 1.6M on brp7 tasks running 2x?

If this could be scaled to a 7 or 8 GPU system we could be talking about up to 12.8M.

I wonder what he is doing differently?

Tom M

 

I don't think it is anything specifically unique except consistent operation. A good CPU and GPU.

It doesn't look like speeds of tasks are anything different from what is typical (although I can't see the wall clock time to run).

But, I could be wrong so mountkidd, correct me if I am!

Ian&Steve C.
Ian&Steve C.
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Tom M

Tom M wrote:

https://einsteinathome.org/host/6767055

This system appears to be getting 1.6M on brp7 tasks running 2x?

If this could be scaled to a 7 or 8 GPU system we could be talking about up to 12.8M.

I wonder what he is doing differently?

Tom M

he's running CUDA MPS and some custom tuning. like I am. the 3080Ti does about 1.7M like this.

more PCIe bandwidth is required when you do this though.

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kksplace
kksplace
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How do you run/use Cuda MPS?

How do you run/use Cuda MPS?

Ian&Steve C.
Ian&Steve C.
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It only works on

It only works on Linux 

https://docs.nvidia.com/deploy/mps/index.html

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kksplace
kksplace
Joined: 24 Feb 18
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Understood. Is there anything

Understood. Is there anything 'extra' I need to do for the MPS to be active? Or is it automatic with the NVIDIA driver and the custom app running?

EDIT: I ran a test overnight of trying to run the app 2 at a time on my 3080. Somewhat surprisingly (at least to me since usage was at 100% with 1 running) the times doubled. So.... it didn't overall help but also didn't hurt for this app.

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