New Einstein@Home Radio Pulsar Search and NVIDIA GPU Code

Einstein@Home is beginning a new round of searching for radio pulsars in short-orbital-period binary systems.

This is accompanied by the release of a new application (called BRP3). The new application is particularly efficient on NVIDIA Graphics Processor Cards (up to a factor of 20 faster than the CPU-only application). In addition, when running on an NVIDIA GPU card, this new application makes very little use of the CPU (typically around 20% CPU use when the GPU is devoted to Einstein@Home).

The NVIDIA GPU application is initially available for Windows and Linux only. We hope to have a Macintosh version available soon. Due to limitations in the NVIDIA drivers, the Linux version still makes heavy use of the CPU. This will be fixed in Spring 2011, when a new version of the NVIDIA Driver is released. Many thanks to NVIDIA technical support for their assistance!

Because we have exhausted the backlog of data from Arecibo Observatory, this new application is being shipped with data from the Parkes Multibeam Pulsar Survey (from the Parkes Radio Telescope in Australia). In the next weeks we expect to also start using this new application on fresh Arecibo data taken with the latest 'Mock Spectrometer' back-end.

Questions, problems or bug reports related to this new application and search should be reported in this news item thread as a 'Comment'.

Bruce Allen
Director, Einstein@Home

Comments

Stephen W
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New Einstein@Home Radio Pulsar Search and NVIDIA GPU Code

I'm running an i7 with two nvidia 470 gtx video card and Linux which seem to be getting computational errors on the new process. They seem to run ok till the end and then error out.

Oliver Bock
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RE: I'm running an i7 with

Quote:
I'm running an i7 with two nvidia 470 gtx video card and Linux which seem to be getting computational errors on the new process. They seem to run ok till the end and then error out.

Please provide some details so we can look into the problem. It'd be best to post links to the results/tasks that failed.

Thanks,
Oliver

 


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Bruce Allen
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I assume it's these

Oliver Bock
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RE: I assume it's these

Quote:

I assume it's these ones?

http://einsteinathome.org/host/3803628/tasks

Ok, looking at the error descriptions it seems that your BOINC client installation doesn't work properly, most likely to due to missing privileges (it has affected almost all E@H tasks on your host, it's not specific to the Radio Pulsar Search application). I recommend you reinstall the BOINC software, probably using the one that comes with your Linux distribution.

If that doesn't work please consider opening a separate thread in the Problems and Bug Reports board.

Hope this helps,

Oliver

 


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Stephen W
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Yes

Yes

Oliver Bock
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Update: please check that

Update: please check that your host is able to run 32 bit applications. Right now it seems that it can only run 64 bit apps.

Oliver

 


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Jeroen_9
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RE: I'm running an i7 with

Quote:
I'm running an i7 with two nvidia 470 gtx video card and Linux which seem to be getting computational errors on the new process. They seem to run ok till the end and then error out.

It looks like the runtime on your tasks are showing as 0. You might want to check to see if there are any missing dependencies with these commands:

cd projects/einstein.phys.uwm.edu
ldd einsteinbinary_BRP3_1.06_i686-pc-linux-gnu__BRP3cuda32fullCPU

This should show all required libraries and if any are missing. Then also check to make sure IA32 support is enabled in kernel if running on a 64-bit system.

Stephen W
Stephen W
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I tried reinstalling boinc

I tried reinstalling boinc and that did not work. It may have made things worse. So since the machine is only running boinc projects I reinstalled ubuntu and the nvidia drives then bionic. So far things are looking good.thanks for the help.

edjcox
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Can you provide a link to the

Can you provide a link to the new GPU code so I may run it?

Richard Haselgrove
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RE: Can you provide a link

Quote:
Can you provide a link to the new GPU code so I may run it?


Your Intel machine is running it already.

Ascholten
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First I want to say thank

First I want to say thank you. Finally the GPU code is stable enough that I can run it on my machine without having to take one of the processors off crunching the CPU code to handle feeding GPU. Finally the code is stable enough that I dont have to cripple my vid card to have it not error out trying to run one of these.

I do have a question though. Currently on my GTX570 it is only running at about 35 percent GPU utilization. Are there any plans on improving the code to run at higher utilization rates hence more work for the time from the GPU's. Some projects, like milky way for example run in the upper 90's. It'd be nice to see einstein being able to use most of what the card can give us to crunch the numbers.

If there are tweaks or something else I can do that makes a significant difference in utilization (ie more than just a few percent) can someone please share them so I can try.

Thank you
Aaron

If god meant for us not to BOINC he'd have made our #$%^%^ shorter!!

Rechenkuenstler
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What you can do is using a

What you can do is using a app_info.xml file run 3 GPU tasks in parallel. That should increase the GPU usage to ~90%

Oliver Bock
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RE: Currently on my GTX570

Quote:
Currently on my GTX570 it is only running at about 35 percent GPU utilization.

That might be influenced by how much your CPU cores are utilized and how much GPU memory is used by other things (e.g. your desktop). Our tests show that a single instance of the GPU app uses up to 73% when there are no other tasks running (remember: it still depends on approx. 5-30% of a CPU core, depending on your hardware) as the CPU still needs to feed the GPU.

Cheers,
Oliver

 


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Rechenkuenstler
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My experience shows, that the

My experience shows, that the GPU usage depends on the capacity of the vid card.

The more powerful the card, the less the usage of CPU capacity by one BRP task.

Example:

Quattro FX 770M has ~80% CPU usage with 210 minutes to finish
GT240 has ~75% with 145 minutes to finish
GTX240 has ~60% with 90 minutes to finish
GTX460 has ~50% with 55 minutes to finish

This results are more or less independend from the CPU usage, since BRP version 1.05

That means, that one BRP task can't create more GPU usage at the moment. So the alternative is to run more than one BRP tasks at the same times.

Ascholten
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Thanks Rechen. Where is this

Thanks Rechen. Where is this file located at, the app into file? Granted it's early and I havent had my fill of coffee yet but I was not able to find it.

Thanks
Aaron

If god meant for us not to BOINC he'd have made our #$%^%^ shorter!!

tolafoph
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Look here

astrocrab
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RE: Due to limitations in

Quote:
Due to limitations in the NVIDIA drivers, the Linux version still makes heavy use of the CPU. This will be fixed in Spring 2011, when a new version of the NVIDIA Driver is released.

excuse me, what version are you talking about? 260.xxx and 270.xxx beta are available already.

Oliver Bock
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RE: excuse me, what

Quote:

excuse me, what version are you talking about? 260.xxx and 270.xxx beta are available already.

Well, the 260.xx (CUDA 3.2) drivers exhibit an issue that get's fixed in the next stable driver release (acknowledged/confirmed by NVIDIA). We don't expect our volunteers to run beta drivers (i.e. 270.xx).

Cheers,
Oliver

 


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astrocrab
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so, this high CPU usage under

so, this high CPU usage under CUDA crunching depends not only on drivers?

Oliver Bock
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RE: so, this high CPU usage

Quote:
so, this high CPU usage under CUDA crunching depends not only on drivers?

The root cause is the driver, but there's a workaround in our code that makes it possible to run the code, at all, without crashing. This mandatory workaround leads to the high CPU usage. As soon as NVIDIA released a fixed stable driver we'll remove this workaround, reducing the CPU usage to what's really required.

Keep in mind: this workaround (and driver issue) concerns Linux only!

Oliver

 


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astrocrab
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If ever will be possible to

If ever will be possible to crunch on ATI GPU? if believed to specs it has much more calculating power.

Oliver Bock
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RE: If ever will be

Quote:
If ever will be possible to crunch on ATI GPU? if believed to specs it has much more calculating power.

FYI...

 


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Jeroen_9
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RE: RE: so, this high CPU

Quote:
Quote:
so, this high CPU usage under CUDA crunching depends not only on drivers?

The root cause is the driver, but there's a workaround in our code that makes it possible to run the code, at all, without crashing. This mandatory workaround leads to the high CPU usage. As soon as NVIDIA released a fixed stable driver we'll remove this workaround, reducing the CPU usage to what's really required.

Keep in mind: this workaround (and driver issue) concerns Linux only!

Oliver

NVIDIA has a new driver on their site, version 260.19.36. Would this driver be the one that fixes the above issue or is there a later fix planned by NVIDIA? Thanks.

telegd
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I notice that Ubuntu has the

I notice that Ubuntu has the 270-beta in one of the repos.

However, I think the E@H coders have to rewrite the Linux app for the new driver and they probably won't do that until the new driver is in final form and released officially.

astrocrab
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and what's wrong with mac?

and what's wrong with mac? there is still no gpu app for it.

Bikeman _Heinz-Bernd Eggenstein_
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I think it's wise to wait

I think it's wise to wait until the current cross-validation issues for the CUDA app are completely solved before introducing another platform.

As for the beta driver: Hmm... I'm not sure whether this beta already contains the fix for the driver problem. I'll check.

If so....hmm....maybe it would be a nice idea to release an app that could be triggered to disable the driver-bug workaround, e.g. by creating a special named file in the BOINC E@H project directory as was done for the GW app to enable some debugging features iirc. This way, those who are brave enough to use a beta driver could already beta-test the Linux app in the state it will be for the new official driver.

Oliver, what do you think?

CS
Heinz

astrocrab
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RE: I notice that Ubuntu

Quote:
I notice that Ubuntu has the 270-beta in one of the repos.

which repo? i can't find this new 270 and my gtx 560 doesn't work without it ((

Mike Kubanek
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I just read the announcement

I just read the announcement that the new software will basically use the Nvidia GPU, I have a lot of host processors, but very few Nvidia GPU's, are my systems now obsolete, or have I misunderstood the message. I would like to continus to help out, but if all your using are the Nvidia, then I don't have the right configurations for this work any longer. I must be reading something wrong, others would have mentioned this as well?
Mike

Mike Kubanek

Bikeman _Heinz-Bernd Eggenstein_
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RE: I just read the

Quote:
I just read the announcement that the new software will basically use the Nvidia GPU, I have a lot of host processors, but very few Nvidia GPU's, are my systems now obsolete, or have I misunderstood the message. I would like to continus to help out, but if all your using are the Nvidia, then I don't have the right configurations for this work any longer. I must be reading something wrong, others would have mentioned this as well?
Mike


Don't worry, both searches (S5GC1HF and BRP3) continue to support non-GPU hosts under Linux, Windows and Mac OS X.

CU
HB

Ver Greeneyes
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On the other hand, using a

On the other hand, using a GPU greatly speeds up the Binary Radio Pulsar Search WUs - on my middling GeForce 250 GTS, the completion time drops to ~90 minutes compared to over 15 hours for my Q9450 @ 3.2 GHz. Of course, the CPU can do 4 WUs at the same time, but even then it's a big difference.

astrocrab
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RE: I'm not sure whether

Quote:
I'm not sure whether this beta already contains the fix for the driver problem. I'll check.
...
This way, those who are brave enough to use a beta driver could already beta-test the Linux app in the state it will be for the new official driver.
Heinz

i'm ready to test. i have at least two gtx 560 and its performance in E@H greatly depends on main CPU speed =( this is sad, i can't run GPUs at full throttle.

astrocrab
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RE: RE: If ever will be

Quote:
Quote:
If ever will be possible to crunch on ATI GPU? if believed to specs it has much more calculating power.

FYI...

thank you, but it is S@H related, not E@H.
what about E@H on ATI?

Oliver Bock
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RE: RE: RE: If ever

Quote:
Quote:
Quote:
If ever will be possible to crunch on ATI GPU? if believed to specs it has much more calculating power.

FYI...

thank you, but it is S@H related, not E@H.
what about E@H on ATI?

Sorry, I meant to quote this posting of mine...

 


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Oliver Bock
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RE: and what's wrong with

Quote:
and what's wrong with mac? there is still no gpu app for it.

We see different issues on the Mac. We and NVIDIA still have to investigate this further...

Thanks for your patience,

Oliver

 


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Oliver Bock
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RE: I think it's wise to

Quote:

I think it's wise to wait until the current cross-validation issues for the CUDA app are completely solved before introducing another platform.

As for the beta driver: Hmm... I'm not sure whether this beta already contains the fix for the driver problem. I'll check.

If so....hmm....maybe it would be a nice idea to release an app that could be triggered to disable the driver-bug workaround, e.g. by creating a special named file in the BOINC E@H project directory as was done for the GW app to enable some debugging features iirc. This way, those who are brave enough to use a beta driver could already beta-test the Linux app in the state it will be for the new official driver.

Oliver, what do you think?

CS
Heinz

I'll check the driver. If all works out well we could release an unofficial/beta version of our Linux app that doesn't contain the existing workaround and thus would use as less of a CPU core as possible.

Cheers,
Oliver

 


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Oliver Bock
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Update: I checked the

Update: I checked the 260.19.36 as well as the 270.18 beta driver. While the first doesn't fix the issue (as expected) the latter does. Well, at least in a first test run that still needs to finish... If all turns out fine we might publish an unofficial release of our Linux 32-bit app that relies on this new driver. You are free to install and run the new driver/app combo manually as you please (using an appropriate app_info.xml file).

Stay tuned for more...

Cheers,
Oliver

 


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Markus_46
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and wat s happend if you use

and wat s happend if you use a ATI Radeon?

Michael Karlinsky
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RE: and wat s happend if

Quote:
and wat s happend if you use a ATI Radeon?

Only NVIDIA is supported here ATM.

Michael

astrocrab
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RE: If all turns out fine

Quote:
If all turns out fine we might publish an unofficial release of our Linux 32-bit app

That's great! but shall it run on 64 bit linux?

Oliver Bock
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RE: RE: If all turns out

Quote:
Quote:
If all turns out fine we might publish an unofficial release of our Linux 32-bit app

That's great! but shall it run on 64 bit linux?

Sure, just install the usual 32-bit compatibility libs (should come in a (meta-)package with your distribution).

Oliver

 


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SilentRAIDg
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I have to Disable my SLI

I have to Disable my SLI feature otherwise my computer lags and sticks when working with any desktop Application. My specs are :

EATX Tyan S2915-E Thunder Motherboard
2x Opteron 2352 Socket F Quadcore CPUs
8Gb Micron RAM
2x GeForce 9600GT SSC GPUs
Win7 Ultimate x64

Any suggestions?

Bruce Allen
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RE: what about E@H on

Quote:
what about E@H on ATI?

For ATI GPU cards, we are working on an OpenCL version of the Einstein@Home Radio Pulsar Search application. I am optimistic that this will be available later in 2011, but substantial work is still needed to complete an efficient OpenCL port.

astrocrab
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we urgently need for a new

we urgently need for a new linux version (even beta) without bug to open a whole potential of our gpus =)

telegd
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RE: RE: I notice that

Quote:
Quote:
I notice that Ubuntu has the 270-beta in one of the repos.

which repo? i can't find this new 270 and my gtx 560 doesn't work without it ((


It is in the x-swat ppa found here:
https://launchpad.net/~ubuntu-x-swat/+archive/x-updates

Caution - I have not tested it myself. I am very careful about upgrading my Nvidia drivers unless necessary. Even more so about beta versions.

It is great news that the 270 series might fix our problem, though. I look forward to hearing more!

Bikeman _Heinz-Bernd Eggenstein_
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Hi! Experienced Linux

Hi!

Experienced Linux users can look here for new NVIDIA drivers:

(64 bit)
ftp://download.nvidia.com/XFree86/Linux-x86_64/

(32 bit)
ftp://download.nvidia.com/XFree86/Linux-x86/

where you will also find the 270 beta driver.

Those installers are not distribution specific and the installer might need to actually compile the kernel module by itself, so you will need a development environment (C compiler etc) installed, see the README. So if you can get a driver from the package manager of your distribution ==> get it from there :-). If you want to try out the latest beta, you might want to try the NVIDIA site.

I tried this on OpenSuse 11.2 and it looks promising so far. Knock on wood.

CU
HB

astrocrab
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on ubuntu 10.10 we have this

on ubuntu 10.10 we have this beta for several weeks already )
all we need now is new linux cuda app without 260 bug ))

telegd
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RE: I tried this on

Quote:
I tried this on OpenSuse 11.2 and it looks promising so far. Knock on wood.


Me too. I finally installed the 270.18 beta on Kubuntu (Mint) 10.04 and it seems to behaving well on the 1.06 BRPS Work-Units.

It does not seem to have fixed all of the cross-validation problems, though:
http://einsteinathome.org/workunit/93182449

Bikeman _Heinz-Bernd Eggenstein_
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RE: RE: I tried this on

Quote:
Quote:
I tried this on OpenSuse 11.2 and it looks promising so far. Knock on wood.

Me too. I finally installed the 270.18 beta on Kubuntu (Mint) 10.04 and it seems to behaving well on the 1.06 BRPS Work-Units.

It does not seem to have fixed all of the cross-validation problems, though:
http://einsteinathome.org/workunit/93182449

The cross validation problem is not a driver issue, it will be fixed with the next app version. There's good progress on this problem, but that's a different topic.

As for the 270 driver: It runs flawlessly on my 16 bit Suse 11.2 box, but I got hanging CUDA apps since updating the driver on my 64 bit Linux box.

Does anybody see the same on a 64 bit Linux w/ 270 driver? I would not be surprised to see bugs like this in an early beta driver, so everybody giving this driver a try obviously should monitor the host closely.

CU
HB

Jeroen_9
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RE: The cross validation

Quote:


The cross validation problem is not a driver issue, it will be fixed with the next app version. There's good progress on this problem, but that's a different topic.

As for the 270 driver: It runs flawlessly on my 16 bit Suse 11.2 box, but I got hanging CUDA apps since updating the driver on my 64 bit Linux box.

Does anybody see the same on a 64 bit Linux w/ 270 driver? I would not be surprised to see bugs like this in an early beta driver, so everybody giving this driver a try obviously should monitor the host closely.

CU
HB

I built driver 270.18 for my 64-bit Linux box yesterday. So far the CUDA app has been running stable. I'll keep an eye on it to see if the CUDA hang shows up on my system.

Bikeman _Heinz-Bernd Eggenstein_
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Thanks! I got the

Thanks!

I got the impression that tasks hang only if started with run_client in the background without an actice X desktop, bute rarely if ever stall when started with run_manager and BOINC manager open. Just a first impression, tho.

CU

HB