Much slower processing with SETI@home ver 4.5

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John McLeod VII
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Message 32233 - Posted: 2 Oct 2004, 23:34:51 UTC - in response to Message 32206.  

> Hi All,
> I have been reading the post here and began wondering if it was not
> intentional to make the pdb file to include the debugging code because of the
> problems they have had with software, they now have the ability to track
> crashes they can't watch or determine how happen. IMO I would rather see the
> debugging in the program and our files to take longer, if it keeps the project
> active without "hiccups".
> Again I am not from a computer background and I am trying to understand.
> If I understand correctly the pdb. file is longer because it includes the
> debugging code, so wouldn't that make the WU's process more slowly because
> they have additional code "Reviewing" the process.
>
> Thank You In Advance.
>
> Have A Great Day And A Better Tomorrow!
>
> Rocky Cudd

BETA lived through stack walker releases of the code. These took 10 times as long as normal, not just a little longer. There are high angle and low angle WUs that take different amounts of time (I can't remember which is which at the moment). Perhaps we have some of the other type for a while.

In any case the credit is granted based on CPU time, not on WU count.
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Profile Misfit
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Message 32235 - Posted: 2 Oct 2004, 23:44:12 UTC

Well I still have about 6 days of setiathome 4.03 WU's cached so if this version is really crunching faster I'll wait until I run out before upgrading.
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eberndl
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Message 32245 - Posted: 3 Oct 2004, 0:47:16 UTC

You only upgrade the BOINC core manually; all the clients update as needed the next time you contact the server to d/l units. So I'd say you'll be upgrading in 6 days or less =-)


<br />

Feel free to take a look inside my brain
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Message 32258 - Posted: 3 Oct 2004, 1:38:20 UTC - in response to Message 31808.  

> Has anybody else noticed -- my processing times per work unit have almost
> doubled since the upgrade to SETI@home ver 4.5. Can anybody explain why?
>
>

Which AV have you got? I know the latest Mcafee and lBoinc 4.10 and Boinc 4.11 dont get on. It may apply to other AV progs and latest Boincs too. No probs with Boinc 4.09 and Mcafee. Suggest you go back to Boinc 4.09 and check. If you are using that one anyway, check to see what is using the most processing time. It may be Seti and your AV are going off at each other.
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Message 32263 - Posted: 3 Oct 2004, 1:59:00 UTC

Crunching 30 - 40 percent longer per WU is fine, if it's for debugging or more intense computations. But crunching 30 - 40 percent longer because of a compile error or untested software is a waste of energy. I hope it's the former.
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Profile Mike Special Project $75 donor
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Message 32274 - Posted: 3 Oct 2004, 4:52:02 UTC

Hi

AMD Athlon 2800+ nforce2 512MB dual Ram Win XP home.
Seti 4.03 2.3 houres.
Seti 4.05 4.1 houres.

very heavy.

greetz Mike

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Profile mlcudd
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Message 32282 - Posted: 3 Oct 2004, 5:47:05 UTC - in response to Message 32233.  
Last modified: 3 Oct 2004, 5:56:17 UTC

> BETA lived through stack walker releases of the code. These took 10 times as
> long as normal, not just a little longer. There are high angle and low angle
> WUs that take different amounts of time (I can't remember which is which at
> the moment). Perhaps we have some of the other type for a while.
>
>Hi John,
I appreciate your response, and I had some additional questions. We know that credit is based upon CPU time, but wouldn't our credit basically be the same as it is now since everyone has the 4.05 core? I was just thinking that alot of people are recieving small amounts of credit for many workunits being done, but if my thinking is correct even though the units take longer to process,credit will still average out in the long run? Like a bigger piece of credit for fewer WU's.

Thanks Again.

Happy Crunching!

Warm Regards,

Rocky Cudd

P.S. I forgot one thing, my slow box (Genuine Intel Pentium Microsoft Windows Millennium , (04.90.3000.00) was doing workunits at 12.25 hours each, they now run at 24.66 hours each.A tad more than double. My fastest box that runs the AMD Athlon, normally does a WU in 4.35 hours, now in 5.93, and finally my third box with a 2,8 Intel celeron was running at 5.37 hours each and now they run at 7.88 hours. Are the differences in the amount of time each one takes to process still due to how the processors caches handle the WU?

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Profile Crunch3r
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Message 32334 - Posted: 3 Oct 2004, 13:50:39 UTC - in response to Message 32282.  

> > BETA lived through stack walker releases of the code. These took 10
> times as
> > long as normal, not just a little longer. There are high angle and low
> angle
> > WUs that take different amounts of time (I can't remember which is which
> at
> > the moment). Perhaps we have some of the other type for a while.
> >
> >Hi John,
> I appreciate your response, and I had some additional questions. We know that
> credit is based upon CPU time, but wouldn't our credit basically be the same
> as it is now since everyone has the 4.05 core? I was just thinking that alot
> of people are recieving small amounts of credit for many workunits being done,
> but if my thinking is correct even though the units take longer to
> process,credit will still average out in the long run? Like a bigger piece of
> credit for fewer WU's.
>
> Thanks Again.
>
> Happy Crunching!
>
> Warm Regards,
>
> Rocky Cudd
>
> P.S. I forgot one thing, my slow box (Genuine Intel Pentium Microsoft Windows
> Millennium , (04.90.3000.00) was doing workunits at 12.25 hours each, they now
> run at 24.66 hours each.A tad more than double. My fastest box that runs the
> AMD Athlon, normally does a WU in 4.35 hours, now in 5.93, and finally my
> third box with a 2,8 Intel celeron was running at 5.37 hours each and now they
> run at 7.88 hours. Are the differences in the amount of time each one takes to
> process still due to how the processors caches handle the WU?
>
> src="http://boinc.mundayweb.com/cpdn/stats.php?userID=380&trans=off">
>

There is seriously something going on in the wrong direction. I´ve got a lot of problems with boinc 4.09 wich stops processing and 4.10 even crashed several of my machines here.
Processing a WU with seti 4.05 on my dual pIII 500 went from 11h to 21h that can´t be true.

So i think somebody (Rom) should explain us what happend and why.
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Profile Siran d'Vel'nahr
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Message 32335 - Posted: 3 Oct 2004, 14:03:00 UTC - in response to Message 31808.  
Last modified: 3 Oct 2004, 14:05:52 UTC

> Has anybody else noticed -- my processing times per work unit have almost
> doubled since the upgrade to SETI@home ver 4.5. Can anybody explain why?
>
>

Hi Keith,
This is rather reminiscent of what I noticed over at "Classic" SETI back in '99 or '00. They came out with an upgrade and my WU more than doubled in processing time. I don't remember if I was still running my 486 or if I was running the Pentium 166 at that time. But, I thought it was very weird. Fortunately, for now, I'm still running v4.03 SETI client with v4.09 core client. I still have quite a number of WUs needing v4.03.

L8R....

---




Rick A. - BOINCing right along now.... It can only get better!

"There is no fate except that which we create for ourselves."

Live Long and Prosper....
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Message 32366 - Posted: 3 Oct 2004, 18:02:27 UTC

With BOINC ver. 4.09 and setiathome 4.05, work units are processing in about 3 hrs. 10 mins. rather than about 2 hrs. 20 mins. as they did with previous versions. This is on a Pentium 4 3.0 GHz, 1 GB RAM, HT off, Windows XP.

Rocky

<a> [/url]
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Message 32485 - Posted: 4 Oct 2004, 2:26:49 UTC

If I remember correctly about the time Seti went live, back on the Beta project there was a success rate of about 80%. In other words about 20% of the work units failed with an error. They are probably the work units that complete in under 5 minutes. Now the debug code has been put back in along with the PDB file in order to further debug the failing work units. Hence the longer times to complete a work unit. After this is done and a satisfactory update issued I would say that the debug code would be removed and we would be back to normal crunch times. This seems like a good thing to me. Since everyone is crunching at the longer times no one person is penalized. Only difference is that it takes more time and therefore requests more credit than would be normal for the completed work units.

Flame proof suit ready for your reply's.
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Message 32498 - Posted: 4 Oct 2004, 3:26:25 UTC - in response to Message 32485.  
Last modified: 4 Oct 2004, 3:28:11 UTC

> If I remember correctly about the time Seti went live, back on the Beta
> project there was a success rate of about 80%. In other words about 20% of
> the work units failed with an error. They are probably the work units that
> complete in under 5 minutes. Now the debug code has been put back in along
> with the PDB file in order to further debug the failing work units. Hence the
> longer times to complete a work unit. After this is done and a satisfactory
> update issued I would say that the debug code would be removed and we would be
> back to normal crunch times. This seems like a good thing to me. Since
> everyone is crunching at the longer times no one person is penalized. Only
> difference is that it takes more time and therefore requests more credit than
> would be normal for the completed work units.
>

So why there no official word on this (that I can see). Any person running a client that doesnt check here is likely to think something is wrong with their setup or system. A simple one line on the home page to inform users that debugging is back is all it takes.

Lets not get back to the mushroom farm mentality (ie keep everyone in the dark) the SETI team was just starting to shake off.



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Message 32572 - Posted: 4 Oct 2004, 9:55:49 UTC

I think that we are "cooking from water" ...
We are comparing 2 different version of the worker client sofware and 2 differnet WU's. It is wrong, I think.
If something changed in client worker from 4.03 to 4.05 AND something changed in WU's then the result time is different. And something changed in both, for sure, since 4.03 WU's MUST be proceed with 4.03 worker client.
Crunch timing chnaged alreay a few times in SETI classic, somebody already mentioned it here.
I don't think that something is wrong. CPDN takes 465 hours to complete. My box made 50 hours of CPDN till now and still only 7.33% completed.
And one thing, reported time is reported by client, did anybody check it on watches Is that reported time right one? Was it reported right before?
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Message 32576 - Posted: 4 Oct 2004, 11:03:17 UTC - in response to Message 31826.  

> My processing time on a pentium 4 3.2 went from 3.5 hours on the 4.3 units to
> 5 hours on the first 4.5 unit I downloaded to 6 hours on the second 4.5 unit I
> just crunched. Granted my processor is hyperthreaded and I am doing two wu's
> at once but it slowed way down since the upgrade. Plus, the wu keeps going
> when it says 100.000% done.
>
>


Good to know someone else has the same specs as me - 3.2Ghz P4 HT, WU's took about 3.5 hours and now take 5 hours 20 minutes on Seti v4.05. Also, I have noticed that the WU's keep crunching for about 10 minutes after the status bar reaches 100% complete. Prolly just a minor bug in calculating completion time.

I suspect that Seti v4.05 is performing more calculations on each WU than previous versions (better science). Rock on!


<a>
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Message 32578 - Posted: 4 Oct 2004, 11:09:48 UTC

I've had WU's (26ap04aa...) running on Seti 4.05 that have taken exactly the same time than with 4.03 (3:44 on P4 2.6GHz). The latest WU's I've got (04mr04aa...) are now taking about 4:44. So I think that the WU's are causing the longer calculation times, not the version of SETI@home.
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Message 32587 - Posted: 4 Oct 2004, 12:49:47 UTC

It would be nice if there was a bench mark WU that is re-issued for each version of the Seti client that can be used to optimise systems and make sure they are working correctly, it would also remove the question of is the WU the cause of the longer completion times or is it the version.

Anthony

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Message 32594 - Posted: 4 Oct 2004, 13:28:28 UTC

Another simple solution would be SETI telling us what's going on ?!?
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Message 32596 - Posted: 4 Oct 2004, 13:32:30 UTC - in response to Message 32594.  

> Another simple solution would be SETI telling us what's going on ?!?
>
>

What drugs are you on, considering such a simple solution ;)



greetz, Uli
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Message 32599 - Posted: 4 Oct 2004, 13:34:53 UTC - in response to Message 32587.  

> It would be nice if there was a bench mark WU that is re-issued for each
> version of the Seti client that can be used to optimise systems and make sure
> they are working correctly, it would also remove the question of is the WU the
> cause of the longer completion times or is it the version.
>
> Anthony
>
> <img> src="http://boinc.mundayweb.com/seti2/stats.php?userID=1580&trans=off">
>

Try this :

1) Download the seti application source code archive (eg zip file).
2) In the \seti_boinc\client\test_workunits\ directory is a file called reference_work_unit.sah
3) Create two new directories called for example \seti403 and \seti405
4) Copy the reference work unit to each new directory calling it work_unit.sah
5) Copy the relevant seti 4.03 and 4.05 executables and .pdb files to each new directory
6) Ensuring that you run eactly the same test conditions eg hyperthreading off, no other programs running etc, run each executable in turn noting how long it takes.

7) Compare run times and stop whinging !

8) Repeat for each new version of the seti client as it comes out...

The Weasel
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Message 32621 - Posted: 4 Oct 2004, 14:46:21 UTC

Yup . . . slow like a snail

It took me metween 2:20 and 2:38 to complete one WU and now it takes up to 4:20
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Message boards : Number crunching : Much slower processing with SETI@home ver 4.5


 
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