Wrong Core Parameter on 8t WUs?

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Matthias Lehmkuhl

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Message 1606 - Posted: 29 May 2022, 8:59:02 UTC

I got this WU which should run on 8 cores
https://yafu.myfirewall.org/yafu/result.php?resultid=8012392
Projekt yafu
Name yafu_ali_2136852_L134_C131_1652795706_2_2
Anwendung YAFU-8t 134.05 (8t)
Arbeitspaketname yafu_ali_2136852_L134_C131_1652795706_2
Status Aktiv
Erhalten 28.05.2022 09:59:02
Deadline 30.05.2022 19:53:32
...
Verzeichnis slots/4

but when I look at at the BoincTasks core usage I see only 1 core is used
and the stderr.txt too tells that it's using only one thread
10:04:19 (14068): wrapper (7.5.26014): starting
10:04:19 (14068): wrapper: running yafu.exe (-threads 1 -batchfile in)
And in Process Explorer to also saw only 1 process of ecm.exe was running while I checked it yesterday.
Matthias
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Message 1607 - Posted: 30 May 2022, 17:43:37 UTC - in response to Message 1606.  

It runs ecm on all cores. But sometimes one ecm runs a bit longer than the others. But this schould only be some minutes. Afterwards it starts the next ecm run on all cores. After the ecm runs yafu performes some consolidation od the ecm results. This runs also single threaded.
Same for the NFS phase. It runs gnfs in parallel on all cores. The do not finish at the same time. Sometimes on of the gnfs runs needs a bit longer. After also tha last gnfs has finished new gnfs runs are performed on all cores. Also at the end the calculation of the final results is single threaded.

yoyo
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Matthias Lehmkuhl

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Message 1608 - Posted: 30 May 2022, 22:04:52 UTC - in response to Message 1607.  
Last modified: 30 May 2022, 22:05:31 UTC

Hello yoyo,
yes, that is the normal way yafu 8t is running.
But this result was running only one ecm or is now running only one gnfs process each time and the remaining 7 cores are used for tasks of other projects instead yafu 8t is claiming them.

Boinc is running on 8 cores/cpus and this is the actual cpu usage of the boinc projects while my yafu 8t task is running

looks like the image Tag is not working for me, so here also as link to OneDrive
https://1drv.ms/u/s!Apg6sr6l28yehnng4Pso4kpnDYpS?e=UGhl3g
Matthias
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Message 1609 - Posted: 31 May 2022, 5:26:13 UTC

Dou you see the command line of yafu.exe somehow. Does it run with -threads 8?
Some users fiddle with app_info to modify the applikation and forgot about this. Long time later they do not remember about it and wonder why it doesn't run as expected.
Did you do so?
If you don't know detach the project, ensure the project folder is deleted and reattach.

yoyo
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Matthias Lehmkuhl

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Message 1610 - Posted: 31 May 2022, 8:44:03 UTC - in response to Message 1609.  
Last modified: 31 May 2022, 8:46:55 UTC

I found the command line for this result
"yafu.exe" -threads 1 -batchfile in

The previous task on this machine was running normal with 8 cores
based on stderr.txt from older result of this machine
12:27:39 (15320): wrapper: running yafu.exe (-threads 8 -batchfile in)
https://yafu.myfirewall.org/yafu/result.php?resultid=8015475

and I don't have a app_info.xml for yafu in the project folder
Matthias
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mmonnin

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Message 1611 - Posted: 1 Jun 2022, 22:15:06 UTC
Last modified: 1 Jun 2022, 22:16:37 UTC

I agree.

This PC has no app_config and project preferences I have it set to "Max # CPUs 8" yet several PCs are running single threaded unless I make an app_config to set something else.
https://yafu.myfirewall.org/yafu/result.php?resultid=8009237

14:26:12 (72084): wrapper: running yafu (-threads 1 -batchfile in)

CPU time is less than run time and nowhere close to 8x run time.
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Message 1612 - Posted: 2 Jun 2022, 17:27:04 UTC

I changed something in the configuration. Please check if newly downloaded wus are using now 8 threads.

yoyo
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mmonnin

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Message 1613 - Posted: 2 Jun 2022, 21:41:02 UTC - in response to Message 1612.  

I changed something in the configuration. Please check if newly downloaded wus are using now 8 threads.

yoyo


Yes one PC got 2 tasks in the last hour and they are both 8t according to BOINC. Some prior tasks have been using more CPU time than run time. Thanks.
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Profile Beyond

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Message 1614 - Posted: 2 Jun 2022, 23:43:41 UTC - in response to Message 1612.  

I also have six 8t WUs and a 4t WU that are running way too long and show very low CPU usage. Some are sitting at 100% done. Delete them?
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Message 1615 - Posted: 3 Jun 2022, 5:51:09 UTC - in response to Message 1614.  

Yes, abort them.
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[AF>Le_Pommier] Jerome_C2005

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Message 1616 - Posted: 3 Jun 2022, 11:50:59 UTC

Since more than a week I have system issue with never ending tasks


since last week I have canceled other tasks with the same issue, this is running on a i5 8t (so how on earth could it decide to calculate 3 4t tasks ?), they all have *one* gnfs-lasieve (really) running during some time (more than 1 hour) then restarting another one, and loging rows into factor.log, ggnfs.log and (sometimes) stderr.txt so "it looks like they are not really dead" (I had some dead tasks in the past when nothing was written in any log for hours) but now I really don't know what do it, this is now reccurrent (I have canceled similar ones and others are behaving the same over and over).
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Message 1617 - Posted: 3 Jun 2022, 20:07:54 UTC - in response to Message 1616.  

There was a configuration problem which let the workunits only use 1 thread. Therefore many 4t wurkunits are running in parallel. This was fixed, see above in this thread. Now 4t wus should use at least 4 threads.
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[AF>Le_Pommier] Jerome_C2005

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Message 1618 - Posted: 4 Jun 2022, 10:37:25 UTC

The main question was more "how long shall I let them run" then the "too many" problem, especially if you consider each one was only running 1 thread.

Now the 3rd one has terminated after 2 days 7 hours, but the other are still running with 81 and 46 hours of run...

It seems the continue to update the log but with less frequency : more than 4 hours ago for both.

Also now there is another YAFU v134.05 (mt) fully running (all thread) at the same time...

So shall I try to let the 2 remaining 4t terminate ?
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mmonnin

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Message 1619 - Posted: 4 Jun 2022, 15:12:45 UTC

As long as the stderr file is still being written to then I'd leave them running. With the single threaded tasks they can some times take days.
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[AF>Le_Pommier] Jerome_C2005

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Message 1620 - Posted: 4 Jun 2022, 15:57:48 UTC
Last modified: 4 Jun 2022, 15:58:58 UTC

Now the update ratio of the log files seems to be quite low, but still it looks like it is still doing something... only the stderr.txt seems to be updated more often, for both tasks

04/06/2022  07:52 - factor.log
04/06/2022  07:52 - ggnfs.log
31/05/2022  21:21 - session.log
04/06/2022  16:50 - stderr.txt
04/06/2022  07:52 - wrapper_checkpoint.txt

04/06/2022  06:55 - factor.log
04/06/2022  06:55 - ggnfs.log
02/06/2022  09:27 - session.log
04/06/2022  16:50 - stderr.txt
04/06/2022  06:55 - wrapper_checkpoint.txt

and with deadlines that were on 01/06 and 03/06 will they still be considered if they ever return a result ?
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mmonnin

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Message 1621 - Posted: 4 Jun 2022, 17:51:59 UTC - in response to Message 1620.  

Now the update ratio of the log files seems to be quite low, but still it looks like it is still doing something... only the stderr.txt seems to be updated more often, for both tasks

04/06/2022  07:52 - factor.log
04/06/2022  07:52 - ggnfs.log
31/05/2022  21:21 - session.log
04/06/2022  16:50 - stderr.txt
04/06/2022  07:52 - wrapper_checkpoint.txt

04/06/2022  06:55 - factor.log
04/06/2022  06:55 - ggnfs.log
02/06/2022  09:27 - session.log
04/06/2022  16:50 - stderr.txt
04/06/2022  06:55 - wrapper_checkpoint.txt

and with deadlines that were on 01/06 and 03/06 will they still be considered if they ever return a result ?


My client has some tasks with a deadline of June 4th but the project site says the 15th.
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[AF>Le_Pommier] Jerome_C2005

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Message 1622 - Posted: 5 Jun 2022, 10:35:52 UTC

Oh you are right I had not noticed the difference of deadline on my project account, what is June 1st and 3rd on my boinc manager is 11th and 13th here.

However for both task the only file being updated from time to time is stderr.txt (4 hours ago for both) where it adds one "total yield" row, the 2 logs files have not been updated since yesterday morning (my previous screenshot is still valid for these).

I really wonder if it's of any use to let these run, I'd like to see yoyo's opinion on this.
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Message 1623 - Posted: 5 Jun 2022, 19:33:38 UTC - in response to Message 1622.  

The 4t gets task assigned, which are so heavy, that they need 4 cores to finish in 1-2 days.
But a configuration problem on the server lets those workunits only use 1 core.

The additional deadline, which is show on the server allows, that you deliver the results up to 10 days after the deadline and you still will get credits.

So if you fine to NOT get credits for these wus, than you should abort them and you will get workunits which uses all cores. So back to normal processing.
But if you stick to the credits (because the workunit is still running) you can let them run and hope that they will finish in those extra 10 days.

yoyo
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Matthias Lehmkuhl

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Message 1624 - Posted: 5 Jun 2022, 20:49:42 UTC

For me the 10 additional days did work on my 8t task with 1 core running.
The result finished yesterday in the additional time and no new sending of a result for this package was necessary.
Matthias
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[AF>Le_Pommier] Jerome_C2005

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Message 1625 - Posted: 7 Jun 2022, 17:29:02 UTC

The first task did terminated and got (modestly) credited after more than 4 days of calculation.

The second one (4t task) is still running (and has some "extra deadline" to finish yet) but suddenly at some point it decided it should run on 8 available threads (it is a 4t !!!) --> I see 8 gnfs-lasieve process now running in memory

And I know these processes do correspond to *this* running task because
- the slot contains work files dated 01/06, 02/06... and in the log files I see references from 01/06 onwards
- the other 2 tasks sent to me on 5 and 6 June are still pending to run and have 0 crunch time (and not even a slot directory assigned).

Strange isn't it ?
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Message boards : Number crunching : Wrong Core Parameter on 8t WUs?




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