What's the Difference

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Aurum
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Message 1465 - Posted: 11 Dec 2019, 16:58:45 UTC

What does the "t" signify in yafu-4t and yafu-32t ???
How does one choose the number of CPUs for each type of yafu WU ???
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Message 1473 - Posted: 25 Dec 2019, 20:55:30 UTC - in response to Message 1465.  
Last modified: 25 Dec 2019, 20:55:46 UTC

What does the "t" signify in yafu-4t and yafu-32t ???
How does one choose the number of CPUs for each type of yafu WU ???
Yo YoYo are you there???
Doesn't anybody know the answer???
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Message 1474 - Posted: 25 Dec 2019, 23:29:16 UTC

If you want to attempt to tame this beast put this in your app_config:
<app_config>
    <app>
        <name>yafu-32t</name>
        <max_concurrent>1</max_concurrent>
    </app>
    <app_version>
        <app_name>yafu-32t</app_name>
        <plan_class>32t</plan_class>
        <avg_ncpus>32</avg_ncpus>
        <cmdline>--nthreads 32</cmdline>
    </app_version>
</app_config>
Then restart it:
/etc/init.d/boinc-client restart
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Message 1475 - Posted: 26 Dec 2019, 21:36:28 UTC - in response to Message 1474.  

4t is thought to run on 4 threads
8t on 8 threads
and so on.
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Message 1476 - Posted: 29 Dec 2019, 0:24:50 UTC - in response to Message 1475.  

The big ones use every core they can find if not constrained.
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Message 1546 - Posted: 23 Dec 2020, 16:03:04 UTC - in response to Message 1476.  

The big ones use every core they can find if not constrained.


So are you saying I need a 16 or 32 core machine to run the 16 and 32 core workunits? I know how to constrain them thru the settings but am asking as I do not own a 32 core machine.
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Message 1549 - Posted: 30 Dec 2020, 15:56:18 UTC

I think the answer is "yes" Mikey.
A 1950X will use all 32 threads to crunch a 32t task.

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Message 1552 - Posted: 19 Jan 2021, 14:51:44 UTC - in response to Message 1549.  

I think the answer is "yes" Mikey.
A 1950X will use all 32 threads to crunch a 32t task.


I figured that but am wondering if I NEED a 32 thread machine to crunch them? Can I for example fudge the numbers and use a 24 thread to make it THINK I have a 32 thread pc or do I even need too.
The short answer is I can't seem to get any of the 32 thread tasks and me not having a 32 thread machine seems to mean I will never run them.
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Message 1553 - Posted: 19 Jan 2021, 19:05:14 UTC - in response to Message 1552.  

The 16t and 32t Tasks are not just for fun 16t or 32t Tasks. They can be very cpu consuming, means they can run 2 days on 32 cores. So if you run them on just 8 cores they will run very long.

But on every system you can fake the number of cores BOINC sees. On a 8 core system you can state there are e.g. 60 cores and BOINC will handle it as there are 60 cores.

See ncpus here https://boinc.berkeley.edu/wiki/Client_configuration
.
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Message 1580 - Posted: 29 Sep 2021, 22:28:29 UTC

I just gave up on a 32T task after it had been running for nearly 7 days, 3 of which it sat at 100%.
I could see the task in my task manager and it was using about 4% of my CPU. After I restarted BOINC, the task restarted at about 76% complete and the 7 days disappeared to be replaced with about 8hrs. After I left it over night, then aborted it.
7 days locking up 32 threads is just a bridge too far.

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