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drummers-lowrise
1) Message boards : AP26 - AP27 Search : AP27 Closing??? (Message 133450)
Posted 148 days ago by GregCinAZProject donor
If the software can't do an AP29, is an AP28 possible? If so, I vote we keep going. There are more AP27s out there still. Just sayin'.
2) Message boards : Fermat Divisor Search : Fermat Divisor Search (Message 132608)
Posted 173 days ago by GregCinAZProject donor
Is this one of the LLR projects that does better MT, or better as single-threaded?


The preferences page is recommending MT.
3) Message boards : Number crunching : Better multi-threading (Message 132541)
Posted 177 days ago by GregCinAZProject donor
Working perfectly for me now, once new tasks were downloaded. Easy to tweak without app_config. Thanks!!
4) Message boards : Number crunching : Better multi-threading (Message 132404)
Posted 184 days ago by GregCinAZProject donor
Another newbie question: can/will we be able to ditch app_config?

For the majority of users, yes.

But if you want some more granular control (say, set up different thread counts for each subproject once and never deal with it again) or add extra flags like -no_avx512 when it gets implemented, you will still need to use app_config.


Super, thank you kindly!!
5) Message boards : Number crunching : Better multi-threading (Message 132402)
Posted 184 days ago by GregCinAZProject donor
Another newbie question: can/will we be able to ditch app_config?
6) Message boards : Number crunching : Better multi-threading (Message 132383)
Posted 184 days ago by GregCinAZProject donor
Ah, something I forgot to ask: How would the MAX-JOBS and MAX-CPUs be set if I want to run, say, a single SOB across all 8 cores at the same time?
7) Message boards : Number crunching : Better multi-threading (Message 132381)
Posted 184 days ago by GregCinAZProject donor
When you select the number of tasks you want to do (I see it ranges from 1-256), is it done on a First In, First Out basis? For example:

I want to download 4 workunits.
I want to dedicate 8 cores to the job.

Is it split so that it's 2 workunits per 4 cores, or just one at a time working across all 8 cores (one finished, the next one is downloaded)?



Assuming that your computer has 8 cores:

The MAX_CPUs=8 setting will cause it to run -t8 tasks.

The MAX_JOBS=4 setting won't have any effect, because on an 8 core machine, if the tasks consume 8 cores each, you can only run 1 job at a time. It will (or should1) download a single task to run on all 8 cores.


Assume that the computer has 4 cores:

The MAX_CPUs=8 setting will cause it to run -t4 tasks, because there's only 4 cores in the computer.

The MAX_JOBS=4 setting won't have any effect because you can only run one 4-core job at a time.


Assume that the computer has 64 cores:

The MAX_CPUs=8 setting will cause it to run -t8 tasks.

Normally, BOINC could run eight 8-cores tasks on a 64 core machine, but the MAX_JOBS=4 setting will cause it to only run 4 tasks at once.


Now, you said you want to "download four tasks". These controls affect how BOINC runs the tasks. It does not directly affect how many are downloaded. That's controlled primarily by the settings in the BOINC client for how many days of work to download.

1I say "should", because BOINC sometimes downloads more tasks than it should.


Thank you! This answers my questions and hopefully a few other folks'.
8) Message boards : Number crunching : Better multi-threading (Message 132379)
Posted 184 days ago by GregCinAZProject donor
When you select the number of tasks you want to do (I see it ranges from 1-256), is it done on a First In, First Out basis? For example:

I want to download 4 workunits.
I want to dedicate 8 cores to the job.

Is it split so that it's 2 workunits per 4 cores, or just one at a time working across all 8 cores (one finished, the next one is downloaded)?
9) Message boards : Problems and Help : How to only download one WU at a time? (Message 131494)
Posted 215 days ago by GregCinAZProject donor
Where can I find the cache area? If you mean the computing preferences, I have it set to store 0.0 additional work; also in global. Still don't understand why it will only download one Genefer at a time, but for LLR it brings down 3, two of which sit idle until the first LLR has completed.
10) Message boards : Problems and Help : How to only download one WU at a time? (Message 131492)
Posted 215 days ago by GregCinAZProject donor
Actually, I don't got it. Original question still stands.


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