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21) Message boards : Generalized Fermat Prime Search : GFN22: 1080Ti vs. TitanZ (Message 107799)
Posted 1673 days ago by Profile Tuna Ertemalp
hostid=505815&offset=0&show_names=0&state=4&appid=17[/url] for valid gfn22 on this machine. After a driver update recently, double precision turned off for a while which I then turned on again. Seems the times went down from 300K+ to 200K+.

Tuna



I'm confused by the sentence structure... are you saying the times were lower with DP on or with DP off?


Sorry, was in my Dr Office, waiting, typing hurriedly. :)

DP on was faster.
22) Message boards : Generalized Fermat Prime Search : GFN22: 1080Ti vs. TitanZ (Message 107794)
Posted 1673 days ago by Profile Tuna Ertemalp
So, I have this machine with two TitanZ cards, which means 4 GPUS, all with DoublePrecision=ON, running roughly at 750-800Mhz, and that is the machine I let GFN22 use the GPUs exclusively.


With the Titan Z, do you get better n=22 speeds with DP on or off?


See http://www.primegrid.com/results.php?hostid=505815&offset=0&show_names=0&state=4&appid=17 for valid gfn22 on this machine. After a driver update recently, double precision turned off for a while which I then turned on again. Seems the times went down from 300K+ to 200K+.

Tuna
23) Message boards : Generalized Fermat Prime Search : GFN22: 1080Ti vs. TitanZ (Message 107789)
Posted 1673 days ago by Profile Tuna Ertemalp
So, I have this machine with two TitanZ cards, which means 4 GPUS, all with DoublePrecision=ON, running roughly at 750-800Mhz, and that is the machine I let GFN22 use the GPUs exclusively.

I am going to replace them with four 1080Ti cards (EVGA FTW3), which will run at about 1800-1950Mhz, but there is no DoublePrecision setting in the NVidia settings for 1080Ti.

What kind of perf should I expect after this change? Same, worse, better?

I will also be replacing a number of (previous generation) TitanX cards in other hosts with factory overclocked 1080Ti cards (EVGA SC/Hybrid, SC2/Hybrid, FTW3), so I will end up with bunch of Xs and these two Z cards, unused, destined to resale.

Is it worth keeping those TitanZs in my lesser hosts that currently have old GPUs like 580/480/8600 etc., and continue GFN22 on them, or should I replace those old cards with the soon-to-be-spare Xs and use them for general purpose crunching (PG, plus all other BOINC projects using GPUs)?

In short, is there a value in keeping the Zs alive?

Thanks
Tuna
24) Message boards : Generalized Cullen/Woodall prime search : GCW-LLR is now open! (Message 107601)
Posted 1680 days ago by Profile Tuna Ertemalp
Thank you both!


I posted this as a summary: http://www.primegrid.com/forum_thread.php?id=7348&nowrap=true#107600

I hope I didn't screw up something...

Tuna
25) Message boards : Number crunching : LLR 3.8.20 Going Live! (Message 107600)
Posted 1680 days ago by Profile Tuna Ertemalp
Combining few posts in another thread:

http://www.primegrid.com/forum_thread.php?id=7415&nowrap=true#107580
http://www.primegrid.com/forum_thread.php?id=7415&nowrap=true#107589
http://www.primegrid.com/forum_thread.php?id=7415&nowrap=true#107592
http://www.primegrid.com/forum_thread.php?id=7415&nowrap=true#107594
http://www.primegrid.com/forum_thread.php?id=7415&nowrap=true#107595

I created the below that I am now using on all of my 4/8/12/16 thread hosts.

Note that you cannot use it as-is; some minimal editing is required. You will need to:

1) Totally exit BOINCMgr (not just minimize!)
2) Create a {BOINCDataFolder}\projects\www.primegrid.com\app_config.xml, copy/paste this into it, and then ReplaceAll "NumProcs" with whatever value you want it to be. If you decide to give different NumProcs to different apps, then make sure to realize that each app occurs twice in this file, and to make sure each pair is consistent with each other.
3) Restart BOINCMgr

Also, when you restart BOINCMgr, you might get bunch of errors/warnings about stuff like "Your app_config.xml file refers to an unknown application 'llrSOB'. Known applications: 'pps_sr2sieve', 'ap26', 'llrPSP', 'llrTPS', 'trp_sr2sieve', 'llrPPSE', 'llrWOO', 'llrCUL', 'genefer', 'llrPPS', 'llrSR5', 'llrMEGA', 'gcw_sieve', 'llrGCW'". These are ignorable. All that means is that your host is probably set to receive tasks only from a subset of projects, which you probably manually handpicked using http://www.primegrid.com/prefs.php?subset=project, therefore to that host, not all projects are known. BOINCMgr just reports this, ignores it, and uses whatever is useful to it.

I am sure I will stand corrected if I made a mistake. There are a few warnings about doing this both in this thread as well as Michael's http://www.primegrid.com/forum_thread.php?id=7415&nowrap=true#107595. So, be careful. For now, I max'd each out on all my hosts. I'll see over time if that was deadly...

Tuna

<app_config> <app> <name>llrGCW</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrGCW</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrWOO</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrWOO</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrCUL</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrCUL</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrPSP</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrPSP</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrSOB</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrSOB</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrTRP</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrTRP</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrSR5</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrSR5</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> <app> <name>llrESP</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrESP</app_name> <cmdline>-t NumProcs</cmdline> <avg_ncpus>NumProcs</avg_ncpus> </app_version> </app_config>
26) Message boards : Generalized Cullen/Woodall prime search : GCW-LLR is now open! (Message 107596)
Posted 1680 days ago by Profile Tuna Ertemalp
Thank you both!
27) Message boards : Generalized Cullen/Woodall prime search : GCW-LLR is now open! (Message 107592)
Posted 1680 days ago by Profile Tuna Ertemalp
Does anyone have a working app config they could post to run GCW-LLR with four threads?


Here you go. Note that most people also put a <max_ncpus> tag in there, but that's an error. Max_ncpus is not used and is ignored. The correct tag is avg_ncpus.

<app_config> <app> <name>llrGCW</name> <fraction_done_exact/> <max_concurrent>1</max_concurrent> </app> <app_version> <app_name>llrGCW</app_name> <cmdline>-t 4</cmdline> <avg_ncpus>4</avg_ncpus> </app_version> </app_config>


Don't forget to restart BOINC after creating the app_config.xml file.


Michael, this is awesome. Thanks! I was just gonna make time this morning to read through the lengthy http://www.primegrid.com/forum_thread.php?id=7348, and create my own, but this helps a bunch! I guess one remaining question would be, although unrelated to this thread: What other app names could be used to replace llrGCW above in the app_config.xml? In other words, what other apps can take in a "-t n" param that are currently active?
28) Message boards : Generalized Cullen/Woodall prime search : GCW-LLR is now open! (Message 107503)
Posted 1683 days ago by Profile Tuna Ertemalp
Another question: Under http://www.primegrid.com/show_badges.php?userid=388469, I don't see a GCW LLR line. Yes, I don't have any badge right now since none of my tasks completed. I don't know if that is the reason, or just that the new project didn't make it to that page, yet. If the former, I think there is value in listing the projects in there for which the user has no badge, but has tasks in progress and/or pending credits. The CurrentCredit and CurrentBadge would be blank, but all other fields would have useful info.
29) Message boards : Generalized Cullen/Woodall prime search : GCW-LLR is now open! (Message 107500)
Posted 1683 days ago by Profile Tuna Ertemalp
Thank you guys. I got my answer... ;)
30) Message boards : Generalized Cullen/Woodall prime search : GCW-LLR is now open! (Message 107497)
Posted 1683 days ago by Profile Tuna Ertemalp
Why is there only a "Recent average CPU time: 0:00:00" on http://www.primegrid.com/prefs.php?subset=project when I look at the project while editing my setings?


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