Posts by DoctorNow

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1) Message boards : Generalized Fermat Prime Search : GFN-16 MEGA Prime Search starts March, 14, 2019 (Message 128783)
Posted 1441 days ago by DoctorNow

Optimizing performance

Tasks will took 4-8 hours on modern processors with FMA3 (for a single core). LLR multithreading will help to use CPU cache better and improve overall throughput.

Just a quick question for understanding this since I'm currently a bit wondering about my runtimes in comparison to others sometimes:
Is this app ONLY using FMA3 or does it also use others like AVX etc.?

2) Message boards : Number crunching : Badges - Full Sets! (Message 128510)
Posted 1454 days ago by DoctorNow

Finally - the missing 321 Sieve up to Gold and the Gold row is finished!
I wonder if I can manage bringing all up to Amethyst (this decade)...

3) Message boards : Generalized Fermat Prime Search : GFN-16 MEGA Prime Search starts March, 14, 2019 (Message 128001)
Posted 1473 days ago by DoctorNow

The "minimal" one must be saved as app_config.xml

app_config? Oh I see, overlooked that... *doh*
Seems to work now! :-)

@DeleteNull:
Hi "Stoffel" - the nickname's still DoctorNow, not only Doctor. That's "elemantary". ;-)

4) Message boards : Generalized Fermat Prime Search : GFN-16 MEGA Prime Search starts March, 14, 2019 (Message 127994)
Posted 1473 days ago by DoctorNow

<app_config> <app_version> <app_name>gfn16_mega</app_name> <cmdline>-t 4</cmdline> <avg_ncpus>4</avg_ncpus> </app_version> </app_config>

Well, even if there was a typo there which I fixed before even trying first, this "minimal" xml doesn't work (for me) - I get a syntax error nevertheless and lost my wus several times now.
As far as I could see in the project folder the app name is NOT gfn16_mega but cllr64.3.8.21.exe, so I tried it with a more detailed one like this:
<app_config>
<app_version>
<app_name>gfn16_mega</app_name>
<user_friendly_name>GFN-16 MEGA Prime Search</user_friendly_name>
<version_num>801</version_num>
<file_ref>
<file_name>cllr64.3.8.21.exe</file_name>
<main_program/>
</file_ref>
<cmdline>-t 6</cmdline>
<avg_ncpus>6</avg_ncpus>
</app_version>
</app_config>
But it still doesn't work - I don't get where the mistake is...

5) Message boards : Generalized Fermat Prime Search : DO YOU FEEL LUCKY? (Message 126788)
Posted 1503 days ago by DoctorNow

One more GTX 960-result for the record: 602,505.09 seconds

6) Message boards : Generalized Fermat Prime Search : DO YOU FEEL LUCKY? (Message 126293)
Posted 1510 days ago by DoctorNow

Well, these units are harsh on my 1080s, maxing out their fans, unlike the easier going units do.

And that means noise.

That surprises me a bit.
My GTX960 is taking my task more or less "lightly" and doesn't sound louder than usual.
While usage is at 100% of course, the fan is "only" at 70% with around 1800 rpm and temperature is around 70°C.
However, have to add that my comps case is opened by default. I guess it would be a bit higher if it was closed completely.

7) Message boards : Generalized Fermat Prime Search : DO YOU FEEL LUCKY? (Message 126096)
Posted 1512 days ago by DoctorNow

Michael Goetz wrote:

I mentioned on the WUProp forums that we had a new app running. That should bring in some players. They're always desperate for more apps.

"Desperate" is a harsh word to say. ;-)
You wouldn't have to mention it on WUProp because I believe PrimeGrid-apps are being intaken automatically there.
But not putting the new app in a news item was rather mean from my point of view because I follow almost every project with an RSS feed. ;-)

Dad wrote:

I wonder if I should try one on my GTX 550ti???

Well, I bet it won't work without having the system extremly lagging - if it works anyway. I remember I wanted to update my early 550Ti years ago with a modern CUDA version - wasn't even possible for an unknown reason...
I have one task running on a GTX 960 and it makes my host a bit sluggy. Cannot play without stopping the task and even doing other work is slighty hard, so I let it run for now.
At the current rate it will finish with a 7-day runtime - good that the deadline is long enough because at the end of this week I have to turn the host out for a few days.

8) Message boards : Number crunching : Badges - Full Sets! (Message 111131)
Posted 1970 days ago by DoctorNow

Took a while, but now I have a full set of Gold (or better) for all active projects (again). ;-)

9) Message boards : Number crunching : Badges - Full Sets! (Message 102899)
Posted 2276 days ago by DoctorNow

All active projects brought to Gold finally.
Wish I could've done that with 321-Sieve also, it annoys me that it's the only remaining Silver now... ;-)

10) Message boards : Number crunching : Winter Solstice Challenge (Message 102375)
Posted 2289 days ago by DoctorNow

I'm a bit surprised...
While AP27s are usually done in the half time on my GTX960 in reference to my GTX760, these PPS sieves here are done in the same time on both cards - about 1000 seconds.
Can anyone explain this?

Edit:
Examples: 760913081 960 vs. 760896659 760

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