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drummers-lowrise
1) Message boards : Number crunching : Double Top Secret Mystery Challenge (Message 75163)
Posted 2805 days ago by samuel7Project donor
Thanks for your reply and the update.

That particular task was nearly done so I allowed it to complete. I did abort another just like it.
2) Message boards : Number crunching : Double Top Secret Mystery Challenge (Message 75147)
Posted 2805 days ago by samuel7Project donor
I wonder why this task was sent to me yesterday, a week after validation. Couldn't the server cancel unneeded, unsent tasks?

Also, how about an update on the cleanup?
3) Message boards : Number crunching : The Year of The Snake Challenge (Message 61775)
Posted 3247 days ago by samuel7Project donor
I wonder, does anyone have time to return 3 WUs per CPU core till the end of the challenge?

I managed 3 per core on my new 3930K @4.4GHz. Only three cores were available though for heat considerations.

The first units at b=45k took about 87h, the middle ones at b=62k-70k took 91h to 92h and the final ones at b=90k took about 94h. So I had a day and a half to spare even. :)
4) Message boards : Proth Prime Search : No available tasks (Message 53948)
Posted 3504 days ago by samuel7Project donor
PPS has run out of work again
5) Message boards : Project Staging Area : Call for wwwwcl beta testers (OpenCL) (Message 53635)
Posted 3508 days ago by samuel7Project donor
@all: The win app is only for ATI cards, you will get an error with a missing ati driver file and the app is crashing on nvidia cards.

Through reading here, some got it running on nvidia cards. I dont know how and why???

I needed only to make sure the libraries in the system matched the app (32 vs 64-bit).


Can you make a list of libs and your driver version pls?

Well, I installed the package from MS and it worked immediately. Links: x64 and x86

You may need to copy the files msvcp100.dll and msvcr100.dll from 'Windows\system32' to the folder of the executable. That Dependency Walker utility (available via the link Toshio posted) could be useful.

NVIDIA driver is 290.53
6) Message boards : Project Staging Area : Call for wwwwcl beta testers (OpenCL) (Message 53631)
Posted 3508 days ago by samuel7Project donor
@all: The win app is only for ATI cards, you will get an error with a missing ati driver file and the app is crashing on nvidia cards.

Through reading here, some got it running on nvidia cards. I dont know how and why???

I needed only to make sure the libraries in the system matched the app (32 vs 64-bit).
7) Message boards : Project Staging Area : Call for wwwwcl beta testers (OpenCL) (Message 53627)
Posted 3508 days ago by samuel7Project donor
Rebirther, your 64-bit app works fine on my NVIDIA card:
Win 7 Ultimate (64-bit)
i7 875K @2.93GHz (HT disabled, no other CPU tasks running)
9800 GT
Visual C++ 2010 Redistributable Package (x64) installed.


Examples:
d:\man\wwww>wwwwcl.exe -p5423711e9 -P5423715e9 -TWieferich -t2 -b3000 -s1000
wwwwcl v2.0
Sieve started: 5423711000000000 <= p < 5423715000000000
5423711968552697 is a special instance (+1 -488 p)

Sieve complete: 5423711000000001 <= p < 5423715000000000 110405720 primes tested
Elapsed time: 17.61 sec. (0.22 init + 17.00 sieve) at 6268625 p/sec.
Processor time: 24.60 sec. (0.22 init + 24.38 sieve).
Seconds spent in CPU and GPU: 17.60 (cpu), 25.24 (gpu)
Percent of time spent in CPU vs. GPU: 0.41 (cpu), 0.59 (gpu)
CPU/GPU utilization: 0.51 (cores), 0.73 (devices)

d:\man\wwww>wwwwcl.exe -p14490200e9 -P14490204e9 -TWieferich -t2 -b3000 -s1000
wwwwcl v2.0
Sieve started: 14490200000000000 <= p < 14490204000000000

Sieve complete: 14490200000000001 <= p < 14490204000000000 107488122 primes tested
Elapsed time: 17.51 sec. (0.36 init + 16.82 sieve) at 6139807 p/sec.
Processor time: 24.76 sec. (0.36 init + 24.40 sieve).
Seconds spent in CPU and GPU: 17.53 (cpu), 25.68 (gpu)
Percent of time spent in CPU vs. GPU: 0.41 (cpu), 0.59 (gpu)
CPU/GPU utilization: 0.51 (cores), 0.75 (devices)


No errors after installing the libraries from MS.
CPU use was 33 % (of 4 cores) for -t values 2 and above.
GPU-Z showed 96 to 98 % GPU usage so this old card can be fed by just one instance of the program. With just one thread, GPU usage was between 60 and 70 %.
Tried different -b values from 500 to 5000 and the differences were minimal but 3000 appeared to be best.

Will post results on a GTX 560 Ti later.
8) Message boards : PrimeSearchTeam message board (Message 53421)
Posted 3515 days ago by samuel7Project donor
Congrats on the find from me too!!

And the accolades go to s-yama, not to be confused with Shoichiro Yamada, the developer of GeneferCUDA, who of course is credited as well.

9) Message boards : Generalized Fermat Prime Search : N=524288 work now in queue (Message 50575)
Posted 3573 days ago by samuel7Project donor
Noticed something nice while trying to figure what the credit for the WR tasks would be. If the factor 3.2 for each n change were to be retained, we'd get:
3.2^3 * 8,000 = 262,144 = 2^18

Was this by design? :)

Maybe a better system, like one Michael mentioned, will be used, however.
10) Message boards : Generalized Fermat Prime Search : N=524288 work now in queue (Message 50252)
Posted 3577 days ago by samuel7Project donor
Also, credit has been bumped to 8,000. This applies to N=262144 reissues as well. Get them while you can...


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