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1) Message boards : Number crunching : Longer Sieve WUs (Message 23587)
Posted 397 days ago by Jack
i guess i've started to get longer WUs for GPU. unless something went wonky with my computer.

<core_client_version>7.6.33</core_client_version>
<![CDATA[
<stderr_txt>
Collatz Conjecture Sieve 1.21 Windows x86_64 for OpenCL
Written by Slicker (Jon Sonntag) of team SETI.USA
Based on the AMD Brook+ kernels by Gipsel of team Planet 3DNow!
Sieve code and OpenCL optimization provided by Sosiris of team BOINC@Taiwan
Collatz Config Settings:
verbose 1 (yes)
kernels/reduction 64
threads 2^10 (1024)
lut_size 18 (2097152 bytes)
sieve_size 2^30 (51085096 bytes)
sleep 1
cache_sieve 1 (yes)
reducecpu 0 (no)
Platform NVIDIA
Device 0000020C05614670
Max Dimensions 3
Max Work Items 1024 1024 64
Max Work Groups 1024
Max Kernel Threads 1024
Device Vendor NVIDIA Corporation
Name GeForce GTX 980 Ti
Driver Version 373.06
OpenCL Version OpenCL 1.2 CUDA
actual threads 1024
Start 3019898951266392342528
Stop 3019899004042950475776
Best 3019898952152652638367
Highest steps 2044
Total steps 358104709262722
Average steps 570
CPU time 0.5625 seconds
Elapsed time 417.903seconds
05:15:50 (8680): called boinc_finish

</stderr_txt>
]]>


and one straggler earlier was this

<core_client_version>7.6.33</core_client_version>
<![CDATA[
<stderr_txt>
Collatz Conjecture Sieve 1.21 Windows x86_64 for OpenCL
Written by Slicker (Jon Sonntag) of team SETI.USA
Based on the AMD Brook+ kernels by Gipsel of team Planet 3DNow!
Sieve code and OpenCL optimization provided by Sosiris of team BOINC@Taiwan
Collatz Config Settings:
verbose 1 (yes)
kernels/reduction 64
threads 2^10 (1024)
lut_size 18 (2097152 bytes)
sieve_size 2^30 (51085096 bytes)
sleep 1
cache_sieve 1 (yes)
reducecpu 0 (no)
Platform NVIDIA
Device 000002C747813F50
Max Dimensions 3
Max Work Items 1024 1024 64
Max Work Groups 1024
Max Kernel Threads 1024
Device Vendor NVIDIA Corporation
Name GeForce GTX 980 Ti
Driver Version 373.06
OpenCL Version OpenCL 1.2 CUDA
actual threads 1024
Start 3009427725890988539904
Stop 3009427732488058306560
Best 3009427726170699087719
Highest steps 1775
Total steps 44769881447430
Average steps 570
CPU time 0.546875 seconds
Elapsed time 52.2847seconds
03:43:25 (5096): called boinc_finish

</stderr_txt>
]]>


EDIT cool thing is that, i guess you all knew this but i'm bad at math, that the extra time spent on one WU is worth the same. i could do 7-8 of the previous length units in the time it takes to do one of these. although i do feel bad for those with lesser gpus
2) Message boards : Number crunching : Optimizing Collatz Sieve (Message 23269)
Posted 436 days ago by Jack
i'm doing work in 53ish sec on my gigabyte 980 ti xtreme which is clocked at 1520/2000

lut_size=18
kernels_per_reduction=64
sieve_size=30
verbose=1
threads=10
sleep=1
reduce_cpu=0


i looked up the cache size which is 3mb l2 (don't count the l1 cache, theres like a meg of it i think) and then i played with the rest of the values. i can KINDA use my pc while i have boinc open, its right on the limit at this point (i'm writing this post while its going). if you have a 980 ti, this is what you should be using if you want full utilization of your gm200 chip
3) Message boards : Number crunching : Credit (Message 23005)
Posted 483 days ago by Jack
i don't think anything is wrong with it at all. my 980 ti does a WU in 55 sec ^_^
4) Message boards : Number crunching : No Nvidia GPU tasks? (Message 23004)
Posted 483 days ago by Jack
i'm having ZERO issues on my 980 ti. i'm crunching thru work like a madman!




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