Posts by Aurimas

1) Message boards : Number crunching : Difference of credits (Message 78981)
Posted 24 Oct 2015 by Aurimas
Post:
So, I reduced the number of WUs crunched at a time to 2. Temp is no longer going up and down like before, and every once in a while the multiplier goes to the max setting.

Ugh, maybe I just need to repaste the CPU, AGAIN, and let it crunch full on.


Yes, I have problems with my laptops due overheating too, but I am using Tthrottle, which reducing boinc usage and keeping fixed temperature, which I am able to set.

Anyway, for experiments I used desktop computers with good cooling systems, so I am sure, that they runing 100% all time.
2) Message boards : Number crunching : Difference of credits (Message 78979)
Posted 23 Oct 2015 by Aurimas
Post:
I would expect the same exact hardware to score higher with Windows than Linux because Windows seems to more aggressively use Turbo mode than Linux.

I want to share with you experimental results of HP Compaq dc7800, Intel Core2 Duo CPU E6750 @ 2.66GHz [Family 6 Model 15 Stepping 11] and 2GB RAM. I tried it with 32bit Ubuntu 14.04 and 32bit Windows 10.

CPU | Cores | OS | Measured floating point speed | Measured integer speed | Claimed per hour | Granted per hour | Granted/claimed ratio
Intel Core2 Duo CPU E6750 @ 2.66GHz | 2 | Ubuntu | 2989,68 | 7676,18 | 44,47 | 50,73 | 1,14
Intel Core2 Duo CPU E6750 @ 2.66GHz | 2 | Windows 10 | 2560,13 | 5341,02 | 32,92 | 45,79 | 1,39


Also, I tried to run CPU benchmarks on BOINC several times, but results of floating point speed differs only 1-2%.
3) Message boards : Number crunching : Difference of credits (Message 78976)
Posted 23 Oct 2015 by Aurimas
Post:
Hello,

I am trying to do small research of hosts, donating to Rosetta. I noticed large difference between my tested hosts and all other hosts with same CPU by BoincStats \"Average credit per CPU second\" statistic. Now I am looking for reasons of this.

I noticed, that credits depending on operating system, but this difference is only about 5-10%. But I noticed 50-200% difference from BoincStats averages.

As I know, Rosetta granting credits by all identical CPU(?) average, so average credit must be simmilar to claimed credits. Unfortunately, here is large difference too :)

Maybe someone have minds, what can cause this. I still not tried, but maybe credits depending on WU length based on Rosetta preferences?






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