20111026, 03:00  #749  
Dec 2010
Monticello
6B0_{16} Posts 
Quote:
Is there a way to detect multiGigabyte machines at installation/startup and ask if the required 300M of RAM can be used for P1 testing, before the LL tests get started? 

20111026, 03:22  #750 
"Kieren"
Jul 2011
In My Own Galaxy!
2×3×5^{2}×67 Posts 
I think I have the components to put together for an Opteron dualcore, 2.4GHz, with 3GB of RAM. No real GPU ability, I think. It's an ATI All in Wonder 9800 Pro, and the motherboard is only AGP. But this would work pretty well as a P1 machine? Something else?

20111026, 04:59  #751  
Jun 2003
7×683 Posts 
Quote:
Code:
LL P1 Prob Effort Effort Factors/ Cost Cost Succ saved spent Unit time  100 1.0 0.10 9.0 91.0 0.100 100 1.5 0.12 10.5 89.5 0.080 100 2.0 0.13 11.0 89.0 0.065 However, in the context of this thread, this is not the correct calculation. It is not a local (i.e. per exponent) optimization problem, but a global optimization problem. i.e Given the amount of compute power we have for dedicated P1, what is the most number of factors we can find, while staying ahead of the LL wave. Naturally, this is a dynamic point which will change based on the ratio of compute power available for LL vs compute power available for P1. So it might turn out that option 2 is the right one in the given context. Anyway, my gut feel is that B/S extension can safely be ditched in this context. 

20111026, 10:42  #752  
Jun 2003
7×167 Posts 
Quote:
Quote:
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So using your hypothetical figures, in the same time, we could do six of option 1, four of option 2, or three of option 3. Suppose the average LLing machine does an option 1 P1 on every nonP1ed exponent it gets. If we did 6 option 1s, we would save just the P1s on the LLing machines, for a ratio of work saved to work done by us of 1:1. Or we could do 4 option 2s. There is a 10% chance that we find a factor that the LLing machines Option 1 would also find, saving only that LLing machines Option 1 P1. There is also a 2% chance of finding a factor that the Option 1 machine would not have found, saving an Option 1 + LL cost. There is a 88% chance of finding no factor, again, only saving the LL machines' option 1 P1. combining these probabilities, we will certainly save the LL machines' option 1 P1 and we have a 2% chance of saving the LL cost which would not otherwise have been saved. The total saving is 4 * (1 + 0.02 * 100) = 12 the cost to us is 6 giving us a ratio of 2:1 Or we could do 3 option 3s. Using similar reasoning the total saving is 3 * (1 + 0.03 * 100) = 12, also giving us a ratio of 2:1. In this example, options 2 and 3 are equally good, but if option 1 was slightly more expensive, that would tip the balance in favour of us doing option 2, while a cheaper option 1 would tip the balance the other way. Quote:


20111027, 02:58  #753 
Dec 2010
Monticello
2^{4}·107 Posts 
P1 with 2 cores and 2 Gigs of RAM?? Yep....just get it an Xubuntu disk, so the OS doesn't eat it alive.

20111027, 03:56  #754  
"Kieren"
Jul 2011
In My Own Galaxy!
2·3·5^{2}·67 Posts 
Quote:
This just involves deconstructing an original Athlon box and putting the Opteron motherboard and PSU into the case. It will only have IDE drives, but I think that is a minor issue as none of the Prime apps are HDD constrained. It won't matter otherwise as this will be a dedicated box. Does VPN work on Linux? That would be the easiest way for me to control such a system: over my network. Last fiddled with by kladner on 20111027 at 03:59 

20111027, 04:36  #755 
Nov 2002
Anchorage, AK
3·7·17 Posts 

20111027, 04:38  #756 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3·2,399 Posts 

20111027, 04:41  #757 
"Kieren"
Jul 2011
In My Own Galaxy!
2×3×5^{2}×67 Posts 

20111027, 04:42  #758 
Nov 2002
Anchorage, AK
3·7·17 Posts 
How is SSH XP32? It's how I access my Unix servers.
Ahh, the simultaneous posting at work again. There are some Xp32 SSH freeware clients. Last fiddled with by delta_t on 20111027 at 04:45 
20111027, 04:43  #759 
"Kieren"
Jul 2011
In My Own Galaxy!
2·3·5^{2}·67 Posts 
