Sieving drive for k=1005-2000 n=200K-500K

[mdettweiler]

Originally Posted by gd_barnes

I'm still pretty much a Linux newb and using Max's instructions several months back was easily able to get 64-bit sr(x)sieve running on my Linux machines.

You just have to have Ubuntu version 8.04 or later installed on your machines to get the increased speed of 64-bit processing. Correct me if I'm wrong there Max.

One correction: you don't necessarily have to have version 8.04 or later. The only requirement is that you have a 64-bit version--and 64-bit versions of Ubuntu have been available long before 8.04. It's just that at the time you ordered your CD to install 64-bit on your machines with, 8.04 was the latest version so that's what you got. (There has been a new version, 8.10, released since then, but 8.04 should be good for a while since it's a "Long Term Support" version, meaning that Ubuntu will keep providing updates on it for a longer duration than usual. Thus, the Long Term Support versions such as 8.04 are usually good choices for machines like yours where the priority is stability and longevity, not necessarily cutting-edge versions.)

Come on Max, Carlos, and co., let's get some sieving reservations going here. Ian, can you add another quad to the mix also? It's OK if some of your reservations here are delayed by a couple of weeks.

I should be finishing my 5th Drive reservation sometime within the next day or so. At that point I'll grab a sieving range to replace it with.

Also, some good news: my quad is finally being put into regular use today! I'm transferring all the files from the old computer that it's replacing, and then it should be on for an average of at least 12-14 hours a day, hopefully more. Unfortunately, though, since it's not always the most convenient to manage prime search programs on it, it's primarily limited to LLRnet (i.e. no manual LLR or sieving). I've got it on G4000 for the time being.

Max

[MyDogBuster]

I have to shuffle things around after I return from an appointment. I'll be reserving more then. Let's try to get it to 8T by Jan 24th.

[Mini-Geek]

I'll take 4000G-4050G. This will delay my Drive 5 reservation a little (until it's done, obviously).

[MyDogBuster]

The reservations in the first post are wrong. As Flatlander pointed out to me, he reserved 3600-3800. I changed mine to 3800-4200.
Just trying to keep the books straight.

[em99010pepe]

Ian, change yours to 3800-4000 and then pick up from 4050.

[MyDogBuster]

Ian, change yours to 3800-4000 and then pick up from 4050.

Done

It looks like this (I hope)

Flatlander 3400-3800
MyDog 3800-4000
MiniGeek 4000-4050

[gd_barnes]

Originally Posted by Flatlander

Taking 3400-3600G.

Another one for the book:
"Never knowingly undersieved."

I'm running the above on two cores, 32 bit Windows, 3.15GHz. ETA 1st Jan.


This would be an ideal opportunity for me to try out the 64bit Ubuntu I have installed on my C2Duo.
I don't really want to start learning to speak fluent Linux just yet, but perhaps someone could post instructions here for me to get two instances of sr2sieve running? (Or maybe send me a PM.)
The instructions would need to be very specific. It would defeat the object if the PC was idle for hours while I figure things out.

Originally Posted by Flatlander

Taking/running 3600-3800G on two cores in Ubuntu 64bit.


I am getting little/no speed increase over 32bit Windows. Where can I get details of CPU speed/temps etc? How do I assign affinity to each core?

Originally Posted by MyDogBuster

I'm taking 3800 to 4200G

Originally Posted by MyDogBuster

The reservations in the first post are wrong. As Flatlander pointed out to me, he reserved 3600-3800. I changed mine to 3800-4200.
Just trying to keep the books straight.

What the heck?

Chris, you reserved 3400-3600 and then 3600-3800.

Ian, I posted that Chris originally reserved 3400-3600 and hadn't checked this thread since then. How could they have been wrong? lol

Ian, you reserved 3800-4200 and then said you're changing to 3800-4200. lmao

Have people gone loony here?

Please check post 1 here and let me know if it is right now.


Gary

[gd_barnes]

OK, I can kind of see what happened now. It looks like Ian tried to reserve 3600-4000 and Max changed the 1st post here after Chris had already reserved 3600-3800 and THEN Ian changed his original post to 3800-4200 making me wonder how he could change 3800-4200 to 3800-4200. lol Too many cooks in the kitchen.

The only question I have left is, Ian, are you taking 4050-4200 or 4050-4250 since Mini-Geek is doing 4000-4050?

[mdettweiler]

Originally Posted by MyDogBuster

Done

It looks like this (I hope)

Flatlander 3400-3800
MyDog 3800-4000
MiniGeek 4000-4050

Okay, fixed.

P.S.: It looks like Gary is on at the same time as I and posted his message about this as I was fixing the first post of this thread. Gary, just wanted to let you know so that we don't step all over each other's edits.

[gd_barnes]

Originally Posted by em99010pepe

How many k's are we talking about? How many are we double checking?

Carlos

All of them, 498 total. For the n=50K-350K range, < 10% double-check. For the n=350K-500K range, about 30% double-check. The double-checking of the top-5000 range while more than the 1st drive is much less than the 3rd drive where we had slightly > 50% double-check for n>480K and 35-40% double-check for n=260K-480K.

Originally Posted by Mini-Geek

I'll take 4000G-4050G. This will delay my Drive 5 reservation a little (until it's done, obviously).

Not a problem. That's to be expected. Everyone's reservations that help out here will be delayed a little.


Gary

[gd_barnes]

Originally Posted by MyDogBuster

I have to shuffle things around after I return from an appointment. I'll be reserving more then. Let's try to get it to 8T by Jan 24th.

Let's shoot for P=9T by Jan. 15th-17th. Once my P=1600G range is done by Jan. 5th, I'll be able to take another P=1600G range and finish it by Jan. 15th. Ian, if you can do the same, with others help, we should be able to get there. If not, I'll think about pulling 2 more quads in on the effort although would prefer not to if possible.

I think the 5000th prime will be at n=350K right around Jan. 15th-20th.


Gary