Quick Question about assignments

[Christenson]

WAG??? My foot!!!! that's at least a SWAG! (Sophisticated WAG). ;)

[Mr. P-1]

Originally Posted by garo

I've got a script set up to run tonight that will grab some small LL tests at 0000 UTC. My guess is that it will only get about 6 exponents so you can keep grabbing exponents as and when you can.

It's not a good idea to run server related scripts on the hour as the server invariably becomes unresponsive for a few minutes at that time, presumably because it's generating reports.

I intend to grab every exponent to 50M within minutes of expiry, i.e., at about quarter to midnight UTC, then unreserve every one TFed to 70 bits or more, and every one TFed to 69 and P-1ed. I don't know if I'll manage to sift them and do this by midnight UTC, but I'll try to make sure there are a few small ones available to your script by then.

I'm not sure how long trial factoring a 45M to 70 bits takes on my GPU. My guess is 40 minutes so I could do about 35 of these exponents in a day. I'll have more precise numbers this weekend.

Similarly I should have more data on how many exponents at each bit level are expiring each day. At the moment, and bearing in mind that Dubslow and Christenson also have GPUs, it sounds like my WAG was pretty accurate.

[Mr. P-1]

Originally Posted by Christenson

WAG??? My foot!!!! that's at least a SWAG! (Sophisticated WAG). ;)

It's not a SWAG. If it's at all accurate, then it's a LWAG.

[Mr. P-1]

Today, there were 248 expiries under 50M. Of these:

120 were 68-bit
39 69-bit (no p-1)
61 69-bit (with p-1)
20 70-bit
4 71-bit
4 72 bit

In accordance with previous discussion, I will hold onto the 68s and the no-p-1 69s for the time being and have unreserved the rest.

[Christenson]

Benchmark from the GTX440 tonight.
no factor for M44918161 from 2^71 to 2^72 [mfaktc 0.17 barrett79_mul32]
tf(): total time spent: 4h 53m 4.319s

16 more like those remain from your first batch. I'm planning on turning them in to the "manual assignments page". Do you want me to PM you with the results as well?

And what fate the batch of 150? I've passed the part you wanted to P-1 and the part in the continuation to a high-end GT480, but it is significantly less reliable than the GT440 because of the arrangements surrounding the machine, which is shared, and because it runs Windows, which shuts down on its own in the middle of the night despite my best efforts.

[Dubslow]

For 45M from 68-70, takes 46-47 minutes for me. So that's 29-30 assignments of that sort per day. (Though a pretty decent chunk of TF2 is played per day, so budget 26-27, and I'm also helping ckdo with DC's, so not every day will go to this. Time will be served on a first come first serve basis.)

[axn]

Originally Posted by Christenson

WAG??? My foot!!!! that's at least a SWAG! (Sophisticated WAG). ;)

FWIW, SWAG = _Scientific_ WAG

[Chuck]

Originally Posted by Mr. P-1

We could also try to recruit more GPU owners to the effort. With enough, we could maybe take all expiries to 70 bits and then some to 71. Perhaps one of us should post a call for assistance in the GPU forum. However before we do that, I think we need to sort out a system for coordinated assignment "grabbing" and distribution. To get every 68 bit expiry, we will need to "grab" every day. I've volunteered to do some "grabbing", but I'm not sure I want to commit to doing it every day.

If you need additional assistance I will forego my TF work in the 600M range and devote one instance of mfaktc on the GTX580 to your project.

Chuck

[garo]

Originally Posted by Mr. P-1

It's not a good idea to run server related scripts on the hour as the server invariably becomes unresponsive for a few minutes at that time, presumably because it's generating reports.

I intend to grab every exponent to 50M within minutes of expiry, i.e., at about quarter to midnight UTC, then unreserve every one TFed to 70 bits or more, and every one TFed to 69 and P-1ed. I don't know if I'll manage to sift them and do this by midnight UTC, but I'll try to make sure there are a few small ones available to your script by then.

You don't need to bother sifting. Think of my script as a low priority backup for the days you are not able to reserve exponents. And I run it at 5 past the hour.

[Mr. P-1]

I think the most useful unit of work here is a TF68-69. Everything else will be in multiples of that.

Based upon what people have said in this thread so far:

Dubslow ??? 15-16 minutes (about 90 per day)
Christenson GTX440 36-37 minutes (about 40 per day)
Christenson GT480 ???
garo ??? 13-14 minutes (est.) (about 100 per day)
Chuck GTX580 ???

[Mr. P-1]

Originally Posted by Dubslow

For 45M from 68-70, takes 46-47 minutes for me. So that's 29-30 assignments of that sort per day. (Though a pretty decent chunk of TF2 is played per day, so budget 26-27, and I'm also helping ckdo with DC's, so not every day will go to this. Time will be served on a first come first serve basis.)

The rule of thumb here is that a DC of an exponent half the size of an LL assignment should be TFed to four bits lower.

In other words, for DCs in the range 22.5M to 25M, a TF to 66 bits is as valuable to the project as our TFs to 70. TFs higher than that are less valuable.

As I've said on many occasions, the ethos of the project is not "do what makes most sense", but "do whatever floats your own boat". I'm just giving you information here, not telling you what to do. It's all good.