PrimeGrid report deadlines incorrect?

This forum provides an FAQ for users as well as allowing you to ask questions about MundayWeb's very popular BOINC stats services.
Post Reply
Neil
Site Admin
Posts: 1345
Joined: Mon Apr 18, 2005 8:35 pm
Location: UK
Contact:

PrimeGrid report deadlines incorrect?

Post by Neil » Tue Oct 19, 2010 11:36 pm

Hi all,

Recently I have noticed that PrimeGrid keeps downloading work units for my PC that it reckons are going to take over 1,000 hours to complete despite having a report deadline that is way less than this.

Have you seen this as well?

Cheers,

Neil.

ChertseyAl
Established Member
Posts: 104
Joined: Tue Aug 26, 2008 8:13 pm

Re: PrimeGrid report deadlines incorrect?

Post by ChertseyAl » Wed Oct 20, 2010 6:51 pm

Neil wrote:over 1,000 hours to complete despite having a report deadline that is way less than this.
Which sub-project are they for? I reckon the SoB LLRs would take around 700 hours on my slow machines.

Maybe your DCF has got screwed up? Mine look pretty reasonable, but were completely thrown by PPS Sieve units at first.

Al.

Neil
Site Admin
Posts: 1345
Joined: Mon Apr 18, 2005 8:35 pm
Location: UK
Contact:

Re: PrimeGrid report deadlines incorrect?

Post by Neil » Wed Oct 20, 2010 11:11 pm

Hi Al,

Thanks for the reply.

It's always the "Woodall Prime Search (LLR) 5.11" work units that show the issue.

Sorry to be naive, but what does DCF stand for?

Cheers,

Neil.

ChertseyAl
Established Member
Posts: 104
Joined: Tue Aug 26, 2008 8:13 pm

Re: PrimeGrid report deadlines incorrect?

Post by ChertseyAl » Thu Oct 21, 2010 7:32 pm

Neil wrote:It's always the "Woodall Prime Search (LLR) 5.11" work units that show the issue.

Sorry to be naive, but what does DCF stand for?
Hmmm. WPS LLRs supposedly around 70 hours.

DCF is the Duration Correction Factor. Take a look in client_state.xml for <duration_correction_factor>

How quickly do they run? Do they meet the deadline? What happens if you try Sophie Germain or Proth Prime LLRs, both of which are really short? What about other projects?

Sorry, not an expert on Primegrid, even though it's my joint-favourite project along with SIMAP :)

Al.

Neil
Site Admin
Posts: 1345
Joined: Mon Apr 18, 2005 8:35 pm
Location: UK
Contact:

Re: PrimeGrid report deadlines incorrect?

Post by Neil » Fri Oct 22, 2010 10:00 pm

Hi Al,

Thanks for your help.

The correction factor is: 1.021687

Apart from the Woodall and Spierpinski Primegrid units, the rest complete fine within their deadlines. It just seems that the BOINC client is downloading work units that my PC has no chance of completing in time. It's very odd. I will try updating the BOINC client as I haven't done that for a while.

Cheers,

Neil.

Neil
Site Admin
Posts: 1345
Joined: Mon Apr 18, 2005 8:35 pm
Location: UK
Contact:

Re: PrimeGrid report deadlines incorrect?

Post by Neil » Fri Oct 22, 2010 10:02 pm

D'oh! Turns out I am using the latest version after all :-(

ChertseyAl
Established Member
Posts: 104
Joined: Tue Aug 26, 2008 8:13 pm

Re: PrimeGrid report deadlines incorrect?

Post by ChertseyAl » Sat Oct 23, 2010 6:45 pm

Neil wrote:D'oh! Turns out I am using the latest version after all :-(
Which is very strange, as I find the later versions are very mean when taking new work, sometimes running almost dry before downloading anything else :roll:

Probably worth asking over in the PG forums in case it's a duff batch of WUs.

Meanwhile just get a batch of work, go NNW, and keep aborting them until the client comes out of panic/hipri mode. I'm currently aborting ABC WUs because I've got half my machines clogged up with too much work :(

Oh, the DCF looks sensible.

Al.

ChertseyAl
Established Member
Posts: 104
Joined: Tue Aug 26, 2008 8:13 pm

Re: PrimeGrid report deadlines incorrect?

Post by ChertseyAl » Sat Oct 23, 2010 8:10 pm

Update: I'm now seeing a similar problem :shock:

I run a 1 day cache, but am getting 4 days work with PPS Sieve, i.e. enough to just complete in time, but putting the client into panic mode :(

Al.

Neil
Site Admin
Posts: 1345
Joined: Mon Apr 18, 2005 8:35 pm
Location: UK
Contact:

Re: PrimeGrid report deadlines incorrect?

Post by Neil » Sun Oct 24, 2010 12:22 pm

Hi Al,

I've decided to detach from PrimeGrid for now. I did log into my PrimeGrid account and checked that I had told it not to download Woodall etc. work units, but no, it still does.

Cheers,

Neil.

Post Reply