NFS@home challenge

Carlos Pinho · 15 Jul 2015 at 21:47

colinmcr said:
Damn these things always happen when I'm away from home.

Don't worry, there's plenty of work available. As I said before more than 1M wu's.

PDW · 15 Jul 2015 at 22:07

Carlos Pinho said:
I am hereby requesting Overclockers UK help on running lasieve5f application for NFS@Home. Sievers are now available for Windows 64-bit.
We are sieving two hard numbers, first one (6,490+) we have left 280k wus, for second number (2,1285-) we have scheduled more than 1M wus.

Thank you in advance,

Carlos Pinho
NFS@Home Moderator

I've put a few cores onto this but can't do too many due to the memory requirements. Can I ask why you are asking for help, I couldn't see anything on your forum about it ?

Carlos Pinho · 16 Jul 2015 at 18:07

PDW said:
I've put a few cores onto this but can't do too many due to the memory requirements. Can I ask why you are asking for help, I couldn't see anything on your forum about it ?

Asking for help to finish these two numbers as quick as possible so we can start working on harder numbers to justify next year grant of the cluster used for the post-processing stage.
When I can I do like to go to each individual forum and request help. It is a way to approach people to NFS@Home project.

Carlos

andy_taximan · 17 Jul 2015 at 09:21

Just got 16e now on main pc , had to turn down cpu usage to 60% to stop the waiting for memory messages

colinmcr · 17 Jul 2015 at 11:23

Carlos Pinho said:
Don't worry, there's plenty of work available. As I said before more than 1M wu's.

Well if I ever get my 2P rig finished I'll try do some

PDW · 17 Jul 2015 at 21:55

Carlos Pinho said:
Asking for help to finish these two numbers as quick as possible so we can start working on harder numbers to justify next year grant of the cluster used for the post-processing stage.
When I can I do like to go to each individual forum and request help. It is a way to approach people to NFS@Home project.

Carlos

Okay, thanks for the info.

Does it run better under Window or Linux ?

Carlos Pinho · 18 Jul 2015 at 11:34

PDW said:
Okay, thanks for the info.

Does it run better under Window or Linux ?

"Runs better", do you want me to comment about speed?

Last info I had was identical speed when they were compiling the windows 64-bit version of lasieve5f and new linux version.

Carlos Pinho · 18 Jul 2015 at 11:39

andy_taximan said:
Just got 16e now on main pc , had to turn down cpu usage to 60% to stop the waiting for memory messages

Have the same issue on my work laptop, running 3 threads out of 8. Only 8GB of memory.

In the meantime:

2,1285- sieve has started. We will go up to q=2200M or 2400M, meaning we will have 1.09M wus to 1.19M wus to process. Can we sieve this integer in time record?!

For 6,490+ we stopped at q=1800M. Still awaiting to complete the left overs, ETA= 1 week.

Best Regards,

Carlos

Carlos Pinho · 18 Jul 2015 at 20:44

Right now we have 21505 outstanding wus to complete the sieve of 6,490+ to q=1800M.

Carlos Pinho · 19 Jul 2015 at 22:28

andy_taximan,

Not sure if you notice but at this stage G2m1285_ wus only consume 430Mb therefore you can turn up cpu usage to 100%.

Carlos

andy_taximan · 20 Jul 2015 at 08:21

Carlos Pinho said:
andy_taximan,

Not sure if you notice but at this stage G2m1285_ wus only consume 430Mb therefore you can turn up cpu usage to 100%.

Carlos

tried 100% and got "waiting for memory" so backed it down to 80% , so got 12 threads running ok

Also got some G6p490_ wus what do they need?

hanluc · 20 Jul 2015 at 15:32

Andy have you changed the default boinc client memory usage? I think the default is set at only 50% when in use. It's under tools/computer preferences/disk and memory usage.

andy_taximan · 20 Jul 2015 at 19:26

hanluc said:
Andy have you changed the default boinc client memory usage? I think the default is set at only 50% when in use. It's under tools/computer preferences/disk and memory usage.

Ah well spotted lol yer was at 50%

Carlos Pinho · 20 Jul 2015 at 20:30

The G6p490 ones are the left overs that people didn't complete or aborted. They all end at _1 or _2, etc...
I have like 10 in queue.

Carlos

colinmcr · 20 Jul 2015 at 21:33

Ok I'm gonna try run some on my laptop here in India just for fun. Managed to get 6/8 running then read about default memory and managed to get all 8 going buy upping mem to 80%

Carlos Pinho · 24 Jul 2015 at 23:22

At current pace 2,1285- will be completely sieved within 100 days.

PDW · 25 Jul 2015 at 17:25

Carlos Pinho said:
At current pace 2,1285- will be completely sieved within 100 days.

Thanks, that was one of the questions I had been meaning to ask

The other question I have is when is your deadline for getting them done by so you can start on 'harder' numbers ?

andy_taximan · 28 Jul 2015 at 07:03

Woo , just taken 1st place in Top Hosts !! Greg (former number 1) is running 4 Tesla gpu 64gig ram pc! lol

Seems Greg is the Project administrator lol

We are now 40th place overall

Carlos Pinho · 2 Aug 2015 at 09:44

Sorry for the late reply. Some comments from Greg the Admin.

1) Server issues: "I think I tracked down the database slowdown. Turns out that the size of the database, specifically the host table, has grown substantially thanks to Syracuse’s 1.8 million host entries. It became larger than the cache assigned to it, so records were being read from disk rather than memory. That’s bad. I increased the max cache size to much larger than the table, so things should be back to normal now."

2) Records: "As far as setting a new record, the current lasieve16e binaries aren’t up to the task. They came close to running out of steam on our current records."
Also " I need to take a look at the full data set I have now and set priorities for the next grant proposal"

So we are trying to check from the Cunningham Tables and on other projects where we can be of assistant inside the limits of the sievers, closer to record pinch.

Thank you all for your support.
I'll let you know what will be the next integer to sieve.

Keep crunching, we are still far away to finish 2,1285-, more or less 850k wus.

Carlos

PDW · 2 Aug 2015 at 09:58

Carlos Pinho said:
Keep crunching, we are still far away to finish 2,1285-, more or less 850k wus.

Carlos

Thanks for the update Carlos.

Rough guess at less than 10 weeks to complete 2,1285- at current rates then !