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Posts by Lazarus-uk

1) Message boards : Application Code Discussion : How to install the new optimised clients for Linux? (Message 9137)
Posted 25 Jan 2009 by Lazarus-uk
Post:
I am also a Linux noob, but I found that looking through these pages helped me to get things set up and working

I don't know what flavour of Linux you have, but you should find something on one of these:

Installing BOINC on Linux

Installing BOINC on Ubuntu

Gentoo, Fedora and Debian shortcuts here

You need to extract the optimized clients to the folder /BOINC/projects/milkyway

HTH
2) Message boards : Application Code Discussion : problem with checkpoints? (Message 8901)
Posted 23 Jan 2009 by Lazarus-uk
Post:
I'll take a look into this.


I've just done that, too, as I've read the news about the problems only now.
I changed nothing to that checkpointing stuff (besides the increased precision of the values stored in the checkpoints, but that is unrelated to this bug) in calculate_integral, so I would assume the problem applies also to the stock app (and probably all other apps out there). This is also evident by the report of the same problem for the linux applications.

A quick glance revealed, that when resuming from a checkpoint, the app starts from the last values for mu, nu and r. So the values for the last combination are actually added twice to the integrals, when resuming from a checkpoint. This of course screws the result (sometimes more, sometimes less, depending on the mu, nu, r combination).
I will add a fix to my application.

Edit:
I guess I will just move the writing of the checkpoint from the end of the loop to the beginning. It should produce correct results then. I think I had this done already at some point, but reverted it to have again the same scheme as the stock app without thinking too much about it.



Those 2 WUs I reported as failures, earlier in this thread, were started from checkpoints after a reboot of the pc. Since then I've had no more failures from checkpoints, whether after rebooting or not. The problem seems to have disappeared, for me at least. Or, maybe I've just been lucky in restarting from a place where the values don't affect the result too much.
3) Message boards : Application Code Discussion : problem with checkpoints? (Message 8816)
Posted 21 Jan 2009 by Lazarus-uk
Post:


I also have a couple tasks that have just failed to validate after restarting from checkpoints

63306531
63306530

I'm using Ubuntu 8.10 and speedimic's SSE4.1 Linux 64-bit App. Other WUs, that run straight through without checkpoints, are validating.


4) Message boards : Application Code Discussion : Recompiled Linux 32/64 apps (Message 8731)
Posted 20 Jan 2009 by Lazarus-uk
Post:
New recompiled apps for Linux64 on Intel:

SSE3_64


SSSE3_64


SSE41_64

It seems they don't run well on AMD, so it might better for AMD users to try a testfile in standalone mode --> look here

Please report errors (and success) here.



Just completed and validated my first WU with the SSE4.1 App.

Result here.

Running Linux-Ubuntu 8.10 64-bit, Q9450@3.4GHz, WU took 683 secs.


Looking good Mic


5) Message boards : Number crunching : Hopefully... (Message 4075)
Posted 14 Jul 2008 by Lazarus-uk
Post:
You may find that a lot of people are unable to meet the deadline for these new WUs unless you increase it somewhat. It just gave me 20 WU's with a deadline of 5 days. Now I'm running a Q9450 @ 3.4GHz (WU currently @ 51mins and 10%. So even at 3 or 4 hrs per WU that's 60 - 80 hours of work to be done in 5 days, plus other work that I'm already committed to.

I know I can finish them on time but, I don't think many others will be so lucky.

Either increase the deadline or shorten the WUs a touch.

Edit: It also means, as soon as the first WUs are finished, I won't be able to get new work from other projects for a few days, but I can live with that.
6) Message boards : Number crunching : Validation anyone (Message 3856)
Posted 19 Jun 2008 by Lazarus-uk
Post:
I know it sucks, but keep in mind we're still alpha here (not even beta). I really think this time around we've gotten all our cleaning-up processes running right so the validator/file uploader wont keep backing up on you guys. It's probably painful since we're still learning about the BOINC server here. We really are trying to get things running smoothly over here so you all wont have this kind of problems.



Thanks for the updates Travis.

Please, bear in mind that 'some' people here are very appreciative of your efforts and intend to stay with this project whatever. Also bear in mind that there are others who like nothing better than to make snide remarks whatever you try and do. It's a shamme that those same people cannot find it in themselves to congratulate when things go well. Still that's message boards for you.




7) Message boards : Number crunching : Problem with new W/Us (Message 3527)
Posted 27 May 2008 by Lazarus-uk
Post:
the new w/u's with task names starting with gs_373082 etc will not run on my up to date Ubuntu Hardy box. They just sit at 0% and don't move?? Working on all other boxes with Hardy that hasn't been updated. Anyone else have this problem??



I'm also having lots of compute errors. Running BOINC 5.10.45 on Win XP Pro (SP3).

27/05/2008 23:11:16|Milkyway@home|Output file gs_3737082_1211945903_968750_0_0 for task gs_3737082_1211945903_968750_0 absent




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