1) Message boards : Number crunching : Unusual Boinc Error (Message 21276)
Posted 1 Mar 2009 by jrobbio
I just thought I would make the mods aware of an error I am receiving via Boinc 6.45

01/03/2009 22:09:19||[error] Can\\\'t create HTTP response output file master_lhcathome.cern.ch_lhcathome.xml

01/03/2009 22:09:19|lhcathome|[error] Couldn\\\'t start download of scheduler list: fopen() failed

I haven\\\'t had a task since late January.

2) Message boards : Number crunching : Dotsch/UX - A USB/Diskless/Harddisk BOINC Linux Distribution (Message 20985)
Posted 16 Jan 2009 by jrobbio
This looks cool. I would d be interested to know if there is any performance increase when SuperSpeed USB 3.0 comes out at the latter end of the year.

Check this out:
SuperSpeed USB 3.0 in action at Engadget

3) Message boards : Number crunching : sixtrackbnl application tasks update (Message 20909)
Posted 8 Jan 2009 by jrobbio
On the front page there is mention of a sixtrackbnl application. Is this being actively tested or is it still in development as I have only ever received Application SixTrack 4.67 tasks.

4) Message boards : Cafe LHC : A longer delay for the Large Hadron Collider (Message 20842)
Posted 1 Dec 2008 by jrobbio
From the news article below:

The Large Hadron Collider will come back online in late summer 2009 at the earliest, and not in June as previously expected.


Hopefully they won\'t be forced into plan B.

5) Message boards : Number crunching : Problem with WU (Message 20830)
Posted 28 Nov 2008 by jrobbio
Your floating points scores aren\'t particularly impressive.

Floating Point = 934.86 million ops/sec
MIPS = 2048.08 million ops/sec

A computer with the same task, which did it in a third of the time had 3 times the CPU performance

Floating Point = 2931.25 million ops/sec
MIPS = 7365.98 million ops/sec

The T model Core Duo processors are designed for low wattage efficient performance. Running at ~85W your laptop has a 6th the power of my desktop. Your other computer would have done it twice as fast.

6) Message boards : Number crunching : Why BOINC 6.X has issues with LHC@home and other things (Message 20746)
Posted 7 Nov 2008 by jrobbio
Why should I work for them for free when their parent project has a $6 trillion budget and more money on the way? If they want me they can pay me a respectable wage.

So that\\\\\\\'s the reason why you are complain time after time after time after time on the same issue instead of just choosing to run an other project. You are one of those consults who is looking for a job. :)

Nice try, Tomas, but you are wrong :)

I do run other projects. None of my computers are attached to LHC because more than 30% of the work done for LHC is wasted effort. It is wasted because they have set IR > minQ. Using the IR > minQ to get results verified sooner was justifiable years ago when BOINC server did not have as many features as it does now. Modern versions of BOINC server has features that permit efficent strategies for getting results verified quickly. Unfortunately, LHC steadfastly refuses to implement those strategies and use the CPU time donated to them efficiently, the way professionally run projects attempt to do.

The reason I complain about LHC\\\'s wasteful practices is because they steal CPU time away from other worthy projects.

Do you mean like what is suggested by the WCG in this document?

Same doc as a powerpoint:

7) Message boards : Cafe LHC : The Large Hadron Colliderscope (Message 20737)
Posted 3 Nov 2008 by jrobbio
The government denies physics research is suffering from a lack of funding

From B3ta.com

More on the story here on the BBC News website Future of physics under threat
8) Message boards : Number crunching : Why doesn\'t LHC@home use CUDA? (Message 20733)
Posted 31 Oct 2008 by jrobbio
Wow those Tesla\'s aren\'t cheap are they! I have seen the nVidia Tesla C870 GPU for £363 + vat, but they are usually nearer the £600 mark. Check out the Tesla D870 Deskside Supercomputer here, which comes with 2 of them installed for a cool 5k: http://www.kikatek.com/product_info.php?products_id=66210

Here\'s the brief of the card:
NVIDIA Tesla C870 GPU computing processor is the first to bring a massively multi-threaded architecture to high performance computing (HPC) applications for scientists, engineers, and other technical professionals. The Tesla C870 GPU computing processor transforms a standard system into a personal supercomputer with over 500 gigaflops of peak floating point performance.

With a 128-processor computing core, a C-language development environment for the GPU, a suite of developer tools, and the world’s largest ISV development community for GPU computing, the Tesla C870 GPU computing processor enables professionals to develop applications faster and to deploy them across multiple generations of processors. The Tesla C870 GPU computing processor can be used in tandem with multi-core CPU systems to create a flexible solution for personal supercomputing.

Main Features:

* Tesla GPU\'s: 1
* Memory: 1.5GB GDDR3
* Memory Interface: 384-bit
* Memory Bandwidth: 76.8 GB/sec
* Maximum Power: 170W
* System Interface: PCI Express x16
* Auxillary Power Connectors: 2
* Thermal Solution: Active Fansink

9) Message boards : Number crunching : All my WUs resulted invalid (Message 20720)
Posted 30 Oct 2008 by jrobbio
Two pending, including mine, two in progress and nine client error, this my latest WU score. Random errors?

I just looked at your task list and compared it to the errors I\'ve been seeing. It seems to be solely the wjuly_lhcboind batch that is causing the problems.

Your wjuly_lhcamps and wjuly_lhcboinclongname work units passed successfully.
10) Message boards : Number crunching : All my WUs resulted invalid (Message 20705)
Posted 29 Oct 2008 by jrobbio
I\'ve just had an influx of WU\'s come in today and all of them have resulted in being invalid. My Boinc edition is 6.2.19 and has successfully received points in the past so I do not think this is a Boinc edition problem.

If you look at the work unit below, all the results returned have an outcome of client error:

Here are some of the Boinc editions that have failed 5.4.9, 5.10.28, 5.10.45, 6.2.16, 6.2.18, 6.2.19. Application versions 4.66 and 4.67.

This needs looking into otherwise there is going to be plenty of wasted computation hours.


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