I'm developing a BOINC project to calculate Spectral Energy Distributions for
Astronomy images, but need some advice on tracking down an annoying little bug.
We are currently testing the application out using AWS to host it. The project
uses the BOINC wrapper to wrap some Fortran77 code. Essentially it processes a
number of pixels one at a time. Credit is assigned on the number of pixels
process as it uses a simple "brute force" model fitting approach.
The project is up and running on 32/64 bit Windows, OS X, and 32bit/64bit
Linux. Occasionally I am getting absolutely stupid cpu_time values as shown
below:
mysql> select userid, name, cpu_time,claimed_credit, granted_credit from result;
+--------+----------------------------------+--------------+----------------+----------------+
| userid | name | cpu_time | claimed_credit |
granted_credit |
+--------+----------------------------------+--------------+----------------+----------------+
| 1 | GI3_050001_NGC628_0001__wu31_0 | 677466.6 | 0 |
27 |
| 1 | GI3_050001_NGC628_0001__wu31_1 | 681845 | 0 |
27 |
| 1 | GI3_050001_NGC628_0001__wu31_2 | 680222.4 | 0 |
27 |
| 1 | GI3_050001_NGC628_0001__wu9_0 | 698966 | 0 |
0 |
| 3 | GI3_050001_NGC628_0001__wu12_2 | 1.218908e254 | 0 |
1 |
| 1 | GI3_050001_NGC628_0001__wu377_0 | 1.553102e254 | 0 |
39 |
| 1 | GI3_050001_NGC628_0001__wu108_0 | 1.553102e254 | 0 |
49 |
| 4 | GI3_050001_NGC628_0001__wu13_1 | 2.71667e254 | 0 |
34 |
| 4 | GI3_050001_NGC628_0001__wu707_1 | 9.07193e216 | 0 |
2 |
| 4 | GI3_050001_NGC628_0001__wu96_0 | 337490.8 | 0 |
10 |
| 1 | GI3_050001_NGC628_0001__wu96_1 | 322856.6 | 0 |
10 |
| 1 | GI3_050001_NGC628_0001__wu96_2 | 326189.8 | 0 |
10 |
| 1 | GI3_050001_NGC628_0001__wu74_0 | 305999.3 | 0 |
10 |
| 1 | GI3_050001_NGC628_0001__wu74_1 | 306578.1 | 0 |
10 |
| 4 | GI3_050001_NGC628_0001__wu588_0 | 934082.2 | 0 |
49 |
| 4 | GI3_050001_NGC628_0001__wu588_1 | 929387 | 0 |
49 |
| 4 | GI3_050001_NGC628_0001__wu588_2 | 918652 | 0 |
49 |
Some of the cpu numbers are greater than 1e216 - which are silly numbers. Could
someone point me in the right direction to debug this?
The odd thing is the same client can run the job twice and one run is fine,
whilst the next gives the stupid values. I've seen it happen on OS X, 32 & 64
bit windows. Not linux yet, but I only have one test client at the moment there
Thanks in advance
Regards
Kevin
--
Kevin VINSEN
Research Associate Professor
Ph: +61 (0)8 6488 7743
Mob: +61 (0)435 164 060
________________________________
[email protected]<mailto:[email protected]>
[email protected]<mailto:[email protected]>
www.linkedin.com/in/kevinvinsen<http://www.linkedin.com/in/kevinvinsen>
International Centre for Radio Astronomy Research (ICRAR)
Ground Floor, K&J Michael Building, 7 Fairway,
Crawley, Perth, WA 6009, AUSTRALIA
________________________________
ICRAR: Discovering the hidden Universe through radio astronomy
[http://www.icrar.org/__data/assets/image/0003/791346/image001.png]
www.icrar.org<http://www.icrar.org/> | Subscribe to ICRAR's
eNewsletter<http://www.icrar.org/#subscribe> | ICRAR on
Twitter<http://twitter.com/icrar> | ICRAR on
Facebook<http://www.facebook.com/pages/ICRAR/199692286227>
_______________________________________________
boinc_dev mailing list
[email protected]
http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev
To unsubscribe, visit the above URL and
(near bottom of page) enter your email address.
