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Posts by Neil Newell

1) Message boards : Problems and Bug Reports : Test project Albert@Home now uses HTTPS (Message 112504)
Posted 3 May 2013 by Neil Newell
Post:
Same issue being reported in this thread, I believe. The website certificate was issued by "InCommon Server CA" on 1st May; older versions of Firefox (and presumably other browsers) don't seem to recognise this CA. My Albert hosts appear unaffected so far - relatively recent set-ups though so maybe they know the CA.

Edit: My hosts are affected too - though they're still ploughing through old jobs.
2) Message boards : Problems and Bug Reports : RPC error: Peer certificate cannot be authenticated... (Message 112501)
Posted 3 May 2013 by Neil Newell
Post:
Possible related - an older Firefox here didn't recognise the site certificate this morning (this linux box with FF10esr was ok, though 'view certificate' says the certificate was issued 1 May 2013 by CN "InCommon Server CA").

Edit: See this thread.
3) Message boards : Problems and Bug Reports : FGRP application v 1.05 (OPENCL) feedback thread (Message 112487)
Posted 1 May 2013 by Neil Newell
Post:
Thanks; seems a shame, because it's so close. I'll have to have a look and see if I can find out where the missing 192kb is! (it's not in use by the OS, being headless systems).
4) Message boards : Problems and Bug Reports : FGRP application v 1.05 (OPENCL) feedback thread (Message 112484)
Posted 1 May 2013 by Neil Newell
Post:
Will the new version work on cards with 512Mb, do you know? (ref. Message 112402).
5) Message boards : Problems and Bug Reports : Wrong GPU reported in output file. (Message 112420)
Posted 11 Apr 2013 by Neil Newell
Post:
Interesting - thanks for the info, I'd been wondering about it for a while (plus someone asked why my "2xGTX460" system was so fast!).

6) Message boards : Problems and Bug Reports : Wrong GPU reported in output file. (Message 112418)
Posted 11 Apr 2013 by Neil Newell
Post:
Not sure if this is relevant to the issue, but BOINC certainly seems to mis-report the GPUs present on the web pages (the start-up messages are correct). For example this host is actually a GTX570 and a GTX460 but shows as 2xGTX460, while this host shows as 2xGTX580 whereas it's really a GTX580 and a GTX570 (n.b. these hosts are only on einstein, not albert).
7) Message boards : Problems and Bug Reports : FGRP application v 1.05 (OPENCL) feedback thread (Message 112402)
Posted 28 Mar 2013 by Neil Newell
Post:
From the server log for your Nvidia host http://albert.phys.uwm.edu/host_sched_logs/5/5805:

2013-03-27 05:29:44.3316 [PID=32301] [version] Checking plan class 'FGRPopencl-nvidia'
2013-03-27 05:29:44.3316 [PID=32301] [version] NVidia device (or driver) doesn't support OpenCL

In principle, the devices support OpenCL, so I suspect the difficulty lies in the driver.


After upgrading to 310.40 (latest), the server log is now showing this:-

2013-03-28 21:21:34.5079 [PID=8389 ]    [version] Checking plan class 'FGRPopencl-nvidia'
2013-03-28 21:21:34.5079 [PID=8389 ]    [version] OpenCL GPU RAM required min: 536870912.000000, supplied: 536674304
2013-03-28 21:21:34.5079 [PID=8389 ]    [version] [AV#625] app_plan() returned false


If I understand that correctly, the app is requesting RAM of at least 512Mb but the card is reporting only 511.8125Mb available. The app only needs "300+MB Free" (post #1 in this thread) so is there any scope for a bit of tolerance here? :)

8) Message boards : Problems and Bug Reports : FGRP application v 1.05 (OPENCL) feedback thread (Message 112400)
Posted 27 Mar 2013 by Neil Newell
Post:
Fab, thanks! (and I'll know where to look in future).

The drivers are claimed to support OpenCL but maybe a more recent version is needed - I'll update the host and see if that fixes it.

9) Message boards : Problems and Bug Reports : FGRP application v 1.05 (OPENCL) feedback thread (Message 112398)
Posted 27 Mar 2013 by Neil Newell
Post:
Should Nvidia cards with 512Mb RAM receive work with this app? My ATI host has done quite a few units, but so far I haven't seen any on my Nvidia host (8800GT + 9600GT, each with 512Mb RAM, nvidia driver 295.75). The systems are essentially identical except for the video card.
10) Message boards : Problems and Bug Reports : Binary Radio Pulsar Search (Perseus Arm Survey) v1.33 feedback thread (Message 112390)
Posted 22 Mar 2013 by Neil Newell
Post:
Seem to have done a few of these too - ~42,000s on 9600GT/8800GT and ~34,000s on HD6850, which is about the same 10x increase in runtime over BRP as you've seen. The tasks that have validated got 2,400 credit each.


11) Message boards : Problems and Bug Reports : Wrong Wu's being sent once again ... (Message 112376)
Posted 18 Mar 2013 by Neil Newell
Post:
I agree it's worth pointing out when something is not working even on an experimental site (assuming the site has asked for feedback). But it wouldn't suprise me - not would I be unhappy - if the answer is something like "yes, that doesn't work here but it should do on the live site" or even if there was never an answer.

Or just maybe the answer comes back "wow, thanks for spotting that - good thing it was seen before the code made it to the live site" - which is actually nice, because it feels like you've made a useful contribution.

So I don't expect this site to necessarily work, and if something seems broken I wouldn't necessarily expect it to be fixed.

Anyway, with a bit of luck, one of the project devs will drop by and answer Steve's question.
12) Message boards : Problems and Bug Reports : Wrong Wu's being sent once again ... (Message 112373)
Posted 18 Mar 2013 by Neil Newell
Post:
It also used to say, in big friendly letters, "Don't expect anything to work here".


It still does (top mid-right, did it used to be somewhere else?)

13) Message boards : Problems and Bug Reports : FGRP application v 1.05 (OPENCL) feedback thread (Message 112368)
Posted 17 Mar 2013 by Neil Newell
Post:
On the couple of tasks I've seen running this, the speed-up appears to be about 5x (from ~10,000s to about ~2,000s) on a HD6850 - impressive stuff!

Presumably the improvement won't be as great on nvidia (as their OpenCL implementation reputedly isn't the best)?






This material is based upon work supported by the National Science Foundation (NSF) under Grant PHY-0555655 and by the Max Planck Gesellschaft (MPG). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the NSF or the MPG.

Copyright © 2024 Bruce Allen for the LIGO Scientific Collaboration