Message boards :
Number crunching :
Panic Mode On (102) Server Problems?
Message board moderation
Previous · 1 . . . 5 · 6 · 7 · 8 · 9 · 10 · 11 . . . 25 · Next
Author | Message |
---|---|
Jeff Buck Send message Joined: 11 Feb 00 Posts: 1441 Credit: 148,764,870 RAC: 0 |
VLAR`s starting AR 0.012 not 0.12. That doesn't seem to be quite right, either. I just checked a recent VLAR on my daily driver, WU 2052285866, 10oc15ab.18223.809244.7.34.117.vlar, and see that it has an AR of 0.021689. So the cutoff must be above that AR, at least. |
Mike Send message Joined: 17 Feb 01 Posts: 34253 Credit: 79,922,639 RAC: 80 |
Hmmm, here's another; I`m not responsible for credit new. Our in house VLAR task is PG0009, PG0036 is mid range task. Thats a fact. With each crime and every kindness we birth our future. |
Mike Send message Joined: 17 Feb 01 Posts: 34253 Credit: 79,922,639 RAC: 80 |
self corrected. With each crime and every kindness we birth our future. |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
Hmmm, here's another; Here's a VLAR, WU true angle range is : 0.017926 http://setiathome.berkeley.edu/result.php?resultid=4707840067 So we Know 0.012 isn't correct. Anyone know the Real number? Here's another, http://setiathome.berkeley.edu/result.php?resultid=4707367923 15oc15aa.30629.25032.6.33.220.vlar_0 WU true angle range is : 0.021320 |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14649 Credit: 200,643,578 RAC: 874 |
Sounds like something got broken in the transition. 1) At what AR should workunits be designated VLAR - i.e. have those letters stuck on the end of the name? We can look in the splitter code (and the message boards) to see what that was before v8, and what it is now. 2) Has anyone seen a task with the designation VLAR getting sent to a NVidia GPU? That would be a scheduler problem, nothing to do with the splitter. |
Mike Send message Joined: 17 Feb 01 Posts: 34253 Credit: 79,922,639 RAC: 80 |
You might be correct TBar. I found a wu in my database AR 0.059 marked as VLAR. <workunit> <workunit_header> <name>21dc10aa.5028.1875.13.14.86.vlar</name> <group_info> <tape_info> <name>21dc10aa</name> <start_time>2455551.7086115</start_time> <last_block_time>2455551.7086115</last_block_time> <last_block_done>1875</last_block_done> <missed>0</missed> <tape_quality>0</tape_quality> <beam>10</beam> </tape_info> <name>21dc10aa.5028.1875.13.14</name> <data_desc> <start_ra>6.0913612802179</start_ra> <start_dec>16.851924049791</start_dec> <end_ra>6.0939483531098</end_ra> <end_dec>16.8607412978</end_dec> <true_angle_range>0.05963402754185</true_angle_range> <time_recorded>Tue Dec 21 05:00:23 2010</time_recorded> With each crime and every kindness we birth our future. |
Jeff Buck Send message Joined: 11 Feb 00 Posts: 1441 Credit: 148,764,870 RAC: 0 |
Whatever the cutoff was under v7, it definitely has changed for v8. I just checked my archives for December and found a VLAR (17ja11af.10230.44838.4.12.50.vlar_0) with an AR of 0.106412. That was the only one above 0.1, although I saw others in the 0.015-0.048 range. EDIT: And in November, I found 06mr11af.21497.9235.10.12.23.vlar_0 with an AR of 0.115419, so the originally posted cutoff of 0.12 looks like it was probably correct for v7. |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
You might be correct TBar. I have no idea what the numbers are for a VLAR, I was just going by what others had said. But, I'm fairly certain I wuz robbed. *nods head* |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14649 Credit: 200,643,578 RAC: 874 |
Found several clues. 1) There's a formal definition of what a VLAR is: when the AR is less than the beam width of the telescope being used. That's 0.05 for Arecibo. 2) There's a pragmatic definition, used for 'what not to send to CUDA' That was changed by https://setisvn.ssl.berkeley.edu/trac/changeset/848 (six years ago) to 'anything below 0.12 is called VLAR' (previously, it was 'anything below 0.013' - which clearly doesn't match the formal definition) 3) The splitter code was changed on 21 January 2016 (two weeks ago) to take account of the different beam widths of the different telescopes coming online. We probably need a mathematician (or an astronomer) to take a look at https://setisvn.ssl.berkeley.edu/trac/changeset/3355 - that's probably what went wrong. |
Mike Send message Joined: 17 Feb 01 Posts: 34253 Credit: 79,922,639 RAC: 80 |
Like Richard said something might have changed in V8 or there is an scheduler issue. I`m almost certain i had a 0.029 wu a few days ago not marked as VLAR. OTOH i have no problems with it. With each crime and every kindness we birth our future. |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14649 Credit: 200,643,578 RAC: 874 |
Um. How about this? Changeset 3355: 145 145 // check for VLAR workunits If we plug in that old Arecibo value of 0.05 for the beam width, the cutoff point comes out as 0.06, rather than the previous 0.12 |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13720 Credit: 208,696,464 RAC: 304 |
Like Richard said something might have changed in V8 or there is an scheduler issue. I haven't noticed anything on my systems marked as VLAR going to the GPUs, just the odd longer than estimated run times of some WUs. And those have been over the last few days, coinciding with the high proportion of VLAR work that was available. Grant Darwin NT |
Jeff Buck Send message Joined: 11 Feb 00 Posts: 1441 Credit: 148,764,870 RAC: 0 |
Um. How about this? That would make sense. I'm guessing the change didn't get implemented until the outage of 26 Jan, since my archives hold a v8 VLAR from a WU created 26 Jan 2016, 4:11:04 UTC, which has an AR of 0.088912. Since then, the highest AR I can find for a VLAR is 0.036281, whereas I know I've gotten a non-VLAR with an AR of 0.063161, so 0.06 could very well be the cutoff. |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14649 Credit: 200,643,578 RAC: 874 |
I've sent an email to Eric - with a note that it can wait until after the Superbowl weekend is over. |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13161 Credit: 1,160,866,277 RAC: 1,873 |
I've sent an email to Eric - with a note that it can wait until after the Superbowl weekend is over. But is this new definition really a problem? On fairly common Nvidia hardware, the tasks do complete 100%, just take about twice as long as the more common AR's the GPU's normally do. Plus, you get a commensurate increase in credit award though I acknowledge the credit is not linearly scaled. I haven't seen any .VLARs assigned to my GPUs yet by the scheduler. We won't know the full outcome I guess until the scheduler starts sending out Green Bank data. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Jimbocous Send message Joined: 1 Apr 13 Posts: 1849 Credit: 268,616,081 RAC: 1,349 |
Hmmm ... 14 channels in progress off 7 splitters. Here we go again? |
BilBg Send message Joined: 27 May 07 Posts: 3720 Credit: 9,385,827 RAC: 0 |
... until after the Superbowl weekend is over. Forgive my ignorance ... but what is Superbowl? (it must be some kind of sport I guess) I can Google it of course but ... why not make you a "pleasure" to tell me ;) Â - ALF - "Find out what you don't do well ..... then don't do it!" :) Â |
JLDun Send message Joined: 21 Apr 06 Posts: 573 Credit: 196,101 RAC: 0 |
But is this new definition really a problem? On fairly common Nvidia hardware, the tasks do complete 100%, just take about twice as long as the more common AR's the GPU's normally do. Hmm, not so much a problem, as an opportunity to get adjusted to a different percentage of work becoming VLAR? |
Cosmic_Ocean Send message Joined: 23 Dec 00 Posts: 3027 Credit: 13,516,867 RAC: 13 |
... until after the Superbowl weekend is over. American football. Similar to rugby, but with many more rules. The Super Bowl is the championship game for the end of the season. Linux laptop: record uptime: 1511d 20h 19m (ended due to the power brick giving-up) |
JaundicedEye Send message Joined: 14 Mar 12 Posts: 5375 Credit: 30,870,693 RAC: 1 |
The Super Bowl is the championship game for the end of the season.And the annual launch of every TV commercial for the coming year........";D> "Sour Grapes make a bitter Whine." <(0)> |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.