Posts by lunkerlander

1) Message boards : Number crunching : Real time number crunching? (Message 1975402)
Posted 16 Jan 2019 by Profile lunkerlander
Post:
Thousands!
Each task we run is a very narrow band sample of two seconds worth of data from one of the receiver channels and that takes at least a couple of minutes - so we are looking for a leverage of at least 100:1 in terms of performance.


According to the "About SETI@home tab", aren't workunits made up of 107 second tasks, that overlap slightly?

Here's a quote:
SETI@home looks at 2.5 MHz of data, centered at 1420 MHz. This is still too broad a spectrum to send to you for analysis, so we break this spectrum space up into 256 pieces, each 10 kHz wide (more like 9766 Hz, but we'll simplify the numbers to make calculations easier to see). This is done with a software program called the "splitter". These 10 kHz pieces are now more manageable in size. To record signals up to 10 KHz you have to record the bits at 20,000 bits per second (kbps). (This is called the Nyquist frequency.) We send you about 107 seconds of this 10 kHz (20kbps) data. 100 seconds times 20,000 bits equals 2,000,000 bits, or about 0.25 megabyte given that there are 8 bits per byte. Again, we call this 0.25 megabyte chunk a "work-unit." We also send you lots of additional info about the work-unit, so the total comes out to about 340 kbytes of data.
2) Message boards : Number crunching : Astropulse error with AMD/ATI GPU? (Message 1973799)
Posted 6 Jan 2019 by Profile lunkerlander
Post:
I ran 3 CPU tasks, leaving 1 core free,
3) Message boards : Number crunching : My Computer Builds And Other Projects (Message 1973250)
Posted 3 Jan 2019 by Profile lunkerlander
Post:
If I had credit card debt, I wouldn't even think about buying anything for SETI at home like the 1070ti's until you paid off the debt. Then, I would save up enough money to have an emergency fund for unseen expenses. I'm not trying to put anyone down. Just saying my own opinion.
4) Message boards : Number crunching : Astropulse error with AMD/ATI GPU? (Message 1973188)
Posted 3 Jan 2019 by Profile lunkerlander
Post:
Yes, I have a 50% error rate with my AMD astropulse tasks. I finally stopped doing astropulse tasks to not ruin the results data in case my wingman also had the same issue.
5) Message boards : Number crunching : Happy New Year!!! (Message 1972888)
Posted 1 Jan 2019 by Profile lunkerlander
Post:
Happy Near Year Everyone
6) Message boards : News : Report from the NASA Technosignatures Workshop released. (Message 1972255)
Posted 28 Dec 2018 by Profile lunkerlander
Post:
Interesting Read, Thanks!
7) Message boards : Number crunching : SETI@home v8.22 Windows GPU applications support thread (Message 1972242)
Posted 28 Dec 2018 by Profile lunkerlander
Post:
I do want to point out that I'm getting a lot of invalid Astropulse v7 results (approximately 50%) on both CPU and ATI GPU. I'm not overclocking anything and temperatures are good. This has been ongoing, even before I entered the new commandline.

The regular v8 8.00 CPU and 8.20 ATI GPU tasks are nearly 100% valid.
8) Message boards : Number crunching : Use for 15-20 oldish computers? (Message 1972104)
Posted 27 Dec 2018 by Profile lunkerlander
Post:
Actually I took an old case with a 220W power supply and put in a AMD Ryzen 5 2400G.
Power only goes to 30 Watts without the graphics card fully load with setiathome.
temps are 70-80C.
Cost $860 for all parts with os.
Can run AC odyssey smoothly.


I see you just joined and this is your first post. Welcome to the project and forums!
9) Message boards : Number crunching : SETI@home v8.22 Windows GPU applications support thread (Message 1972098)
Posted 27 Dec 2018 by Profile lunkerlander
Post:
Please use this comandline

-sbs 384 -period_iterations_num 30 -spike_fft_thresh 2048 -tune 1 64 1 4 -oclfft_tune_gr 256 -oclfft_tune_lr 16 -oclfft_tune_wg 256 -oclfft_tune_ls 512 -oclfft_tune_bn 32 -oclfft_tune_cw 32 -cpu_lock

Edit: There is no difference for AMD cards between v8.20 and v8.22.
All modifications are Nvidia only.


Thanks again, Mike! I tried your suggested commandline again and its working great! My BLC tasks are finishing in about 7 minutes (instead of 8 minutes with without your commandline) on both my RX470 and RX570. It's been running for a few hours now and everything looks good.
10) Message boards : Number crunching : Multi-GPU hardware setups: My method (feel free to share your own!) (Message 1972025)
Posted 26 Dec 2018 by Profile lunkerlander
Post:
This thread needs more love!!!

Sorry for the HUGE pictures, I'm not sure how to re-size for forum use?
Also, if you think cable management is important, consider this your "trigger" warning!

ASUS X99-E-10G WS Motherboard
*Motherboard has 7 PCIe slots & a PCIe M.2 slot, hence the ability to run 8 GPU simultaneously.
*When the M.2 slot is used with a GPU, this is the card that drives the monitor. Unsure why.
Intel i7-5960x - 8/16 - @ ~4.0GHZ (water cooled)
2x EVGA Titan X Hybrid GPU (maxwell)
6x EVGA 1070SC Gaming GPU (pascal)
EVGA 1600 T2 PSU
I forget the H2O system, RAM, and other component stats, as this was a couple years ago.
Windows 10 and Stock SETI App.
Various Configurations (it continuously evolved):




Same rig with seven Zotac GT1030 single slot cards. This short-lived test was quite important for what, at the time, was my eventual goal for my dedicated SETI rig.


Rig as it sits now (finally back up and running!).
ASUS X99-E-10G WS Motherboard
Intel i7-5960x - 8/16 - @ ~3.8GHz (air cooled)
4x NVIDIA Titan Xp GPU (pascal) with EVGA 1080Ti Hybrid Water Cooler Kits
Linux Lubuntu 16.04 & CUDA90 App


A few notes*
The 8-GPU rig very nearly set my house on fire. If you are going to try a setup like this, make sure not only your PSU (or two) is capable of the stress, but your home wiring is up to the task as well. No joke, there were flames and a melted outlet, I was lucky to be home to witness the event and stop it immediately. Air cooled CPU and GPU are LOUD, Very loud. Not much you can do about thermal output, but switching to water-cooled CPU and GPU drops the noise pollution significantly. This brings me to the seven GPU test. I bought this motherboard specifically for an incredibly insane idea. Mount 7 GPU to the MOBO, all in a water loop, to have a ridiculous SETI rig, while maintaining a small physical and audible footprint. My goal was to use SEVEN NVIDIA Titan Xp GPU, like the four in the last picture above. These cards, when equipped with a water plate, physically become single-slot cards. To make a long story short, this is a good example of what I was after, before I went broke... HAHA:

https://rawandrendered.com/octane-render-hepta-gpu-build

That was my eventual goal, but I ran out of money so 4x Titan Xp will have to do haha! Even If I had the money to complete my build, I would still have (as Ian&Steve C. mentioned) power delivery issues. I'll have to wait until I own a house and can make some specific modifications to the electrical system before I feel comfortable adding much to this unit. A custom water loop with an external (read: outdoor) radiator is also on the list, but that's another insane idea that is just going to have to wait.

Let's see some more crazy rigs!!!!


I was browsing on Youtube for SETI videos and your computer setup with 4 titan Xps being converted to water cooling came up. I watched it. It looked like a neat project!
11) Message boards : Number crunching : Help define some terms used in a reported task (Message 1971431)
Posted 22 Dec 2018 by Profile lunkerlander
Post:
Below is part of the info from one of my completed tasks. I've read the seti at home science info pages and have a basic understanding of what the apps are looking for and reporting. For example, I know what triplet and gaussian are. Can anyone help define some of the following:

score
unscaled peak power
peak (is this how high the signal spike is?)
period (is this how often a signal repeats?)
+ any other terms you see used below that you'd like to point out what they mean. Thanks!


Here is what part of the task report looked like:
period_iterations_num=50
Pulse: peak=4.959887, time=45.9, period=10.02, d_freq=6316766807.56, score=1.144, chirp=40.938, fft_len=2k
D: threshold 0.6622109; unscaled peak power: 0.7396384 exceeds threshold for 11.69%
Pulse: peak=1.745345, time=45.86, period=2.655, d_freq=6316772726.25, score=1.08, chirp=53.308, fft_len=1024
D: threshold 0.1572715; unscaled peak power: 0.1650535 exceeds threshold for 4.948%
Pulse: peak=1.092289, time=45.82, period=1.158, d_freq=6316768743.11, score=1.011, chirp=63.256, fft_len=128
D: threshold 0.01597591; unscaled peak power: 0.01606624 exceeds threshold for 0.5654%
Pulse: peak=3.379097, time=45.84, period=7.617, d_freq=6316774685, score=1.012, chirp=-71.927, fft_len=512
D: threshold 0.1361406; unscaled peak power: 0.1373694 exceeds threshold for 0.9026%
Triplet: peak=11.37841, time=61.01, period=15.16, d_freq=6316768017.5, chirp=-81.62, fft_len=64

Best spike: peak=23.08, time=40.09, d_freq=6316775435.03, chirp=21.075, fft_len=128k
Best autocorr: peak=16.87226, time=17.18, delay=3.9247, d_freq=6316772131.21, chirp=-19.193, fft_len=128k
Best gaussian: peak=0, mean=0, ChiSq=0, time=-2.124e+011, d_freq=0,
score=-12, null_hyp=0, chirp=0, fft_len=0
Best pulse: peak=4.959887, time=45.9, period=10.02, d_freq=6316766807.56, score=1.144, chirp=40.938, fft_len=2k
Best triplet: peak=11.37841, time=61.01, period=15.16, d_freq=6316768017.5, chirp=-81.62, fft_len=64

Spike count: 0
Autocorr count: 0
Pulse count: 4
Triplet count: 1
Gaussian count: 0
12) Message boards : Nebula : Modeling ET better (Message 1971428)
Posted 22 Dec 2018 by Profile lunkerlander
Post:
Thanks for keeping us updated on your progress with Nebula! It seems to be a difficult process to try to remove RFI to weed out any false positive signals without losing any potential real signals.
13) Message boards : Cafe SETI : What are you coding? (Message 1971144)
Posted 20 Dec 2018 by Profile lunkerlander
Post:
I'm not a programmer, but I did start trying to learn Java. I followed along with a book called Java in 24 hours and wrote the same programs that were in the book. Then I used the book to write a couple small programs of my own. That was a year ago.
14) Questions and Answers : Windows : PROBLEMS WITH SCREEN SAVER (Message 1970980)
Posted 19 Dec 2018 by Profile lunkerlander
Post:
I don't know exactly why without seeing a screenshot of your screen. Did you click "view graphics" and the screensaver doesn't display?
15) Message boards : SETI@home Science : Key to reading tasks by name to find out where it came from, what type it was, etc. (Message 1970461)
Posted 15 Dec 2018 by Profile lunkerlander
Post:
Thanks everyone! That helps a lot. I use the lunatics version of the seti apps, so I can't see the screensaver to find out the info on the task anymore. I remember being able to do that in the past, and I read the web page on how to understand what it was telling us, so it made sense after a while. Originally, when I first downloaded BOINC back in July, the SETI screensaver was overwhelming.
16) Message boards : SETI@home Science : Key to reading tasks by name to find out where it came from, what type it was, etc. (Message 1970407)
Posted 15 Dec 2018 by Profile lunkerlander
Post:
Here are some examples of task names that I'd like to be able to understand:
13dc18aa.5576.7020.16.43.88.vlar_0
blc14_2bit_guppi_58405_78644_PSR_J2022+5154_0007.9620.409.22.45.66.vlar

I've noticed that the "13dc" tasks take longer than the "blc14" tasks. I remember reading once how you can read info about a task based on its name. Can anyone point me to the web page that explains this, or give me a quick review?

Things like: vlar, guppi, blc14, 13dc

Thanks in advance!
17) Message boards : Number crunching : Please help: BOINC not seeing 2nd GPU Windows 10 (Message 1970136)
Posted 13 Dec 2018 by Profile lunkerlander
Post:

I found it: C:\ProgramData\BOINC\projects\setiathome.berkeley.edu
That's not where the cc_config.xml file should go.

cc_config.xml is a BOINC configuration file, not a Seti file. So it should go into the BOINC Data directory, C:\ProgramData\BOINC
Make sure first there isn't already such a file there, and that it doesn't already contain a line for <use_all_gpus>, because if you add your own line at the top of the file, and there's another at the bottom with an opposite switch, the last line is used. If a line is present, change its value from 0 to 1 and save the file.



Thank you!! This worked! Thanks everyone for you help! I would never have figured this out on my own.
18) Message boards : Number crunching : Please help: BOINC not seeing 2nd GPU Windows 10 (Message 1970132)
Posted 13 Dec 2018 by Profile lunkerlander
Post:
Make sure that "Show Hidden Files/Folders" is Enabled, AND "Show Extensions..."

If this was NOT done previously, then, (as Juan suggests), your "cc_config.xml" File is REALLY "cc_config.xml.txt"

Once the above changes are made, and from within Notepad, when you Save - ALWAYS choose "Save As". THEN for File Type make sure that ALL or *.* is showing, and then save the File as "cc_config.xml" <<--- (NO .txt at the end...)


TL


I think I did save it as .txt I opened it and did "Save As" all files. Now its full name is cc_config.xml. However, it didn't solve the problem. I'm going to try a clean install of the drivers next.

Thank you all for your help! I'll report back,
19) Message boards : Number crunching : Please help: BOINC not seeing 2nd GPU Windows 10 (Message 1970074)
Posted 13 Dec 2018 by Profile lunkerlander
Post:
So here's the history: I had a RX 560 originally. Then I added an RX 570 and BOINC used both GPUs no problem. I decided to upgrade the RX 560 to an RX 470. I used just the RX 570 for a while while until the RX 470 came.

I installed the RX 470, updated the drivers, restarted the computer and BOINC only used the RX 570. I added the CC_config file to boincdata folder and then restarted my PC twice. BOINC started using the RX 470 and not the RX 570 now.
20) Message boards : Number crunching : Please help: BOINC not seeing 2nd GPU Windows 10 (Message 1970072)
Posted 13 Dec 2018 by Profile lunkerlander
Post:
Anyone have any ideas?


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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.