Posts by David Anderson (not *that* DA)


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1) Message boards : Number crunching : Ubuntu 14.04 updates break cuda (Message 1614000)
Posted 6 days ago by Profile David Anderson (not *that* DA)Project donor
For now just living with it. No time
to deal with this.
Plus I could make things much worse... :-)

Anyway, thanks for the tips, ML1.
2) Message boards : Number crunching : Ubuntu 14.04 updates break cuda (Message 1613899)
Posted 7 days ago by Profile David Anderson (not *that* DA)Project donor
Switched to Noveau driver.
reboot
(Aside: the boot screen is much prettier with Noveau driver
than with nvidia driver, noveau giving blue screen with cute
xubuntu image and fancy progress indicator, nvidia drivers
give boring black/white screen with dots progress indicator)
Removed all nvidia (with synaptic).
reboot
installed nvidia-331
reboot

lsmod:

nvidia-uvm did not get loaded. Did modprobe which
loaded it, but its use count is zero...

No GPU seen by boinc. So this is not a case of
the upgrade mechanism getting mixed up by my specific
history on the the machine.

While Seti has had no CUDA work for me for a while
Einstein has a steady CUDA supply (now those are stuck).
Reports on Ubuntu suggest this bug is maybe fixed(?) for
next release but I see no sign it's been backported to 14.04. Yet.
3) Message boards : Number crunching : Ubuntu 14.04 updates break cuda (Message 1613440)
Posted 7 days ago by Profile David Anderson (not *that* DA)Project donor
Updated kernel etc today. Minor update
supposedly. Ubuntu 14.04. x86_64
nvidia gtx 760SC (2 of them)
Suddenly CUDA ceased working, boinc
cannot find GPUs. Ubuntu bug 1401350.
Non-working driver: 331.113.
4) Message boards : Number crunching : CLOSED*SETI/BOINC Milestones [ v2.0 ] - XXVII*CLOSED (Message 1567582)
Posted 5 Sep 2014 by Profile David Anderson (not *that* DA)Project donor
50 million for boinc, but Seti is not managing to
get as much of the computing as I would expect.
Solar panels providing the electricity!
5) Message boards : Number crunching : Who uses PCIe extenders; do they work? (Message 1523361)
Posted 1 Jun 2014 by Profile David Anderson (not *that* DA)Project donor
Emboldened by this thread I bought an extender from Hong Kong
($25 shipped) and a second GTX 760 SC and
made a holder (had to mod case of that machine
somewhat).

To my astonishment it is working.
Had the machine off most of the
day getting it assemble so it will take a
while to get to stable results.
Still only at about 50% of the PSU 860W rating.

Not getting any Seti GPU work at present, so the GPUs
are going to Einstein. But hopefully soon will get
more Seti GPU tasks.

So thanks to all for bringing this up and providing
advice. Would never have tried this otherwise.
6) Message boards : Number crunching : empty stderr or GPU 30 counts (Message 1522060)
Posted 28 May 2014 by Profile David Anderson (not *that* DA)Project donor
Here I mean in this forum, not this thread!
7) Message boards : Number crunching : empty stderr or GPU 30 counts (Message 1522059)
Posted 28 May 2014 by Profile David Anderson (not *that* DA)Project donor
Ok. I'll suggest they post here. Thanks.
8) Message boards : Number crunching : empty stderr or GPU 30 counts (Message 1521705)
Posted 28 May 2014 by Profile David Anderson (not *that* DA)Project donor
A few contributors have systems with GPUs that generate a
very high percent of Invalid: either
a) generate many empty-stderr tasks or
b) generate counts of 30 (or that add to 30)
Of course I noticed due to Inconclusive results we share.

It's bothering some of them --- they
responded im PMs saying so, but they don't know what to try and
I found it difficult to understand (from previous threads
that mentioned these things)
what to suggest for either of these issues.

So: suggestions for either sort of problem?
How they should proceed?
9) Message boards : Number crunching : CLOSED - SETI/BOINC Milestones [ v2.0 ] - XXVI - CLOSED (Message 1486837)
Posted 10 Mar 2014 by Profile David Anderson (not *that* DA)Project donor
I'm at 20,000,000 Seti and 30,000,000 combined
as of today...
10) Message boards : Number crunching : confused about boinc vs seti vs app_config.xml vs stock vs lunatics (Message 1473928)
Posted 7 Feb 2014 by Profile David Anderson (not *that* DA)Project donor
Advanced->Read Config Files

I get (dropping timestamps)
Suspending computation - user request
Resuming computation
Re-reading cc_config.xml
Not using a proxy
Config: GUI RPCs allowed from:
log flags: file_xfer, sched_ops,task


I don't see any sign of reading app_config.xml

app_config.xml contains stuff I gleaned
from the board earlier and may not be
correct or all I need to run MB and AP:
<app_config>
<app>
<name>astropulse_v6</name>
<gpu_versions>
<gpu_usage>0.5</gpu_usage>
<cpu_usage>0.4</cpu_usage>
</gpu_versions>
</app>
<app>
<name>setiathome_v7</name>
<gpu_versions>
<gpu_usage>0.5</gpu_usage>
<cpu_usage>.4</cpu_usage>
</gpu_versions>
</app>
</app_config>

Anything else I should have in there or anything
I should fix?

Ahhh. Bad access flags which were: rw-r----- (owned by root).
Changed to read-by-anyone and now on rereading config
the event log adds 'Found app_config.xml' to the output!

I don't have any Seti gpu work on hand, at the moment.
Thank you Fred! You got me thinking.
11) Message boards : Number crunching : confused about boinc vs seti vs app_config.xml vs stock vs lunatics (Message 1473904)
Posted 7 Feb 2014 by Profile David Anderson (not *that* DA)Project donor
I run recent Linux (Ubuntu 13.10) which identifies boinc as 7.2.7.

Stock seti (not Lunatics) which is using the nvidia GTX 760
fine. As is Einstein. Perhaps incorrectly (?) I did not delete the files
from the previous Lunatics 41z install (I did drain the
task list to empty before installing stock).
I renamed my Lunatics-based v6 app_info.xml so it is no longer
noticed.

But I was hoping to use app_config.xml in the seti project
under the boinc /var/lib/boinc-client/projects/seti* directory to
get a couple tasks running the gtx760 SC to see how that went.
But apparently app_config.xml is ignored with stock seti?

Sorry if this sounds confused, but I am confused.
I would like to get more
GPU tasks running (two would be nice, GPU is 3GB ram)
and I don't really understand the right way.

Delete old Lunatics and reinstall that?
(I would drain the task queues with 'no new tasks' button
first).

Or don't I need Lunatics for that control of the GPU with Seti?

Any hints would be much appreciated, and detailed instructions
even more appreciated.
12) Message boards : Number crunching : BOINC produces about 70% of INVALID results (Message 1471403)
Posted 31 Jan 2014 by Profile David Anderson (not *that* DA)Project donor
You mention 8 virtual cores so I guess that is 4 cores with
hyperthreading on (set by BIOS) so Linux counts 8.
I never could figure out if
hyperthreading helps with boinc.
Or if it hurts or is irrelevant.
In the end I sort of worried that Linux would not
clearly distinguish whether tasks
were sharing a real core when that was
pointless (if that even makes any sense)
so I turned off Hyperthreading in my BIOS.
Thinking (probably incorrectly) that it could be
better to run on distinct real cores rather than
sharing a real core across 2 tasks.

I agree with Rob that it's
good to set the cpu time % at 100. It means 100% of the
time of the cores-you-allow, but I guess that is obvious.
With those 4 real cores I would think running 100% on one
would be unobtrusive.

I'm not that knowledgeable, really, so I should shut up
and hope you get useful advice from...someone.
13) Message boards : Number crunching : BOINC produces about 70% of INVALID results (Message 1465608)
Posted 18 Jan 2014 by Profile David Anderson (not *that* DA)Project donor
Boinc Manager (on Linux) has (in Tools-> Computing Preferences) both

On multiprocessor systems use at most ___ % of the processors

and

Use at most ___% cpu time.

It's not clear from the posts which control you have been using.
Set the multiprocessor % to 50 as a start.
Leave the Use-at-most field at 100

That way you will get half the cores (whether you have 2 or 4)
running boinc stuff. I find that the default GPU setup uses
a small percent of an additional core.

Not that this is necessarily going to help...
Oh. On one machine I was having flaky issues (GPU invalids, 30 spikes)
and replacing the power supply, replacing the GPU, and fixing the heat
sink on the Northbridge chip got things working ok again. Dunno whether it
was one or all of those that mattered. Saw some notes on the web
about PSUs that
are ok except have short glitches ...
which got me to replace the PSU.
14) Message boards : Number crunching : It tells me that i do not have a usible version of seti at home. (Message 1463221)
Posted 11 Jan 2014 by Profile David Anderson (not *that* DA)Project donor
Donald is now up and running boinc. He just needed
a little Linux help. Recent Ubuntu defaults to
a window manager that looks tablet-y, which many
find annoying and difficult (I dislike
that too, on my desktop anyway). Switching to xfce
as window manager helped.
15) Message boards : Number crunching : finish file present too long (Message 1437572)
Posted 4 Nov 2013 by Profile David Anderson (not *that* DA)Project donor
Apologies, I managed to cause 8 or more "finish file present too long"
errors from host 5766757 at around 17:48 UTC, 9:48AM PST.
Since they were actual errors others will get good results
and all will be well.

Having a spot of difficulty here
which triggered this (new in Jan 2013) error. Apparently due to
having completed the writing of results but not finishing the task
and a (manual) reboot (one of a few about that time)
introduced a too-long delay. Greater care about suspending
tasks before rebooting Linux might have avoided the problem.

Rebooting Linux was a result of minor issues in upgrading from Ubuntu 13.04
to Ubuntu 13.10.

Thread 727778 (http://setiathome.berkeley.edu/forum_thread.php?id=72778)
was sort of about this specific message too.
16) Message boards : Number crunching : Another Machine (5049618) Leaving a Massive Mess. (It's been fixed, atm anyway). (Message 1412223)
Posted 6 Sep 2013 by Profile David Anderson (not *that* DA)Project donor
jason_gee writes:

"Boinc's redundancy mechanisms are designed to handle these 'Bad machines' along with cross platform variations to some (great?) extent. For the most part though I think that does sometimes put user expectations of reliability in the back seat, which might amount to efficiency concerns overall."

I wish it was just 'back seat', but users like Cellar Dweller (38588)
with host 6766751 think as follows.
Maybe others think this way too.

Part of a PM from Cellar Dweller in August 2013:
"The errors are for debugging and used so that they can perfect the software.

If I were to produce one good unit return out of a thousand - that's a good return. This is why I would only get one credit for the one return.

By killing the machine and not producing ANY results is what hurts.
BOINC works on the premise the more the merrier.
ANY good result is a + to the project."
17) Message boards : Number crunching : Invalid Host Messaging (Message 1408881)
Posted 28 Aug 2013 by Profile David Anderson (not *that* DA)Project donor
Wiggo, how do you determine that rigs "are being tightly
restricted"? The "In progress" State value or something else?
What number exactly means "tightly restricted" to you?

I have a list of over 100 hosts that have behaved badly and wonder
what fraction meet your restricted category.
Thanks.
18) Message boards : Number crunching : Invalid Host Messaging (Message 1405264)
Posted 19 Aug 2013 by Profile David Anderson (not *that* DA)Project donor
(not named here) writes in a pm today:

"The errors are for debugging and used so that they can perfect the software.

...

Nothing failed or invalid affects Seti in any way it's simply my PC and it's processing time wasted. The units go out to multiple folks and the numbers crunched when any fail or are invalid they simply go to the next guy.

If I were to produce one good unit return out of a thousand - that's a good return. This is why I would only get one credit for the one return."

Uhhh. Wow. 1 valid of a 1000 tasks is ok with this person.
19) Message boards : Number crunching : Invalid Host Messaging (Message 1404918)
Posted 19 Aug 2013 by Profile David Anderson (not *that* DA)Project donor
(not named here) got back to me again and explained how he is
a windows expert and administrator for 20 years
and the machine has nothing wrong with it.
Meaning, I guess, he wants to keep processing
Seti and getting errors and Invalids as his primary results.
20) Message boards : Number crunching : Invalid Host Messaging (Message 1404479)
Posted 17 Aug 2013 by Profile David Anderson (not *that* DA)Project donor
A contributor (not named here)
with a bad host replied to my request s/he deal with
the host issues
Validation inconclusive (192) · Valid (100) · Invalid (89) · Error (283)

in the following response to my PM:
--------------
I don't know exactly what I would do to fix the machine since there's absolutely nothing wrong with the machine?

This would have to be some issue with their software and Windows 8 or something else period.

This system has absolutely no issues what so ever in operation etc. and my main machine for everything I do.

Never had a BSOD, errors, anything period. Work, Gaming, etc. never a hiccup.

BOINC has had failures not just for me but many others when you look at the errors that do appear in the application for units.

Google BOINC Computational Errors. It will keep you reading forever.
--------------- end user response
Note that the Error tasks clearly show error reports like
(unknown error) - exit code -1073741819 (0xc0000005)

Will the owner do anything? Who knows?


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