Posts by David Anderson (not *that* DA)


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1) Message boards : Number crunching : CLOSED - SETI/BOINC Milestones [ v2.0 ] - XXVI - CLOSED (Message 1486837)
Posted 37 days ago by Profile David Anderson (not *that* DA)
I'm at 20,000,000 Seti and 30,000,000 combined
as of today...
2) Message boards : Number crunching : confused about boinc vs seti vs app_config.xml vs stock vs lunatics (Message 1473928)
Posted 67 days ago by Profile David Anderson (not *that* DA)
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.
3) Message boards : Number crunching : confused about boinc vs seti vs app_config.xml vs stock vs lunatics (Message 1473904)
Posted 67 days ago by Profile David Anderson (not *that* DA)
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.
4) Message boards : Number crunching : BOINC produces about 70% of INVALID results (Message 1471403)
Posted 74 days ago by Profile David Anderson (not *that* DA)
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.
5) Message boards : Number crunching : BOINC produces about 70% of INVALID results (Message 1465608)
Posted 88 days ago by Profile David Anderson (not *that* DA)
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.
6) Message boards : Number crunching : It tells me that i do not have a usible version of seti at home. (Message 1463221)
Posted 94 days ago by Profile David Anderson (not *that* DA)
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.
7) Message boards : Number crunching : finish file present too long (Message 1437572)
Posted 163 days ago by Profile David Anderson (not *that* DA)
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.
8) Message boards : Number crunching : Another Machine (5049618) Leaving a Massive Mess. (It's been fixed, atm anyway). (Message 1412223)
Posted 221 days ago by Profile David Anderson (not *that* DA)
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."
9) Message boards : Number crunching : Invalid Host Messaging (Message 1408881)
Posted 230 days ago by Profile David Anderson (not *that* DA)
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.
10) Message boards : Number crunching : Invalid Host Messaging (Message 1405264)
Posted 239 days ago by Profile David Anderson (not *that* DA)
(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.
11) Message boards : Number crunching : Invalid Host Messaging (Message 1404918)
Posted 240 days ago by Profile David Anderson (not *that* DA)
(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.
12) Message boards : Number crunching : Invalid Host Messaging (Message 1404479)
Posted 241 days ago by Profile David Anderson (not *that* DA)
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?
13) Message boards : Number crunching : Invalid Host Messaging (Message 1403425)
Posted 244 days ago by Profile David Anderson (not *that* DA)
Of course you all understood I meant from December 2012 to now...sigh.
14) Message boards : Number crunching : Invalid Host Messaging (Message 1403276)
Posted 244 days ago by Profile David Anderson (not *that* DA)
As of Aug 14, since Dec 2013 I have PM'd all of the 103
hosts I noticed (via Inconclusive results vs my
results) are producing
bad results.
Many days I don't have time to look, of course.

A small percentage of all Seti hosts, but makes me wonder
how many there are that behave badly. Hopefully the science
will not suffer.
15) Message boards : Number crunching : Wondering why host gets Invalid (Message 1386914)
Posted 287 days ago by Profile David Anderson (not *that* DA)
Thanks for the app_info.xml, John.

Looks like it should work for me
assuming my 1GB 560 TI can do just 2 instances on V7. Was doing 3
instances <count>0.33</count> successfully on V6.

I too have x41g installed on Linux 64bit from when we were on V6,
but was a bit unclear if it was ok to use, so was not using it.
Extremely busy the next 2 weeks, so x41g will have to wait.

Never imagined this thread would result in app_info.xml help :-)
16) Message boards : Number crunching : Wondering why host gets Invalid (Message 1385254)
Posted 292 days ago by Profile David Anderson (not *that* DA)
Host : http://setiathome.berkeley.edu/results.php?hostid=5940343
GPU/s : NVIDIA GeForce GTX 570 (1279MB)
State : All (1567) · In progress (112) · Validation pending (506) · Validation inconclusive (136) · Valid (113) · Invalid (699) · Error (1)
pm : Impossible. Unclear why Invalid.


task 3053496078 wu 1270505166

Idly I was wondering why a wingman with Inconclusive was getting mostly
Invalid, and looking at this wu and task left me puzzled.
I am not involved in this wu, it was just one I happened to look at
from the host Invalid list
and ... no obvious error. But marked Invalid.

Idle curiosity.
17) Message boards : Number crunching : surprising validation. Surprising Invalid (Message 1384437)
Posted 295 days ago by Profile David Anderson (not *that* DA)
Aha. As you say Donald, the WU is gone from the WU
records now. I had not imagined this WU might be one
of the things Eric was referring to!

Happy Seti Computing!
18) Message boards : Number crunching : NEW BOINC add-on 'SETIspirit' for SETI@home users (Message 1384427)
Posted 295 days ago by Profile David Anderson (not *that* DA)
Would be friendly, in announcements of applications, to say what
operating system(s) they apply to. There being more than one
operating system and all.
19) Message boards : Number crunching : surprising validation. Surprising Invalid (Message 1384312)
Posted 295 days ago by Profile David Anderson (not *that* DA)
Workunit 1251297698 seemingly makes a surprising choice of what to validate
and what to mark Invalid. I actually don't know how things
are supposed to work, so this could be ok. Just surprised.

Tasks 3010746740 and 3010746741 validated though they gave an error.
3011108564 and 3011301483 declared Invalid though they seemed
to run ok. The only computer (in the group
of 4 computers involved here) with a poor Valid record is 6142175
so perhaps that contributed to the somewhat surprising validation
decision. My computer in this group is 5766757.

http://setiathome.berkeley.edu/workunit.php?wuid=1251297698

Not worried about credit.
I'm wondering if this is one of those cases where fails get marked
as ok for what we humans might think is a bad reason.
Worried just a little about bad machines causing problems for the science.
20) Message boards : Number crunching : Timed out - no response (v6!) (Message 1381861)
Posted 303 days ago by Profile David Anderson (not *that* DA)
Timed out - no response

Got 11 v6 tasks somehow on June 14.
Long after draining all v6
tasks to completion,
removing app_info.xml, and starting work on v7. Strange.

Here is one of the tasks on that computer.
task wu computer
3038825236 1263799966 5766757

These were sent June 14 and timed out the same day.

It is not important, v7 has been processing fine. Just...strange.
If someone already mentioned this, sorry... point me to the thread please?


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