home page
Posts by San-Fernando-Valley

Posts by San-Fernando-Valley

1) Questions and Answers : Preferences : Terms used for CPU/Processor/Core/Thread or the likes ... (usage limits in preferences)in (Message 56684)
Posted 13 Aug 2017 by San-Fernando-Valley
We are very confused about the terminology used (not only) by CPDN and/or BOINC.

To our knowledge we understand, IN GENERAL, the following:

1) A motherboard can have one or more CPUs (physical object/s).

2) A CPU is the so called "Central Processing Unit".

3) A CPU is also called "processor" (the physical thing you buy at the store).

4) A "processor" has at least one "core" (inside the obove mentioned physical object).

5) A "multi-processor" has more than one core (makes i.e. mutliprocessing possible).

6) A "core" can have one or more "threads".

7) A "thread" is a certain logical pathway through the "core".

Hope you all, more or less, agree ...

If so, then one could be very irritated by the option that can be set in "preferences":
"use at most xxx % of the CPUs"?

Or, do we all have workstations which mostly have more than one CPU, err sorry, physical processor!

This setting can be found at numerous places.

Have a nice day, even after reading this!
2) Message boards : Number crunching : Computation error Weather At Home 2 (wah2) 8.24 on WIN7 64-bit (Message 56659)
Posted 9 Aug 2017 by San-Fernando-Valley
Oh, I see what you mean.

But strangely this is the PC where there still are two WUs running.
They were all started at the same time.

Under options COMPUTING (same on all PCs) I have set:

when to suspend
all first three boxes blank
last one checked ... when non-BOINC usage above 95%

Only BOINC is running on these PCs!

Maybe you have a point there pertaining to only use, let's say, 50% of cores.
Maybe running eight WUs on 4 cores makes problems - strange.
One WU thinks it has to swap (suspend) out in order to let the other WUs keep working???

I am no expert on these things.
I appreciate your time and help/infos.

Hate to repeat myself: but the other projects don't have these problems.
I know, one shoud not compare tomatos with potatoes.

Have a nice day ...
3) Message boards : Number crunching : Computation error Weather At Home 2 (wah2) 8.24 on WIN7 64-bit (Message 56652)
Posted 9 Aug 2017 by San-Fernando-Valley
Thanks for the reply.

Respective to your point 1:
Always selected ever since crunching (because I have plenty of memory - 64GB).
WUs are running as sole projects - no need to swap/restart/suspend whatever.
Haven't noticed any such behaviour - so this point can be dropped, I guess.

Point 2:
In the rare cases I have to suspend WUs (weather problems) I suspend and usually wait at LEAST 5 (five) minutes before further actions - should be enough time for checkpointing/cleaning up/whatever.

CPU-overheating is not an issue. Options are set so that max temps are never over 70 to 75 degrees C. Average is way lower.
I have very good power supplies (platinum 80 750 W) - never had one fade out on me.
The CP project is the only one where I am having these issues.

Right now I'm wondering why my one PC, which is somewhat picky, is still running nicely the last two long-run WUs I have at the moment. These were suspended just as often etc. as the other PCs - taking my time.

So far never had problems running all cores - I don't overclock or fiddel around. Everything is watercooled.
Other projects were running successfully at 100% load with extreme pressure on CPU AND especially GPU.

Tomorrow we are expecting more thunderbolts etc. - so I have a chance to risk my luck again ...

4) Message boards : Number crunching : Computation error Weather At Home 2 (wah2) 8.24 on WIN7 64-bit (Message 56642)
Posted 7 Aug 2017 by San-Fernando-Valley
... here we go again ... I'm adding my five cents of experience ...

Been running long WUs on three PCs WIN7 for, lets say, six to eight hours elapsed time. These WUs have an estimated run-time of approx. 4 or 9 DAYS!
I am also running short WUs (max. 2 DAYS).

After SUSPENDing the long TASKs due to CPU overheating problems, they tend to error out after RESUMING.

But on the otherhalf (correct english?), after having to SUSPEND the whole PROJECT because of (don't laugh) weather problems (lightning etc.) here at my site, the short WUs run OK.

The short and long WUs are all the same application (see title).
I wonder if there is a difference after RESTART in behavior between

Kind of kills my thrive to crunch ...

At present, I'm watching two more long WUs that are STILL running, despite SUSPENDING several times.

I hate to see my power bill ...
Have a nice day - where ever you are!
5) Message boards : Number crunching : Computation error Weather At Home 2 (wah2) 8.24 on WIN7 64-bit (Message 56070)
Posted 14 Apr 2017 by San-Fernando-Valley
"lots of errors ..." -- sounds nice for a production project.

Would probably be very helpful for novice users, if cp at n informs us of such problems ahead of time.

It is "no fun" waiting for an hour or more for delivery of WU just to experience a failure after a few seconds.

So, you would suggest to just wait for more WUs and to see if they run or not?

GREAT - Couldn't run my company that way ...

Have a nice day.
6) Message boards : Number crunching : Computation error Weather At Home 2 (wah2) 8.24 on WIN7 64-bit (Message 56068)
Posted 14 Apr 2017 by San-Fernando-Valley
elapsed time: 00:00:14 on one, the other one 00:00:12.
I don't really know what is going on, but the name of the Executable makes me wonder if it is a 32-bit problem:
I would appreciate your constructive feedback/solution!
I have searched in message board/forum for "computation error", but no hits.
Info: plenty RAM, plenty GB on disk, fast running machine - other projects work fine.