Checkpointing

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Sirius B Project Donor
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Message 2032832 - Posted: 17 Feb 2020, 20:53:52 UTC

Colour me dumb, but am I reading this right?

Shutdown laptop (ID 8899358} early this morning with the tasks running showing approx. 83%.
Booting up approx. 1 hour ago, tasks started from 0% (now at 16% approx.)
On desktop, tasks continue from where they left off.
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Profile Keith Myers Special Project $250 donor
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Message 2032837 - Posted: 17 Feb 2020, 22:02:26 UTC - in response to Message 2032832.  

Check your configuration settings for the laptop. See if it has local preferences set and no or a very long checkpoint interval. Or possibly it picked up web preferences from another project that does not have a checkpoint set. Also was this on a cpu task or gpu task?
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W-K 666 Project Donor
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Message 2032838 - Posted: 17 Feb 2020, 22:05:51 UTC - in response to Message 2032832.  

Colour me dumb, but am I reading this right?

Shutdown laptop (ID 8899358} early this morning with the tasks running showing approx. 83%.
Booting up approx. 1 hour ago, tasks started from 0% (now at 16% approx.)
On desktop, tasks continue from where they left off.

What is the last option "Request tasks to checkpoint at most every" in the BOINC client - Options - Computing Preferences screen?
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Richard Haselgrove Project Donor
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Message 2032839 - Posted: 17 Feb 2020, 22:20:05 UTC

Let's be certain that this was a SETI task? They're usually OK, depending on the settings that others have mentioned. But other projects may not checkpoint so regularly, and some don't checkpoint at all.
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Sirius B Project Donor
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Message 2032849 - Posted: 17 Feb 2020, 23:20:58 UTC

8899358 tasks
Only running Seti on web prefs which I've not changed since 13/2/19 & that was to reduce the cache.
Checkpointing every 60 secs.
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Message 2032859 - Posted: 18 Feb 2020, 1:43:40 UTC - in response to Message 2032849.  

The stock client interval is 60 seconds. But as Richard said, some projects don't checkpoint at all. It depends on the science application whether it checkpoints.
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Message 2032860 - Posted: 18 Feb 2020, 1:49:47 UTC - in response to Message 2032859.  

I realise that, but who has mentioned other projects?
Something is wrong,
It is a dual core & of the 2 tasks that hit 83% yesterday morning before shutdown, 1 has completed & validated last night. The 2nd is now at 59+%, why has that not completed & why start again from 0% for both tasks?
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Profile Siran d'Vel'nahr
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Message 2032895 - Posted: 18 Feb 2020, 11:11:00 UTC - in response to Message 2032859.  

The stock client interval is 60 seconds. But as Richard said, some projects don't checkpoint at all. It depends on the science application whether it checkpoints.

Hi Keith,

All of mine are set at 600 secs. Even the web preference is at 600 secs. I don't remember ever changing it. My old laptop is running stock because it has to and it is at 600 secs ( probably because of the web preferences).

Would it be wise to reduce that amount?

Have a great day! :)

Siran
CAPT Siran d'Vel'nahr - L L & P _\\//
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Sirius B Project Donor
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Message 2032907 - Posted: 18 Feb 2020, 12:55:17 UTC

Application
SETI@home v8 8.00
Name
07oc12ab.13907.26833.13.40.251.vlar
State
Running
Received
Sun 16 Feb 2020 02:58:15 GMT
Report deadline
Thu 09 Apr 2020 08:57:57 BST
Estimated computation size
183,887 GFLOPs
CPU time
00:04:11
CPU time since checkpoint
00:04:11
Elapsed time
00:04:56
Estimated time remaining
05:17:10
Fraction done
1.535%
Virtual memory size
110.33 MB
Working set size
89.72 MB
Directory
slots/0
Process ID
1245
Progress rate
18.720% per hour
Executable
setiathome_8.00_x86_64-pc-linux-gnu

Desktop on booting up, continued from where it left off & several tasks have completed.
Yet the laptop, as one can see...
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Message 2032982 - Posted: 19 Feb 2020, 6:20:31 UTC - in response to Message 2032907.  

Could it be that client thinks that your laptop 'switch off' is laptop 'sleep' and therefore doesn't need to save position.

But why it doesn't checkpoint is baffling.
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Sirius B Project Donor
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Message 2032997 - Posted: 19 Feb 2020, 9:30:18 UTC - in response to Message 2032982.  

Not sure WK. I have Boinc stop running the app when exiting, then I shutdown the rigs.
IIRC, some time in the past this was happening to many & again iirc, many aborted the tasks. Not sure what to do, so suspended both tasks, since that time, been running okay. Will wait until all tasks completed then have those 2 resume, if they still continue to avoid checkpointing, will just have to abort them.
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Message boards : Number crunching : Checkpointing


 
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