Start/Restart time (can it be saved)


Message boards : Number crunching : Start/Restart time (can it be saved)

Message board moderation

To post messages, you must log in.
AuthorMessage
Profile BilBg
Avatar

Send message
Joined: 19 Jun 12
Posts: 221
Credit: 623,640
RAC: 0
Message 712 - Posted: 19 Jan 2013, 11:37:31 UTC

From my earlier post:
http://asteroidsathome.net/boinc/forum_thread.php?id=62&postid=610#610

On my computer (AMD Athlon II X3 455 Processor 3.3GHz, Win XP):
http://asteroidsathome.net/boinc/show_host_detail.php?hostid=110

I noticed very long (~15 minutes) startup time (before the first checkpoint) of Asteroids@home tasks (this happens on start/restart of tasks)
Next checkpoints are done in a timely manner (every 1-1.5 minutes)

During this start/restart time (start/restart of tasks) no 'Progress' is made.

This may have big impact on Run time for people that use:
Suspend work while computer is in use
Suspend work when non-BOINC CPU usage is above
(and similar) and also if BOINC often switches tasks to run another in 'High Priority'

@Kyong:
What is computed during this start/restart time? (some table?)
Can the result (table) of this 'task startup' computing be saved on disk?

(I imagine:
- if this is task independent - save it to project directory (to be loaded and used for next tasks (of the same 'batch'?))
- if this is task dependent (different table for every task) - save it to 'slots' (in the 'checkpoint' file or in separate file)
)

If this is checkpoint dependent (different table computed from/for every checkpoint) - probably save is not possible?





- ALF - "Find out what you don't do well ..... then don't do it!" :)
ID: 712 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile Kyong
Project administrator
Project developer
Project tester
Project scientist
Avatar

Send message
Joined: 9 Jun 12
Posts: 584
Credit: 52,667,664
RAC: 0
Message 717 - Posted: 19 Jan 2013, 18:02:44 UTC
There are some precalculations but it can be fixed so that it can start compute from checkpoint sooner. But it's a little problematic to do the changes now because of more platforms so that the changes have to be made sepparately on those source codes and then test every platform.
ID: 717 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile BilBg
Avatar

Send message
Joined: 19 Jun 12
Posts: 221
Credit: 623,640
RAC: 0
Message 733 - Posted: 22 Jan 2013, 17:21:51 UTC - in response to Message 717.  

If you ever decide to make changes to the apps I would like also more info in stderr.txt
http://asteroidsathome.net/boinc/result.php?resultid=940551

E.g. 'Restarting at XX%', 'Staring calculation of ...', 'Calculation of ... finished' and something (short info) about the results from the task.





- ALF - "Find out what you don't do well ..... then don't do it!" :)
ID: 733 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote

Message boards : Number crunching : Start/Restart time (can it be saved)