multiple projects

Dave
Dave
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Topic 192000

hi there, can anyone help? i am new to this. i have 5 tasks downloaded. each having 20% of cpu. but only one is running. the other four are pre-empted. is there a way to get them all to run? or do they wait till one is finished? thanks

Erik
Erik
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multiple projects

Quote:
hi there, can anyone help? i am new to this. i have 5 tasks downloaded. each having 20% of cpu. but only one is running. the other four are pre-empted. is there a way to get them all to run? or do they wait till one is finished? thanks

They will only run one project per processor core. If a computer's processor was hyperthreaded (virtual cores) or a dual core (physical cores) it could run 2 projects at a time. Or a quad core...

This is the most efficient way to run the applications.

So yes, the other workunits are preempted and will be processed in the order as received.

Welcome to the project BTW.

Odysseus
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RE: hi there, can anyone

Quote:
hi there, can anyone help? i am new to this. i have 5 tasks downloaded. each having 20% of cpu. but only one is running. the other four are pre-empted. is there a way to get them all to run? or do they wait till one is finished? thanks


When your BOINC client is in the usual “round-robin� mode it checks its projects’ STD (Short-Term Debt) values every hour (you can change this timing in your General Preferences, if you like) and each time it completes a task. STD calculations include any weighting required (none in your case) to honour the resource shares. The science application that is ‘owed’ the most CPU time gets to run for the next hour (or less). However, if BOINC calculates that any task is likely to miss its deadline, it switches into “Earliest Deadline First� mode—the name is fairly self-explanatory—until it’s satisfied that everything can get done on time.

I notice that your computer is listed as having two CPUs (whether physical or ‘virtual’—HT or similar—I can’t tell), so you should be able to work on two tasks simultaneously. Go to your General Preferences, and under “Processor usage� look for the “On multiple processors, use at most� entry: if it’s currently 1, change it to at least 2. (Remember to update Einstein@home from BOINC Manager’s Projects tab after changing preferences from your account here, if you want them to take effect immediately; otherwise BOINC will find out about the changes next time it contacts E@h to fetch work.) This should just about double your productivity.

Dave
Dave
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ok thanks for that insight

ok thanks for that insight and information.i know my pc has duel processors, but i wouldnt know how to go about setting them up to run two applications. but thanks again. im now better informed at least! regards dave

Dave
Dave
Joined: 26 Oct 06
Posts: 4
Credit: 1,584
RAC: 0

RE: RE: hi there, can

Message 48954 in response to message 48952

Quote:
Quote:
hi there, can anyone help? i am new to this. i have 5 tasks downloaded. each having 20% of cpu. but only one is running. the other four are pre-empted. is there a way to get them all to run? or do they wait till one is finished? thanks

When your BOINC client is in the usual “round-robin� mode it checks its projects’ STD (Short-Term Debt) values every hour (you can change this timing in your General Preferences, if you like) and each time it completes a task. STD calculations include any weighting required (none in your case) to honour the resource shares. The science application that is ‘owed’ the most CPU time gets to run for the next hour (or less). However, if BOINC calculates that any task is likely to miss its deadline, it switches into “Earliest Deadline First� mode—the name is fairly self-explanatory—until it’s satisfied that everything can get done on time.

I notice that your computer is listed as having two CPUs (whether physical or ‘virtual’—HT or similar—I can’t tell), so you should be able to work on two tasks simultaneously. Go to your General Preferences, and under “Processor usage� look for the “On multiple processors, use at most� entry: if it’s currently 1, change it to at least 2. (Remember to update Einstein@home from BOINC Manager’s Projects tab after changing preferences from your account here, if you want them to take effect immediately; otherwise BOINC will find out about the changes next time it contacts E@h to fetch work.) This should just about double your productivity.


thanks for that. i posted my other reply before reading your post. i will go to the homepage and change the processors to two. and then update the application. thanks for your help. regards dave

Odysseus
Odysseus
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RE: ok thanks for that

Message 48955 in response to message 48953

Quote:
ok thanks for that insight and information.i know my pc has duel processors, but i wouldnt know how to go about setting them up to run two applications. but thanks again. im now better informed at least! regards dave


I’m not familar with setting up the BIOS on a PC—I’m mainly a Mac person—but I believe the fact that your host page shows two CPUs means that the system is already configured to use them both, else it would have reported itself as a single-processor machine. All you should have to do is set the relevant preference from your account page at any BOINC project. If that’s already at 2 or more, I wouldn’t know what to suggest next, but I’m sure others here could help you get running ‘on both cylinders’.

P.S. I see our posts are crossing here, so I’ll leave you to it … drop a line back if you have any trouble.

Dave
Dave
Joined: 26 Oct 06
Posts: 4
Credit: 1,584
RAC: 0

RE: RE: ok thanks for

Message 48956 in response to message 48955

Quote:
Quote:
ok thanks for that insight and information.i know my pc has duel processors, but i wouldnt know how to go about setting them up to run two applications. but thanks again. im now better informed at least! regards dave

I’m not familar with setting up the BIOS on a PC—I’m mainly a Mac person—but I believe the fact that your host page shows two CPUs means that the system is already configured to use them both, else it would have reported itself as a single-processor machine. All you should have to do is set the relevant preference from your account page at any BOINC project. If that’s already at 2 or more, I wouldn’t know what to suggest next, but I’m sure others here could help you get running ‘on both cylinders’.

P.S. I see our posts are crossing here, so I’ll leave you to it … drop a line back if you have any trouble.

hi again, i have just changed my preference to two processors and now have two applications running simultainiously. many thanks for that. problem solved!

regards dave

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