Multiple workunits in one download?

Desti
Desti
Joined: 20 Aug 05
Posts: 117
Credit: 23762214
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Topic 192224

Hello,

what are this 15 MB large WU's, which contain more than one small workunit?
It looks like BOINC is not able to do them right on multiprocessor systems with the default 0.1 days cache.

When I got one of this workpackages, BOINC starts a WU on every core, but at the end, when only one WU is left, all other cores had to wait until the last WU is finished before BOINC starts to download new work.

Alinator
Alinator
Joined: 8 May 05
Posts: 927
Credit: 9352143
RAC: 0

Multiple workunits in one download?

Well, the 15MB file is the datapack, and they have more than one result's worth of work, regardless of the type. The other smaller files with the same root name are the actual results to run from it.

However if I'm reading your post right, you are correct that you should not get a "stall" for a new datapack because one core was working on the last result in the previous pack.

What were you getting on the message tab when this occured? Is this the first time you've seen this happen?

Alinator

RandyC
RandyC
Joined: 18 Jan 05
Posts: 6609
Credit: 111139797
RAC: 0

RE: Hello, what are this

Quote:

Hello,

what are this 15 MB large WU's, which contain more than one small workunit?
It looks like BOINC is not able to do them right on multiprocessor systems with the default 0.1 days cache.

When I got one of this workpackages, BOINC starts a WU on every core, but at the end, when only one WU is left, all other cores had to wait until the last WU is finished before BOINC starts to download new work.

Check your preferences and make sure you allow enough disk space to download another data file. If you don't allow enough space, it has to finish the old one before it will download a new one.

Seti Classic Final Total: 11446 WU.

Desti
Desti
Joined: 20 Aug 05
Posts: 117
Credit: 23762214
RAC: 0

RE: Check your

Message 58218 in response to message 58217

Quote:

Check your preferences and make sure you allow enough disk space to download another data file. If you don't allow enough space, it has to finish the old one before it will download a new one.

I have enough free disk space and I have allowed to use it all.

Desti
Desti
Joined: 20 Aug 05
Posts: 117
Credit: 23762214
RAC: 0

RE: Well, the 15MB file is

Message 58219 in response to message 58216

Quote:

Well, the 15MB file is the datapack, and they have more than one result's worth of work, regardless of the type. The other smaller files with the same root name are the actual results to run from it.

However if I'm reading your post right, you are correct that you should not get a "stall" for a new datapack because one core was working on the last result in the previous pack.

What were you getting on the message tab when this occured? Is this the first time you've seen this happen?

Alinator

I think this happend because of the Einstein downtimes. Later I saw a bunch of [---] Rescheduling CPU: files downloaded messages and then BOINC downloads enough work to keep all core running.

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