Posts by enels

1) Message boards : BOINC client : Hyperthreading / SMT support (Message 21307)
Posted 17 Nov 2008 by enels
Sharing a BOINC thread with a higher priority thread on the same core will slow down the higher priority thread. I certainly noticed this on P4s and would regularly pause DC projects when I didn't want to share the core.

BOINC thankfully has an 'only run after idle X minutes' setting that can avoid this problem with regular user input, but doesn't apply to video play back, for example.

Ideally I would like to be able to tell the kernel scheduler to never schedule a BOINC thread alongside a higher priority thread on the same core. Is this possible with any BOINC/OS combination now or is it planned for Atom , i7 or in general?
2) Message boards : BOINC client : GPUgrid polluting CPU statistics? (Message 21148)
Posted 6 Nov 2008 by enels
It appears that BOINC is crediting GPU produced work to the CPU it happens to be running on.

You can see what I mean here:

The average credit/second for the Q6600 is 10 times higher than its combined average over projects, even though the GPUgrid only uses a few percent of the Q6600.
3) Message boards : Questions and problems : Multiple Name Problem (Message 20365)
Posted 19 Sep 2008 by enels

I attached to the WCG on the computer I'm running the PS3grid on, and I'll see if they sync up.
4) Message boards : Questions and problems : Multiple Name Problem (Message 20354)
Posted 19 Sep 2008 by enels
I joined the PS3grid with the same e-mail address and password that I used to sign up with the WCG.

BOINC still doesn't see me as having joined the PS3grid, but my name shows up twice in BAM. One with WCG credit, the other with PS3grid credit. BAM doesn't show the PS3grid one as belonging to a team, although the PS3grid correctly identifies the team I joined and I show up on the team list.

The CPIDs I have for the WCG and PS3grid are different, even though I joined both with the same e-mail and password.

Any ideas on how to fix this? Is there some trick to joining multiple projects as the same user?

5) Message boards : Promotion : searching for BOINC instead of bookmarking (Message 18299)
Posted 8 Jul 2008 by enels
Instead of bookmarking BOINC I do a google search for BOINC. I do the same for 'world community grid'.

It isn't much more difficult with auto-complete.

I don't know if it helps, but it is my understanding that google keeps track of popular searches.

6) Message boards : Promotion : How can we address BOINC's retention problem? (Message 18298)
Posted 8 Jul 2008 by enels
I've also lately been thinking about the poor retention rate of DC participants. It could be the electricity costs drive people away. 30 days is long enough for Americans at least to get an electricity bill. 100 watts 24/7 would cost about $7-10 month. Many people will notice this increase.

Even if they can afford the electricity, they might be turned off by the resulting heat. I've read in more than one forum people turning off their machines because their computer room is just too hot. I can understand this. Some years I've quit participating in DC projects when the air conditioning is running.

Even if they can afford the electricity and stand the heat, they may be turned off by the resulting fan noise. Instead of building computers to be relatively quiet at all times, computer makers have designed computers to be relatively quiet when idle. The fan noise some computers emit when running full blast is simply unbearable for many people.

But I am speculating. I don't know of any survey of ex DC participants inquiring about why they stopped. But it is a great question and something that should be investigated. Something attracted them to DC, but why only for 30 days?

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