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World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: Running on netbooks |
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Thread Status: Active Total posts in this thread: 21
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Thanks and interesting... think to have seen an I7-620M and a I5-540M and or 520M lurking in the Saturn shop. Whilst I like my VAIO, the space bar has always been a problem... what's the point of a ''space'' bar if it always has to be hit square in the middle. Half the leds of different indicators have also gone... but it has been running none-stop pretty much for 4 years and crunching on the go. It will be Intel, there's no compromise on that.
----------------------------------------edit: will try buying a naked laptop... no OS, move the licensed W7 onto that in dual boot, then turn the old laptop into a Linux cruncher... 2x faster HCC... 1.6 times faster C4CW... that's what it will do... that is if Linux 32 bit v Windows 7 - 32 has the same performance ratio.
WCG
----------------------------------------Please help to make the Forums an enjoyable experience for All! [Edit 2 times, last edit by Sekerob at Oct 27, 2010 2:56:10 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
In practical terms, it means CPUs that consume less energy and run cooler than a comparable 45nm (or older) chip.
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges: 
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From a price/performance point of view, I decided to try AMD Phenom II x6 for replacing an old P4 HT which died one month ago.
----------------------------------------I can only recommend this 6 core CPU. It runs fine and does a good work. Probably it is not the most powerful CPU, but it costs a quarter of a comparable i7. Currently, without any OC measure and based on the daily granted boinc credits, the CPU (2.8 GHz) performs around 90% of the work performed by a double Quad Xeon (i.e. 8 cores) with 2.33 GHz. The Phenom host is currently running Win XP Pro SP3; however I plan to move to Ubuntu 10.04 in a near future. My current feeling is that the Phenom is constantly a little bit under granted regarding boinc credit (around 10%) in comparison to Q9xxx. Cheers, Yves --- PS: I would like being able to run a Magny Cours CPU ! ...  PPS: For Intel CPU, I fully agree with the 32nm recommendation. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Would atom processors claim a lot less credit for some reason? Another machine with the same CPU time (6.00) on a HCMD2 WU claimed 172.2 credits and was granted 184.6 while mine only claimed 24.0 and was granted 22.5.
----------------------------------------[Edit 1 times, last edit by Former Member at Oct 30, 2010 10:37:39 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Since my laptop is slowly going... completely worn mouse pad, shaky power connector, battery no longer charging... will be looking soon for a replacement. What has an duo hyperthreaded CPU... I3 / i5 xxx ? an I5 750m or is the 520M maybe a better choice... lower power and comparible speed... maybe one that has this turbo function? [OT]Hey Sek, since your laptop has seen better days may I suggest buying a Macbook? Then you can be the expert BOINC guy on all three major platforms. Yes? Just a thought. [/OT]  |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
and yes I would turn HT off Don't ever turn HT off in the BIOS. Just adjust the BOINC client to use 50% of the CPU. Turning of HT will actually hurt your crunching on your active threads. |
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kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges: 
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Would atom processors claim a lot less credit for some reason? Another machine with the same CPU time (6.00) on a HCMD2 WU claimed 172.2 credits and was granted 184.6 while mine only claimed 24.0 and was granted 22.5. Yes. The credit is supposed to measure the amount of computing actually done. (It's not a perfect measure, but that's what it's trying to do.) Since HCMD2 WUs are stopped after 6 hrs CPU time, a fast processor will have accomplished more calculations in that time than a slower one like an Atom. Therefore, the Atom should claim and receive less credit. I think it's neat that WCG keeps track of our runtime as well as points.  |
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kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges:
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I set up a device profile to limit the netbook to those three projects. One of the HPF WUs finished and a HCC WU started that presently has a shorter ETA than the other HPF WU. When I have some time I'll experiment with whether it works better with HT on or off. What's the best way to go about this? I ran a comparison. I used C4CW, since its work units are so consistent in time to completion. On my dual core Atom D525 running 4 at a time with HT on: 14.6 hrs per WU running 2 at a time 11.4 hrs per WU To run 2 at a time, I didn't turn off HT in the BIOS. I just set in the device profile to use at most 2 processors/50% of processors. In any case, the machine was getting a lot more crunching done running 4 at a time. It could complete 6.57 WUs per day that way, versus only 4.21 per day running 2 at a time. I am pleasantly surprised that hyperthreading is that good! By the way, C4CW WU times might change in the near future, as I believe we are about to move from target 2 to target 3. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello kateiacy,
I am pleasantly surprised that hyperthreading is that good! I will risk pontificating my personal opinion (which may be foolish). I think that hyperthreading is most efficient when used with certain SSE instructions (commonly used for video processing) or when used with programs which challenge the cache on the computer. Having a page from another program all set up ready to run avoids a lot of down time while staging up a page to the cache. How much cache does a core have on your Atom as compared to a I7 / I5 / I3 CPU?  Lawrence |
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kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges:
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Hello kateiacy, I am pleasantly surprised that hyperthreading is that good! I will risk pontificating my personal opinion (which may be foolish). I think that hyperthreading is most efficient when used with certain SSE instructions (commonly used for video processing) or when used with programs which challenge the cache on the computer. Having a page from another program all set up ready to run avoids a lot of down time while staging up a page to the cache. How much cache does a core have on your Atom as compared to a I7 / I5 / I3 CPU? Lawrence I suspect you've hit the nail on the head. I hang out on these forums because I always learn from the comments. The Atom D525 has 1 MB cache for its two cores, vs 4 MB cache for a Core I3 and 8MB cache for a Core I5. If I ever have a machine with one of those processors, I'll have to repeat my test! |
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