Dual core CPU question

Author	Message
Marsh Send message Joined: 10 Jan 08 Posts: 8 Credit: 568,113 RAC: 0	Message 712626 - Posted: 14 Feb 2008, 22:26:48 UTC hi for a while i have been running seti@home on my core2duo 6750 and up until last night it was running 2 threads at 100% cpu usage per core, now i only have 1 thread working, is this an error woth boinc or maybe something else ? ID: 712626 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 712630 - Posted: 14 Feb 2008, 22:38:25 UTC - in response to Message 712626. hi for a while i have been running seti@home on my core2duo 6750 and up until last night it was running 2 threads at 100% cpu usage per core, now i only have 1 thread working, is this an error woth boinc or maybe something else ? Check your preference settings regarding 'use at most' XX cpus. Did it accidentally get changed on Seti? Did you recently join another project and is it set to use only 1 cpu? I believe the most recent change takes precedence. "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 712630 ·

Marsh Send message Joined: 10 Jan 08 Posts: 8 Credit: 568,113 RAC: 0	Message 712638 - Posted: 14 Feb 2008, 22:47:31 UTC forgive me for being a n00b but where can i find this 'use xx cores' setting, its currently set to 100% cpu usage. thanks. ID: 712638 ·

Marsh Send message Joined: 10 Jan 08 Posts: 8 Credit: 568,113 RAC: 0	Message 712641 - Posted: 14 Feb 2008, 22:49:41 UTC ahh i see it, its under the webpage settings, its currently set to 16 cores maximum. ID: 712641 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 712644 - Posted: 14 Feb 2008, 22:54:57 UTC - in response to Message 712641. ahh i see it, its under the webpage settings, its currently set to 16 cores maximum. Crunching Seti only? If so, that is not the problem.... Have you shut down and restarted Boinc and/or rebooted? "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 712644 ·

Marsh Send message Joined: 10 Jan 08 Posts: 8 Credit: 568,113 RAC: 0	Message 712647 - Posted: 14 Feb 2008, 22:58:20 UTC yes i have restarted and its still only running on 1 core, it is perhaps a problem to do with getting data from the server, only very few tasks have come in today. ID: 712647 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 712649 - Posted: 14 Feb 2008, 23:03:22 UTC - in response to Message 712647. yes i have restarted and its still only running on 1 core, it is perhaps a problem to do with getting data from the server, only very few tasks have come in today. When you go to the 'tasks' tab in your Boinc manager, does it show any WUs 'ready to start' other than the one that is running? "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 712649 ·

Marsh Send message Joined: 10 Jan 08 Posts: 8 Credit: 568,113 RAC: 0	Message 712650 - Posted: 14 Feb 2008, 23:06:37 UTC there are 5 in total, 4 at 100% completed and 1 just started. ID: 712650 ·

Marsh Send message Joined: 10 Jan 08 Posts: 8 Credit: 568,113 RAC: 0	Message 712653 - Posted: 14 Feb 2008, 23:08:26 UTC ohh something strange just happened, on the only thread running i clicked on 'show graphics' then just a minute after that about another 10 got added to the que and now i have both cores up and running again :) ID: 712653 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 712655 - Posted: 14 Feb 2008, 23:10:37 UTC - in response to Message 712653. Last modified: 14 Feb 2008, 23:21:40 UTC ohh something strange just happened, on the only thread running i clicked on 'show graphics' then just a minute after that about another 10 got added to the que and now i have both cores up and running again :) Wonderful...that was the answer....you simply had only one WU in your cache to process....you may want to bump up your cache settings just a teeny bit to have a little more work on hand when things get bumpy with the servers..... Happy crunching!! "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 712655 ·

Jasen Send message Joined: 3 Jan 08 Posts: 8 Credit: 43,827 RAC: 0	Message 713066 - Posted: 15 Feb 2008, 19:07:36 UTC I have a question about the intel core2. I am looking to purchase a core2 quad q6600 2.4ghz cpu, for a sytem i'm building. Now is my understanding correct that i should be able to run 4 tasks at a time with this cpu? ID: 713066 ·

Fred W Volunteer tester Send message Joined: 13 Jun 99 Posts: 2524 Credit: 11,954,210 RAC: 0	Message 713069 - Posted: 15 Feb 2008, 19:10:37 UTC - in response to Message 713066. I have a question about the intel core2. I am looking to purchase a core2 quad q6600 2.4ghz cpu, for a sytem i'm building. Now is my understanding correct that i should be able to run 4 tasks at a time with this cpu? Yes. F. ID: 713069 ·

Jasen Send message Joined: 3 Jan 08 Posts: 8 Credit: 43,827 RAC: 0	Message 713071 - Posted: 15 Feb 2008, 19:18:40 UTC So is there really an advantage to having two physical cpus? ID: 713071 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 713079 - Posted: 15 Feb 2008, 19:32:18 UTC - in response to Message 713071. So is there really an advantage to having two physical cpus? An advantage over what? What are you comparing to? "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 713079 ·

Richard Haselgrove Volunteer tester Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874	Message 713083 - Posted: 15 Feb 2008, 19:35:54 UTC - in response to Message 713069. I have a question about the intel core2. I am looking to purchase a core2 quad q6600 2.4ghz cpu, for a sytem i'm building. Now is my understanding correct that i should be able to run 4 tasks at a time with this cpu? Yes. F. Provided you run Linux, Windows Vista, Windows XP, or a server OS on it. Windows 2000 Professional will only run 2 tasks. ID: 713083 ·

Jasen Send message Joined: 3 Jan 08 Posts: 8 Credit: 43,827 RAC: 0	Message 713089 - Posted: 15 Feb 2008, 19:48:30 UTC - in response to Message 713079. So is there really an advantage to having two physical cpus? An advantage over what? What are you comparing to? sorry, physical cpus over a quad core ID: 713089 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 713102 - Posted: 15 Feb 2008, 19:51:17 UTC - in response to Message 713083. I have a question about the intel core2. I am looking to purchase a core2 quad q6600 2.4ghz cpu, for a sytem i'm building. Now is my understanding correct that i should be able to run 4 tasks at a time with this cpu? Yes. F. Provided you run Linux, Windows Vista, Windows XP, or a server OS on it. Windows 2000 Professional will only run 2 tasks. Yes, that's true....I was running Win2k on most of my c2d's, and had to upgrade when it was time to go to quads.... I now run XP on one, XP x64 on one, and Win2k Advanced Server on the other two. "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 713102 ·

ML1 Volunteer moderator Volunteer tester Send message Joined: 25 Nov 01 Posts: 20283 Credit: 7,508,002 RAC: 20	Message 713133 - Posted: 15 Feb 2008, 20:36:51 UTC - in response to Message 713089. Last modified: 15 Feb 2008, 20:37:18 UTC So is there really an advantage to having two physical cpus? An advantage over what? What are you comparing to? sorry, physical cpus over a quad core Memory bandwidth... One or two Northbridges if you're on Intel?... Dual channel or quad channel?... Also consider the motherboard cost & CPU(s) cost... It all depends on what you want to do. Do you want to move data around or just do s@h crunchin'? Or a mix of all things? Good luck, Martin See new freedom: Mageia Linux Take a look for yourself: Linux Format The Future is what We all make IT (GPLv3) ID: 713133 ·

Jasen Send message Joined: 3 Jan 08 Posts: 8 Credit: 43,827 RAC: 0	Message 713145 - Posted: 15 Feb 2008, 20:54:37 UTC - in response to Message 713133. So is there really an advantage to having two physical cpus? An advantage over what? What are you comparing to? sorry, physical cpus over a quad core Memory bandwidth... One or two Northbridges if you're on Intel?... Dual channel or quad channel?... Also consider the motherboard cost & CPU(s) cost... It all depends on what you want to do. Do you want to move data around or just do s@h crunchin'? Or a mix of all things? Good luck, Martin here's what i'm looking to put together -intel c2Q q6600 2.4gkz -2g corsair dual channel DDR2 800mhz -seagate 160g sata hd -xfx 256mb video card -windows xp home ID: 713145 ·

kittyman Volunteer tester Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004	Message 713152 - Posted: 15 Feb 2008, 21:10:15 UTC - in response to Message 713145. So is there really an advantage to having two physical cpus? An advantage over what? What are you comparing to? sorry, physical cpus over a quad core Memory bandwidth... One or two Northbridges if you're on Intel?... Dual channel or quad channel?... Also consider the motherboard cost & CPU(s) cost... It all depends on what you want to do. Do you want to move data around or just do s@h crunchin'? Or a mix of all things? Good luck, Martin here's what i'm looking to put together -intel c2Q q6600 2.4gkz -2g corsair dual channel DDR2 800mhz -seagate 160g sata hd -xfx 256mb video card -windows xp home Should build a nice cruncher..... Only snag, and I am still trying to verify, but I am not sure if XP Home Edition will support a quad or only a dual core...... "Freedom is just Chaos, with better lighting." Alan Dean Foster ID: 713152 ·

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