GPU & CPU in use?


log in

Advanced search

Questions and Answers : Macintosh : GPU & CPU in use?

Author Message
Profile Machina
Send message
Joined: 19 Feb 11
Posts: 2
Credit: 460,065
RAC: 0
United States
Message 1301115 - Posted: 2 Nov 2012, 1:22:03 UTC

10.6.8 / MacPro / NVIDIA GeForce 8800 GT (512) / Seti@home only

As I understand it, a single Boinc project will either run on the GPU or the CPU but not both. As stated above, I am only running Seti but it seems that both are in use.

Prefs are set to use 100% of all the CPUs (which it is) but the WUs are completing MUCH faster than before I upgraded to the CUDA card. BOINC recognizes the GPUs and when I view properties for Seti in the manager, it states that GPU work is deferred for various hours but not for CPU work.

The NVIDIA card heats up during crunching, which makes me wonder if I am using both or is the GPU even in use at all?

Thanks for the help.

Profile arkaynProject donor
Volunteer tester
Avatar
Send message
Joined: 14 May 99
Posts: 3654
Credit: 48,600,677
RAC: 2,355
United States
Message 1301136 - Posted: 2 Nov 2012, 2:53:25 UTC

Since you are running stock apps and there is no stock GPU app for OSX, you are definitely not using it.

Currently there are a couple of projects that do have CUDA apps for OSX.

Collatz and Primegrid that I know of for sure.
____________

Profile Machina
Send message
Joined: 19 Feb 11
Posts: 2
Credit: 460,065
RAC: 0
United States
Message 1301206 - Posted: 2 Nov 2012, 7:55:42 UTC - in response to Message 1301136.

Somehow I missed that information. I won't worry then. Thank you for your help.

Profile BilBg
Volunteer tester
Avatar
Send message
Joined: 27 May 07
Posts: 2713
Credit: 6,148,524
RAC: 5,706
Bulgaria
Message 1301873 - Posted: 4 Nov 2012, 0:03:56 UTC - in response to Message 1301115.

As I understand it, a single Boinc project will either run on the GPU or the CPU but not both.

Wrong - any project will use all devices it have app for (unless you set the opposite):
http://setiathome.berkeley.edu/prefs.php?subset=project

(Try to run SETI@home or Einstein@Home or ... on Windows computer which have both NVIDIA and ATI GPUs - the tasks/apps will/may run on CPU + 2 GPUs simultaneously (every device with its own task))

The (stock) apps available now at/for SETI@home:
http://setiathome.berkeley.edu/apps.php


Your tasks are for CPU:
http://setiathome.berkeley.edu/results.php?hostid=5821300&offset=0&show_names=0&state=2&appid=

(if they were for GPU they would have in the name NVIDIA or cuda or ATI or opencl
http://setiathome.berkeley.edu/workunit.php?wuid=1103407304
http://setiathome.berkeley.edu/results.php?hostid=5948046&offset=0&show_names=0&state=3&appid=
http://setiathome.berkeley.edu/results.php?hostid=4832843&offset=0&show_names=0&state=2&appid=
)

Since you have:
Intel(R) Xeon(R) CPU 5150 @ 2.66GHz
Number of processors 4

... you have to see 4 CPU tasks running
(CPU tasks do not use GPU at all and GPU can't make them run faster)


____________



- ALF - "Find out what you don't do well ..... then don't do it!" :)

Profile eteela
Send message
Joined: 27 Aug 12
Posts: 16
Credit: 2,065,111
RAC: 1,591
United States
Message 1303909 - Posted: 9 Nov 2012, 8:21:34 UTC - in response to Message 1301115.
Last modified: 9 Nov 2012, 8:26:33 UTC

I havn't seen anyone yet reporting that they got SETI running on a mac gpu, yet. So instead I loaded,

Einstein@home works well on my AMD GPU (1600 RAC) Einstein only uses .5% of one CPU core to keep the GPU happy.

I run SETI on my CPU's 4 cores (4900 RAC last month),


Optimized seti app from http://www.arkayn.us/forum/index.php?action=tpmod;dl=cat4

iMac (mid 2011) i5-2400S CPU @ 2.50GHz (mid 2011) AMD Radeon HD 6750M
57c/135f 2000rpm fans-nice and quiet while using all 4 cores 100%
kinda hard to tell how much of GPU is being used on the mac (anyone got any suggestions?)

Questions and Answers : Macintosh : GPU & CPU in use?

Copyright © 2014 University of California