[AMBER] selecting a gpu device in multiple gpu system

From: 홍종희 <croshong.nate.com>
Date: Wed, 21 Nov 2012 19:42:38 +0900

    Dear Amber users


   My name is jong hui hong in Korea


    Hi recently We have installed Amber12


   and It seems to works quiet well


   But in case of multiple GPU card system, our ssystem has a problem in
   selecting


   a specific GPU device


   suppose We have 3 GPU card


   [user1.cs-g ~]$ deviceQueryDrv -noprompt | egrep "^Device"
   Device 0: "Tesla C2075"
   Device 1: "Tesla C2075"
   Device 2: "Tesla C2075"


   If I wanto select device 0

   [user1.cs-g ~]$ export CUDA_VISIBLE_DEVICES="0"
   [user1.cs-g ~]$ deviceQueryDrv -noprompt | egrep "^Device"
   Device 0: "Tesla C2075"

   It;s OK


   But If I want select device 1

   [user1.cs-g ~]$ export CUDA_VISIBLE_DEVICES="1"
   [user1.cs-g ~]$ deviceQueryDrv -noprompt | egrep "^Device"
   Device 0: "Tesla C2075"

   even I set the CUDA_VISIBLE_DEVICES to 1

   It only shows Deice 0


   If I want to select device 0,1

   [user1.cs-g ~]$ deviceQueryDrv -noprompt | egrep "^Device"
   Device 0: "Tesla C2075"
   Device 1: "Tesla C2075"


   It show both of them


   But In case of I want to select device 0,2

   [user1.cs-g ~]$ export CUDA_VISIBLE_DEVICES="0,2"
   [user1.cs-g ~]$ deviceQueryDrv -noprompt | egrep "^Device"
   Device 0: "Tesla C2075"
   Device 1: "Tesla C2075"


   even I set CUDA_VISIBLE_DEVICES to 0,2

   It still shows device 0,1


   I think there's somethin's wrong with cuda setup in our system, but I can
   not manage at all..


   Any kind of suggestion would be reall appreciated.


   Best Regards


   Jong hui


   [?usn=13646389&email=croshong.nate.com&key=dc8a17ea8fa5db6b89fb11119905a9a4$
   2d84fe89.mail3.nate.com]
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Received on Wed Nov 21 2012 - 03:00:02 PST
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