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Key: VWR-25
Type: Bug Bug
Status: Reopened Reopened
Priority: Major Major
Assignee: Unassigned
Reporter: lawrence linden
Votes: 4
Watchers: 1
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1. Second Life Viewer - VWR

Process affinity problem causes severe frame rate drop on multi-core systems

Created: 12/Jan/07 11:58 AM   Updated: 08/Jul/09 06:31 AM
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Component/s: Performance
Affects Version/s: 1.22, 1.23
Fix Version/s: None

File Attachments: 1. Text File process_affinity.patch (3 kB)
Environment: Win32 build, on Windows XP x64 on AMD Athlon X2 or Intel Core 2 Duo CPUs in minimal power management mode with NVidia 8800GTX, NVidia 7600GS or ATI X850XT using any of the last few driver revisions

Linden Lab Issue ID: SL-33466


 Description  « Hide
Observation from my Intel Core 2 Duo E6600 based machine with 8800GTX:
  • launch Second Life
  • connect
  • observe frame rate of about n FPS
  • using task manager force SL to run on CPU core #0
  • observe frame rate of about 2*n FPS
  • using task manager force SL to run on both CPU core #0 and #1
  • observe frame rate of about 3*n FPS
    If you repeat the above experiment without connecting to SL first then once you
    connect to SL your framerate will still be about 1/3 of what it should be.

I'm attaching a patch for an automated work-around to this problem. I'm not happy with it, but figured I'd throw it out there as a starting point for others. I don't have time to pursue a better solution at this time.

 All   Comments   Change History      Sort Order: Ascending order - Click to sort in descending order
Second Life Admin made changes - 24/Jan/07 03:18 PM
Field Original Value New Value
Linden Lab Issue ID SL-33466
Gigs Taggart made changes - 02/Sep/07 11:12 AM
Status Open [ 1 ] Resolved [ 5 ]
Resolution Fixed [ 1 ]
Rob Linden made changes - 22/Dec/07 02:32 AM
Workflow jira [ 10061 ] jira-2007-12-21 [ 25934 ]
Rob Linden made changes - 22/Dec/07 02:44 AM
Workflow jira [ 25934 ] jira-2007-12-21 [ 26614 ]
Rob Linden made changes - 22/Dec/07 03:30 PM
Workflow jira-2007-12-21 [ 26614 ] jira-2007-12-22 [ 33011 ]
Rob Linden made changes - 22/Dec/07 03:53 PM
Workflow jira-2007-12-21 [ 33011 ] jira-2007-12-22 [ 35063 ]
Rob Linden made changes - 22/Dec/07 08:52 PM
Workflow jira-2007-12-22 [ 35063 ] jira-2007-12-22a [ 40194 ]
Rob Linden made changes - 22/Dec/07 10:08 PM
Workflow jira-2007-12-22 [ 40194 ] jira-2007-12-22a [ 44171 ]
Rob Linden made changes - 22/Dec/07 10:31 PM
Workflow jira-2007-12-22 [ 44171 ] jira-2007-12-22a [ 45523 ]
Sue Linden made changes - 13/Nov/08 11:10 AM
Workflow jira-2007-12-22a [ 45523 ] jira-2008-11-14 [ 65192 ]
Sue Linden made changes - 13/Nov/08 11:34 AM
Workflow jira-2007-12-22a [ 65192 ] jira-2008-11-14 [ 73664 ]
Sue Linden made changes - 13/Nov/08 05:06 PM
Workflow jira-2008-11-14 [ 73664 ] jira-2008-11-14a [ 99232 ]
Sue Linden made changes - 13/Nov/08 05:21 PM
Workflow jira-2008-11-14 [ 99232 ] jira-2008-11-14a [ 105091 ]
Sue Linden made changes - 13/Nov/08 05:30 PM
Workflow jira-2008-11-14 [ 105091 ] jira-2008-11-14a [ 108943 ]
Sue Linden made changes - 13/Nov/08 05:49 PM
Workflow jira-2008-11-14 [ 108943 ] jira-2008-11-14a [ 114762 ]
Sue Linden made changes - 13/Nov/08 06:20 PM
Workflow jira-2008-11-14 [ 114762 ] jira-2008-11-14a [ 126298 ]
Sue Linden made changes - 13/Nov/08 06:47 PM
Workflow jira-2008-11-14 [ 126298 ] jira-2008-11-14a [ 136727 ]
Moon Metty made changes - 10/Jan/09 02:02 PM
Resolution Fixed [ 1 ]
Status Resolved [ 5 ] Reopened [ 4 ]
Ellla McMahon made changes - 08/Jul/09 06:28 AM
Affects Version/s 1.23 [ 10470 ]
Affects Version/s 1.22 [ 10430 ]

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