Hi All,
We have 3 Mac Pros with Leopard which we use to process data (version 4). Two of them process a brain in 30-36 hours, but one takes a week to process ONE brain if not more. While the processors are slightly different (3GHz vs 2.6), not amazingly so. This is seemingly the only difference. Does anyone have any ideas? All the machines are updated etc.
Marlisa
Have you looked at the brains? Is the one that takes a week correct, or does it have cerebellum or skull attached, or some other failure?
cheers, Bruce On Tue, 10 Jun 2008, Marlisa Isom wrote:
Hi All,
We have 3 Mac Pros with Leopard which we use to process data (version 4). Two of them process a brain in 30-36 hours, but one takes a week to process ONE brain if not more. While the processors are slightly different (3GHz vs 2.6), not amazingly so. This is seemingly the only difference. Does anyone have any ideas? All the machines are updated etc.
Marlisa
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
From a QC perspective, everything is fine. We aren't necessarily getting
any errors. All brains are taking this long, not just one.
Marlisa
Have you looked at the brains? Is the one that takes a week correct, or does it have cerebellum or skull attached, or some other failure?
cheers, Bruce On Tue, 10 Jun 2008, Marlisa Isom wrote:
Hi All,
We have 3 Mac Pros with Leopard which we use to process data (version 4). Two of them process a brain in 30-36 hours, but one takes a week to process ONE brain if not more. While the processors are slightly different (3GHz vs 2.6), not amazingly so. This is seemingly the only difference. Does anyone have any ideas? All the machines are updated etc.
Marlisa
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Marlisa,
The memory ( RAM) you have? My guess is if Freesurfer uses significant amount of swap, it becomes slow. Is it different from other 2 machines or the same order of magnitude?
If time permits, could you send the "Hardware Overview" information? ( Apple Icon in menubar->About this Mac->More Info... )
-Krish
On Jun 11, 2008, at 10:47 AM, Marlisa Isom wrote:
From a QC perspective, everything is fine. We aren't necessarily getting
any errors. All brains are taking this long, not just one.
Marlisa
Have you looked at the brains? Is the one that takes a week correct, or does it have cerebellum or skull attached, or some other failure?
cheers, Bruce On Tue, 10 Jun 2008, Marlisa Isom wrote:
Hi All,
We have 3 Mac Pros with Leopard which we use to process data (version 4). Two of them process a brain in 30-36 hours, but one takes a week to process ONE brain if not more. While the processors are slightly different (3GHz vs 2.6), not amazingly so. This is seemingly the only difference. Does anyone have any ideas? All the machines are updated etc.
Marlisa
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Hi Krish,
So all the machines have 4 GB of memory. However, the faster machine has 6 (4 x 512MB, 2 x1GB), whereas the slower ones are 1GB in 4. Possibly that's the bottleneck. All are 667 MHz regardless of machine. I'm thinking this could be the issue.
Marlisa
Marlisa,
The memory ( RAM) you have? My guess is if Freesurfer uses significant amount of swap, it becomes slow. Is it different from other 2 machines or the same order of magnitude?
If time permits, could you send the "Hardware Overview" information? ( Apple Icon in menubar->About this Mac->More Info... )
-Krish
On Jun 11, 2008, at 10:47 AM, Marlisa Isom wrote:
From a QC perspective, everything is fine. We aren't necessarily getting
any errors. All brains are taking this long, not just one.
Marlisa
Have you looked at the brains? Is the one that takes a week correct, or does it have cerebellum or skull attached, or some other failure?
cheers, Bruce On Tue, 10 Jun 2008, Marlisa Isom wrote:
Hi All,
We have 3 Mac Pros with Leopard which we use to process data (version 4). Two of them process a brain in 30-36 hours, but one takes a week to process ONE brain if not more. While the processors are slightly different (3GHz vs 2.6), not amazingly so. This is seemingly the only difference. Does anyone have any ideas? All the machines are updated etc.
Marlisa
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
-
Bruce Fischl -
Krish Subramaniam -
Marlisa Isom