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order (which is the standard for MITgcm single-precision MDSIO |
order (which is the standard for MITgcm single-precision MDSIO |
| 10 |
output) |
output) |
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|
| 12 |
- the machine itself is a LITTLE-endian architecture such as: |
- the machine running the "average_fields" program is a |
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LITTLE-endian architecture such as: |
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|
| 15 |
- IA32 (Intel or AMD x86-compatible) |
- IA32 (Intel or AMD x86-compatible) |
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- Linux on IA64 (eg. Altixes) |
- Linux on IA64 (eg. Altixes) |
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The program syntax is: |
The program syntax is: |
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|
|
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$ make average_fields |
$ make average_fields |
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$ ./average_fields field_1 field_3 ... field_n output_field |
$ ./average_fields field_1 field_3 ... field_n output_field |
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|
| 25 |
The additional scripts demonstrate how to easily run N simultaneous |
Two additional scripts ("do_the_averages" and "job_ave") demonstrate |
| 26 |
copies of the average_fields program on an Altix system such as |
how to easily run N simultaneous average_fields programs within either |
| 27 |
Columbia. |
interative (the former) or queue-driven (the latter) environments. |
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NOTE: |
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Outputs from this program can differ slightly from machine to machine |
| 33 |
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due to rounding errors. The intermediate sums are computed internally |
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at double precision and converted to single precision immediately |
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before being written. Both IA32 and IA64 machines have been compared |
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and the differences (when there are any!) all appear to be acceptable |
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within the slightly different rounding inherent with these two |
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architectures. |
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