Building Blocks for 64-bit AMD Opteron Clusters - Linux Clusters ...
Building Blocks for 64-bit AMD Opteron Clusters - Linux Clusters ...
Building Blocks for 64-bit AMD Opteron Clusters - Linux Clusters ...
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Increased Memory <strong>for</strong> 32-<strong>bit</strong> Applications<br />
32-<strong>bit</strong> server, 4 GB DRAM<br />
• OS & App share small<br />
32-<strong>bit</strong> VM space<br />
• 32-<strong>bit</strong> OS & applications<br />
all share 4GB DRAM<br />
• Leads to small dataset<br />
sizes & lots of paging<br />
0 GB<br />
2 GB<br />
4 GB<br />
Virtual<br />
Memory<br />
32-<strong>bit</strong><br />
App<br />
32-<strong>bit</strong><br />
OS<br />
4GB<br />
DRAM<br />
Shared<br />
Virtual<br />
Memory<br />
32-<strong>bit</strong><br />
App<br />
32-<strong>bit</strong><br />
OS<br />
0 GB<br />
2 GB<br />
4 GB<br />
<strong>64</strong>-<strong>bit</strong> server, 12 GB DRAM<br />
• App has exclusive use of<br />
32-<strong>bit</strong> VM space<br />
• <strong>64</strong>-<strong>bit</strong> OS can allocate<br />
each application large<br />
dedicated portions<br />
of 12GB DRAM<br />
• OS uses VM space way<br />
above 32-<strong>bit</strong>s<br />
• Leads to larger dataset<br />
sizes & reduced paging<br />
0 GB 0 GB<br />
4 GB<br />
256 TB<br />
Virtual<br />
Memory<br />
32-<strong>bit</strong><br />
App<br />
<strong>64</strong>-<strong>bit</strong><br />
OS<br />
12GB<br />
DRAM<br />
Not<br />
shared<br />
Not<br />
shared<br />
Not<br />
shared<br />
Virtual<br />
Memory<br />
32-<strong>bit</strong><br />
App<br />
<strong>64</strong>-<strong>bit</strong><br />
OS<br />
4 GB<br />
256 TB<br />
36
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