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HugePages
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What are HugePages?
For an introduction for HugePages check [[ https://en.wikipedia.org/wiki/Page_%28computer_memory%29#Huge_pages |HugePage@Wiki ]]
Why use HugePages?
How to use HugePages?
The following hugepages are available on hazelhen:
craype-hugepages2M craype-hugepages32M craype-hugepages512M craype-hugepages4M craype-hugepages64M craype-hugepages8M craype-hugepages128M craype-hugepages16M craype-hugepages256M
If you want to use HugePages you have to do both of the steps below if you compile yourself.
Self compiled applications
- During Compilation
- one of the craype-hugepages<size> (i.e. craype-hugepages16M) modules has to be loaded.
- This will link the hugepages library to your application.
- During runtime
- Load the craype-hugepages<size> module with the pagesize you want to use.
- The size chosen during runtime is completely independent from the size you have chosen during compilation.
- Therefore you can compile once and test different sizes during runtime without changing the binary.