RFR: 8256155: 2M large pages for code when LargePageSizeInBytes is set to 1G for heap [v2]
Marcus G K Williams
github.com+168222+mgkwill at openjdk.java.net
Thu Nov 19 03:06:08 UTC 2020
> Add 2M LargePages to _page_sizes
>
> Use 2m pages for large page requests
> less than 1g on linux when 1G are default
> pages
>
> - Add os::Linux::large_page_size_2m() that
> returns 2m as size
> - Add os::Linux::select_large_page_size() to return
> correct large page size for size_t bytes
> - Add 2m size to _page_sizes array
> - Update reserve_memory_special methods
> to set/use large_page_size based on bytes reserved
> - Update large page not reserved warnings
> to include large_page_size attempted
> - Update TestLargePageUseForAuxMemory.java
> to expect 2m large pages in some instances
>
> Signed-off-by: Marcus G K Williams <marcus.williams at intel.com>
Marcus G K Williams has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
Add 2M LargePages to _page_sizes
Use 2m pages for large page requests
less than 1g on linux when 1G are default
pages
- Add os::Linux::large_page_size_2m() that
returns 2m as size
- Add os::Linux::select_large_page_size() to return
correct large page size for size_t bytes
- Add 2m size to _page_sizes array
- Update reserve_memory_special methods
to set/use large_page_size based on bytes reserved
- Update large page not reserved warnings
to include large_page_size attempted
- Update TestLargePageUseForAuxMemory.java
to expect 2m large pages in some instances
Signed-off-by: Marcus G K Williams <marcus.williams at intel.com>
-------------
Changes: https://git.openjdk.java.net/jdk/pull/1153/files
Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1153&range=01
Stats: 105 lines in 3 files changed: 75 ins; 0 del; 30 mod
Patch: https://git.openjdk.java.net/jdk/pull/1153.diff
Fetch: git fetch https://git.openjdk.java.net/jdk pull/1153/head:pull/1153
PR: https://git.openjdk.java.net/jdk/pull/1153
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