llvm-project

Commit Graph

Author	SHA1	Message	Date
Keno Fischer	17433bd102	Fix performance problem in long-running SectionMemoryManagers Summary: Without this patch, the memory manager would call `mprotect` on every memory region it ever allocated whenever it wanted to finalize memory (i.e. not just the ones it just allocated). This caused terrible performance problems for long running memory managers. In one particular compile heavy julia benchmark, we were spending 50% of time in `mprotect` if running under MCJIT. Fix this by splitting allocated memory blocks into those on which memory permissions have been set and those on which they haven't and only running `mprotect` on the latter. Reviewers: lhames Subscribers: reames, llvm-commits Differential Revision: http://reviews.llvm.org/D13156 llvm-svn: 248981	2015-10-01 02:45:07 +00:00
Benjamin Kramer	efeddcc552	[SectionMemoryManager] Use range-based for loops. No functional change intended. llvm-svn: 246440	2015-08-31 13:39:14 +00:00
Lang Hames	8a6f35546b	[Orc] Move SectionMemoryManager's implementation from MCJIT to ExecutionEngine. This is a more sensible home for SectionMemoryManager, and allows the implementation to be shared between Orc and MCJIT. llvm-svn: 228427	2015-02-06 19:36:40 +00:00

Author

SHA1

Message

Date

Keno Fischer

17433bd102

Fix performance problem in long-running SectionMemoryManagers

Summary:
Without this patch, the memory manager would call `mprotect` on every memory
region it ever allocated whenever it wanted to finalize memory (i.e. not just
the ones it just allocated). This caused terrible performance problems for
long running memory managers. In one particular compile heavy julia benchmark,
we were spending 50% of time in `mprotect` if running under MCJIT.

Fix this by splitting allocated memory blocks into those on which memory
permissions have been set and those on which they haven't and only running
`mprotect` on the latter.

Reviewers: lhames

Subscribers: reames, llvm-commits

Differential Revision: http://reviews.llvm.org/D13156

llvm-svn: 248981

2015-10-01 02:45:07 +00:00

Benjamin Kramer

efeddcc552

[SectionMemoryManager] Use range-based for loops. No functional change intended.

llvm-svn: 246440

2015-08-31 13:39:14 +00:00

Lang Hames

8a6f35546b

[Orc] Move SectionMemoryManager's implementation from MCJIT to ExecutionEngine.

This is a more sensible home for SectionMemoryManager, and allows the implementation
to be shared between Orc and MCJIT.

llvm-svn: 228427

2015-02-06 19:36:40 +00:00

3 Commits