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Beyond Malloc Efficiency to Fleet Efficiency - A Hugepage-Aware Memory Allocator
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- 1 Intro
- 2 normally reducing malloc cycles is good
- 3 business logic changes, infrastructure does not
- 4 malloc cycles do not matter. $$$ spent on hardware matter.
- 5 most cpu cycles do nothing
- 6 hugepages cheapen the page table walk
- 7 hugepages make the TLB bigger!
- 8 space efficient hugepage aware allocators are hard
- 9 demand oscillates wildly
- 10 emptying density - binpacking
- 11 mistakes can live forever
- 12 tcmalloc structure
- 13 spans back everything
- 14 change nothing but the page heap
- 15 Temeraire: the design
- 16 slack and donation
- 17 how does the HugeFiller make decisions?
- 18 HugeFiller tracks metadata per hugepage
- 19 we favor fragmentation over fullness
- 20 results
- 21 staged rollout
- 22 saved -1.3% of cycles
- 23 saving memory in the process
- 24 virtuous cycles: hugepage coverage
