mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-29 18:33:58 +00:00
b550fc0b09
Summary:
__builtin_prefetch(...., 1) prefetches into the L2 cache on x86 while the same
emits a pldl3keep instruction on arm64 which doesn't seem to be close enough.
Testing on a Graviton3, and M1 system with memtablerep_bench fillrandom and
skiplist througpuh increased as follows adjusting the 1 to 2 or 3:
```
1 -> 2 1 -> 3
----------------------------
Graviton3 +10% +15%
M1 +10% +10%
```
Given that prefetching into the L1 cache seems to help, I chose that conversion
Pull Request resolved: https://github.com/facebook/rocksdb/pull/10117
Reviewed By: pdillinger
Differential Revision: D37120475
fbshipit-source-id: db1ef43f941445019c68316500a2250acc643d5e
|
||
|---|---|---|
| .. | ||
| win | ||
| jemalloc_helper.h | ||
| lang.h | ||
| likely.h | ||
| malloc.h | ||
| port.h | ||
| port_dirent.h | ||
| port_example.h | ||
| port_posix.cc | ||
| port_posix.h | ||
| README | ||
| stack_trace.cc | ||
| stack_trace.h | ||
| sys_time.h | ||
| util_logger.h | ||
| xpress.h | ||
This directory contains interfaces and implementations that isolate the rest of the package from platform details. Code in the rest of the package includes "port.h" from this directory. "port.h" in turn includes a platform specific "port_<platform>.h" file that provides the platform specific implementation. See port_posix.h for an example of what must be provided in a platform specific header file.