Third approach at caching optimizations implementation. The goal of reducing scope of cached data remains the same: First, optimize cache depth (i.e., omit caching rules or chains if not needed). Second, optimize cache width (i.e., cache only required chains). Changes since v2: * Move all cache-related code into a dedicated source file. * Replace have_cache boolean by a cache level, indicating cache completeness from a depth view. * Keep a central function to populate the cache, perform consistency checking based on generation ID and update cache level. The first two patches contain preparational work for the changes described above. Patch 3 performs the code relocation, patches 4 to 8 extend functionality of the separated caching code and the last three patches optimize core code in nft.c to put optimized caching into full effect. A follow-up series will deal with xtables-restore performance. Phil Sutter (11): nft: Pass nft_handle to flush_cache() nft: Avoid nested cache fetching nft: Extract cache routines into nft-cache.c nft-cache: Introduce cache levels nft-cache: Fetch only chains in nft_chain_list_get() nft-cache: Cover for multiple fetcher invocation nft-cache: Support partial cache per table nft-cache: Support partial rule cache per chain nft: Reduce cache overhead of nft_chain_builtin_init() nft: Support nft_is_table_compatible() per chain nft: Optimize flushing all chains of a table iptables/Makefile.am | 2 +- iptables/nft-cache.c | 498 +++++++++++++++++++++++++++++++++++++ iptables/nft-cache.h | 18 ++ iptables/nft.c | 487 +++++++----------------------------- iptables/nft.h | 22 +- iptables/xtables-restore.c | 5 +- iptables/xtables-save.c | 5 +- 7 files changed, 623 insertions(+), 414 deletions(-) create mode 100644 iptables/nft-cache.c create mode 100644 iptables/nft-cache.h -- 2.23.0
