[iptables,v3,00/11] Improve iptables-nft performance with large rulesets
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Message ID 20191008161447.6595-1-phil@nwl.cc
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  • Improve iptables-nft performance with large rulesets
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Phil Sutter Oct. 8, 2019, 4:14 p.m. UTC
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