nimbus-eth1/nimbus/db/kvt
Jacek Sieka 768307d91d
Cache code and invalid jump destination tables (fixes #2268) (#2404)
It is common for many accounts to share the same code - at the database
level, code is stored by hash meaning only one copy exists per unique
program but when loaded in memory, a copy is made for each account.

Further, every time we execute the code, it must be scanned for invalid
jump destinations which slows down EVM exeuction.

Finally, the extcodesize call causes code to be loaded even if only the
size is needed.

This PR improves on all these points by introducing a shared
CodeBytesRef type whose code section is immutable and that can be shared
between accounts. Further, a dedicated `len` API call is added so that
the EXTCODESIZE opcode can operate without polluting the GC and code
cache, for cases where only the size is requested - rocksdb will in this
case cache the code itself in the row cache meaning that lookup of the
code itself remains fast when length is asked for first.

With 16k code entries, there's a 90% hit rate which goes up to 99%
during the 2.3M attack - the cache significantly lowers memory
consumption and execution time not only during this event but across the
board.
2024-06-21 09:44:10 +02:00
..
kvt_delta Triggered write event for kvt (#2351) 2024-06-13 18:15:11 +00:00
kvt_desc Cache code and invalid jump destination tables (fixes #2268) (#2404) 2024-06-21 09:44:10 +02:00
kvt_init Cache code and invalid jump destination tables (fixes #2268) (#2404) 2024-06-21 09:44:10 +02:00
kvt_tx Triggered write event for kvt (#2351) 2024-06-13 18:15:11 +00:00
kvt_walk Aristo: Update unit test suite (#2002) 2024-02-01 21:27:48 +00:00
kvt_api.nim Cache code and invalid jump destination tables (fixes #2268) (#2404) 2024-06-21 09:44:10 +02:00
kvt_constants.nim Core db use differential tx layers for aristo and kvt (#1949) 2023-12-19 12:39:23 +00:00
kvt_debug.nim Aristo db kvt maintenance update (#1952) 2023-12-20 16:19:00 +00:00
kvt_delta.nim Triggered write event for kvt (#2351) 2024-06-13 18:15:11 +00:00
kvt_desc.nim Triggered write event for kvt (#2351) 2024-06-13 18:15:11 +00:00
kvt_init.nim Core db use differential tx layers for aristo and kvt (#1949) 2023-12-19 12:39:23 +00:00
kvt_layers.nim Cache code and invalid jump destination tables (fixes #2268) (#2404) 2024-06-21 09:44:10 +02:00
kvt_persistent.nim Aristo update rocksdb backend drivers (#2135) 2024-04-16 20:39:11 +00:00
kvt_tx.nim Triggered write event for kvt (#2351) 2024-06-13 18:15:11 +00:00
kvt_utils.nim Cache code and invalid jump destination tables (fixes #2268) (#2404) 2024-06-21 09:44:10 +02:00
kvt_walk.nim Core db use differential tx layers for aristo and kvt (#1949) 2023-12-19 12:39:23 +00:00