lighthouse/Cargo.toml
Paul Hauner 456b313665 Tune GNU malloc (#2299)
## Issue Addressed

NA

## Proposed Changes

Modify the configuration of [GNU malloc](https://www.gnu.org/software/libc/manual/html_node/The-GNU-Allocator.html) to reduce memory footprint.

- Set `M_ARENA_MAX` to 4.
    - This reduces memory fragmentation at the cost of contention between threads.
- Set `M_MMAP_THRESHOLD` to 2mb
    - This means that any allocation >= 2mb is allocated via an anonymous mmap, instead of on the heap/arena. This reduces memory fragmentation since we don't need to keep growing the heap to find big contiguous slabs of free memory.
- ~~Run `malloc_trim` every 60 seconds.~~
    - ~~This shaves unused memory from the top of the heap, preventing the heap from constantly growing.~~
    - Removed, see: https://github.com/sigp/lighthouse/pull/2299#issuecomment-825322646

*Note: this only provides memory savings on the Linux (glibc) platform.*
    
## Additional Info

I'm going to close #2288 in favor of this for the following reasons:

- I've managed to get the memory footprint *smaller* here than with jemalloc.
- This PR seems to be less of a dramatic change than bringing in the jemalloc dep.
- The changes in this PR are strictly runtime changes, so we can create CLI flags which disable them completely. Since this change is wide-reaching and complex, it's nice to have an easy "escape hatch" if there are undesired consequences.

## TODO

- [x] Allow configuration via CLI flags
- [x] Test on Mac
- [x] Test on RasPi.
- [x] Determine if GNU malloc is present?
    - I'm not quite sure how to detect for glibc.. This issue suggests we can't really: https://github.com/rust-lang/rust/issues/33244
- [x] Make a clear argument regarding the affect of this on CPU utilization.
- [x] Test with higher `M_ARENA_MAX` values.
- [x] Test with longer trim intervals
- [x] Add some stats about memory savings
- [x] Remove `malloc_trim` calls & code
2021-05-28 05:59:45 +00:00

97 lines
2.3 KiB
TOML

[workspace]
members = [
"account_manager",
"beacon_node",
"beacon_node/beacon_chain",
"beacon_node/client",
"beacon_node/eth1",
"beacon_node/eth2_libp2p",
"beacon_node/http_api",
"beacon_node/http_metrics",
"beacon_node/network",
"beacon_node/store",
"beacon_node/timer",
"boot_node",
"common/account_utils",
"common/clap_utils",
"common/compare_fields",
"common/compare_fields_derive",
"common/deposit_contract",
"common/directory",
"common/eth2",
"common/eth2_config",
"common/eth2_interop_keypairs",
"common/eth2_network_config",
"common/eth2_wallet_manager",
"common/hashset_delay",
"common/lighthouse_metrics",
"common/lighthouse_version",
"common/lockfile",
"common/logging",
"common/lru_cache",
"common/malloc_utils",
"common/remote_signer_consumer",
"common/sensitive_url",
"common/slot_clock",
"common/task_executor",
"common/test_random_derive",
"common/validator_dir",
"common/warp_utils",
"common/fallback",
"common/monitoring_api",
"consensus/cached_tree_hash",
"consensus/int_to_bytes",
"consensus/fork_choice",
"consensus/proto_array",
"consensus/safe_arith",
"consensus/ssz",
"consensus/ssz_derive",
"consensus/ssz_types",
"consensus/serde_utils",
"consensus/state_processing",
"consensus/swap_or_not_shuffle",
"consensus/tree_hash",
"consensus/tree_hash_derive",
"crypto/bls",
"crypto/eth2_hashing",
"crypto/eth2_key_derivation",
"crypto/eth2_keystore",
"crypto/eth2_wallet",
"lcli",
"lighthouse",
"lighthouse/environment",
"remote_signer",
"remote_signer/backend",
"remote_signer/client",
"slasher",
"slasher/service",
"testing/ef_tests",
"testing/eth1_test_rig",
"testing/node_test_rig",
"testing/remote_signer_test",
"testing/simulator",
"testing/state_transition_vectors",
"validator_client",
"validator_client/slashing_protection",
]
[patch]
[patch.crates-io]
tree_hash = { path = "consensus/tree_hash" }
tree_hash_derive = { path = "consensus/tree_hash_derive" }
eth2_ssz = { path = "consensus/ssz" }
eth2_ssz_derive = { path = "consensus/ssz_derive" }
eth2_ssz_types = { path = "consensus/ssz_types" }
eth2_hashing = { path = "crypto/eth2_hashing" }