Introduce jemalloc-allocator feature flag (#6675)

* Introduce jemalloc-stats feature flag

* remove unneeded space

* Update node/overseer/src/lib.rs

Co-authored-by: Marcin S. <marcin@bytedude.com>

* Update Cargo.toml

Co-authored-by: Marcin S. <marcin@bytedude.com>

* revert making tikv-jemallocator depend on jemalloc-stats

* conditionally import memory_stats instead of using dead_code

* fix test via expllicit import

* Add jemalloc-stats feature to crates, propagate it from root

* Apply `jemalloc-stats` feature to prepare mem stats; small refactor

* effect changes recommended on PR

* Update node/overseer/src/metrics.rs

Co-authored-by: Marcin S. <marcin@bytedude.com>

* fix compile error on in pipeline for linux. missing import

* Update node/overseer/src/lib.rs

Co-authored-by: Bastian Köcher <git@kchr.de>

* revert to defining collect_memory_stats inline

---------

Co-authored-by: Marcin S. <marcin@bytedude.com>
Co-authored-by: Marcin S <marcin@realemail.net>
Co-authored-by: Bastian Köcher <git@kchr.de>

Cargo.toml

@@ -19,10 +19,14 @@ repository = "https://github.com/paritytech/polkadot.git"
 version = "0.9.37"
 
 [dependencies]
-polkadot-cli = { path = "cli", features = [ "kusama-native", "westend-native", "rococo-native", "hostperfcheck" ] }
 color-eyre = { version = "0.6.1", default-features = false }
 tikv-jemallocator = "0.5.0"
 
+# Crates in our workspace, defined as dependencies so we can pass them feature flags.
+polkadot-cli = { path = "cli", features = [ "kusama-native", "westend-native", "rococo-native" ]  }
+polkadot-node-core-pvf = { path = "node/core/pvf" }
+polkadot-overseer = { path = "node/overseer" }
+
 [dev-dependencies]
 assert_cmd = "2.0.4"
 nix = { version = "0.26.1", features = ["signal"] }
@@ -202,6 +206,7 @@ try-runtime = [ "polkadot-cli/try-runtime" ]
 fast-runtime = [ "polkadot-cli/fast-runtime" ]
 runtime-metrics = [ "polkadot-cli/runtime-metrics" ]
 pyroscope = ["polkadot-cli/pyroscope"]
+jemalloc-allocator = ["polkadot-node-core-pvf/jemalloc-allocator", "polkadot-overseer/jemalloc-allocator"]
 
 # Configuration for building a .deb package - for use with `cargo-deb`
 [package.metadata.deb]

node/core/pvf/Cargo.toml

@@ -20,7 +20,7 @@ rand = "0.8.5"
 rayon = "1.5.1"
 slotmap = "1.0"
 tempfile = "3.3.0"
-tikv-jemalloc-ctl = "0.5.0"
+tikv-jemalloc-ctl = { version = "0.5.0", optional = true }
 tokio = { version = "1.24.2", features = ["fs", "process"] }
 
 parity-scale-codec = { version = "3.3.0", default-features = false, features = ["derive"] }
@@ -41,9 +41,13 @@ sp-tracing = { git = "https://github.com/paritytech/substrate", branch = "master
 
 [target.'cfg(target_os = "linux")'.dependencies]
 libc = "0.2.139"
+tikv-jemalloc-ctl = "0.5.0"
 
 [dev-dependencies]
 adder = { package = "test-parachain-adder", path = "../../../parachain/test-parachains/adder" }
 halt = { package = "test-parachain-halt", path = "../../../parachain/test-parachains/halt" }
 hex-literal = "0.3.4"
 tempfile = "3.3.0"
+
+[features]
+jemalloc-allocator = ["dep:tikv-jemalloc-ctl"]