Use jemalloc allocator

Signed-off-by: Vladislav Volodkin <vladvolodkin@gmail.com>

mountpoint-s3/Cargo.toml

@@ -45,6 +45,8 @@ tracing-log = "0.2.0"
 tracing-subscriber = { version = "0.3.14", features = ["env-filter"] }
 async-stream = "0.3.5"
 humansize = "2.1.3"
+tikv-jemalloc-ctl = { version = "0.6.0", features = ["profiling", "stats"] }
+tikv-jemallocator = "0.6.0"
 
 [target.'cfg(target_os = "linux")'.dependencies]
 procfs = { version = "0.16.0", default-features = false }

mountpoint-s3/src/main.rs

@@ -1,3 +1,6 @@
+#[global_allocator]
+static ALLOC: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
+
 fn main() -> anyhow::Result<()> {
     mountpoint_s3::cli::main(mountpoint_s3::cli::create_s3_client)
 }

mountpoint-s3/src/metrics.rs

@@ -9,6 +9,7 @@ use std::time::Duration;
 use dashmap::DashMap;
 use metrics::{Key, Metadata, Recorder};
 use sysinfo::{get_current_pid, MemoryRefreshKind, ProcessRefreshKind, System};
+use tikv_jemalloc_ctl::{epoch, stats};
 
 use crate::sync::mpsc::{channel, RecvTimeoutError, Sender};
 use crate::sync::Arc;
@@ -80,6 +81,18 @@ fn poll_process_metrics(sys: &mut System) {
                 metrics::gauge!("system.available_memory").set(sys.available_memory() as f64);
             }
         }
+        epoch::advance().unwrap();
+
+        let allocated = stats::allocated::read().unwrap();
+        let active = stats::active::read().unwrap();
+        let mapped = stats::mapped::read().unwrap();
+        let retained = stats::retained::read().unwrap();
+        let resident = stats::resident::read().unwrap();
+        metrics::gauge!("process.jemalloc.allocated").set(allocated as f64);
+        metrics::gauge!("process.jemalloc.active").set(active as f64);
+        metrics::gauge!("process.jemalloc.mapped").set(mapped as f64);
+        metrics::gauge!("process.jemalloc.retained").set(retained as f64);
+        metrics::gauge!("process.jemalloc.resident").set(resident as f64);
     }
 }