feat: run benchmark with systemd (for optional cpu isolation)

Author: not-matthias

Cargo.toml

@@ -52,7 +52,7 @@ object = "0.36.7"
 linux-perf-data = "0.11.0"
 debugid = "0.8.0"
 memmap2 = "0.9.5"
-nix = { version = "0.29.0", features = ["fs"] }
+nix = { version = "0.29.0", features = ["fs", "user"] }
 futures = "0.3.31"
 
 [target.'cfg(target_os = "linux")'.dependencies]

src/run/runner/wall_time/perf/mod.rs

@@ -96,13 +96,16 @@ impl PerfRunner {
         };
         debug!("Using call graph mode: {}", cg_mode);
 
+        let user = nix::unistd::User::from_uid(nix::unistd::Uid::current())?.unwrap();
         cmd.args([
             "-c",
             &format!(
-                "perf record --user-callchains --freq=999 --switch-output --control=fifo:{},{} --delay=-1 -g --call-graph={cg_mode} --output={} -- {bench_cmd}",
+                "perf record --user-callchains --freq=999 --switch-output --control=fifo:{},{} --delay=-1 -g --call-graph={cg_mode} --output={} -- \
+                sudo systemd-run --scope --slice=codspeed.slice --same-dir -- runuser -u {} -- {bench_cmd}",
                 perf_fifo.ctl_fifo_path.to_string_lossy(),
                 perf_fifo.ack_fifo_path.to_string_lossy(),
-                perf_file.path().to_string_lossy()
+                perf_file.path().to_string_lossy(),
+                user.name
             ),
         ]);
         debug!("cmd: {:?}", cmd);