Only depend on perf-event-open on Linux

Author: Kobzol

collector/benchlib/Cargo.toml

@@ -15,5 +15,5 @@ env_logger = "0.9.0"
 clap = { version = "3.2", features = ["derive"] }
 libc = "0.2"
 
-[target.'cfg(unix)'.dependencies]
+[target.'cfg(target_os = "linux")'.dependencies]
 perf-event = "0.4.7"

collector/benchlib/src/measure/perf_counter/unix.rs renamed to collector/benchlib/src/measure/perf_counter/linux.rs

@@ -1,11 +1,11 @@
-#[cfg(unix)]
-mod unix;
+#[cfg(target_os = "linux")]
+mod linux;
 
-#[cfg(windows)]
-mod windows;
+#[cfg(not(target_os = "linux"))]
+mod non_linux;
 
-#[cfg(unix)]
-pub use unix::benchmark_function;
+#[cfg(target_os = "linux")]
+pub use linux::benchmark_function;
 
-#[cfg(windows)]
-pub use windows::benchmark_function;
+#[cfg(not(target_os = "linux"))]
+pub use non_linux::benchmark_function;

collector/benchlib/src/measure/perf_counter/mod.rs

@@ -1,5 +1,5 @@
 use crate::comm::messages::BenchmarkStats;
 
 pub fn benchmark_function<F: FnOnce() -> R, R>(_func: F) -> anyhow::Result<BenchmarkStats> {
-    panic!("Runtime benchmarking is not supported on Windows");
+    panic!("Runtime benchmarking is only supported on Linux");
 }