Nix flake

README.md

@@ -22,7 +22,24 @@ OPTIONS:
 -h,  --help                  Display available options
 ```
 
-### Build
+### Nix Build
+
+With [`nix`](https://nixos.org/download/) installed you can run the binary directly from the github repo without cloning it
+or installing any other system dependencies manually.
+Build both packages using
+```sh
+nix build github:SoilRos/cpu-latency
+```
+And the binaries can be found in `results/bin`.
+
+Or run the apps directly:
+```sh
+nix run github:SoilRos/cpu-latency#default > cpu-latency.csv
+nix run github:SoilRos/cpu-latency#cpu-latency-plot -- -i cpu-latency.csv -o cpu-latency.png
+```
+Thats it. The package definition can be found in `flake.nix`
+
+### Manual Build
 
 This program requires the `hwloc` API in order to bind threads and memory. Make sure to have it available on your system, for example:
 

cpu-latency.csv

@@ -0,0 +1,16 @@
+,,,,,,,,,,,,,,,
+8.19047,,,,,,,,,,,,,,,
+38.7161,43.3911,,,,,,,,,,,,,,
+42.7849,41.2916,8.3785,,,,,,,,,,,,,
+40.6754,40.5147,37.9108,39.2531,,,,,,,,,,,,
+41.4751,34.3101,40.011,42.3767,10.2224,,,,,,,,,,,
+39.167,42.7887,39.6729,40.9829,36.5744,43.2831,,,,,,,,,,
+41.0165,40.2607,30.5628,39.7397,31.0674,35.1345,8.02883,,,,,,,,,
+41.3245,36.9565,38.4529,37.2639,37.4976,38.8147,38.1139,37.7121,,,,,,,,
+40.7089,33.8335,34.8358,35.9822,33.7611,33.0055,37.9209,38.3884,8.08093,,,,,,,
+34.9224,40.167,38.8864,37.7187,38.1265,37.6803,37.4194,39.1452,33.8773,39.4251,,,,,,
+38.1568,40.4715,39.2691,39.5195,38.0925,38.9488,32.5569,36.6864,39.3567,33.3397,8.19833,,,,,
+39.4106,41.1751,35.8036,32.4971,38.3238,39.4311,31.8397,40.3429,32.8858,33.4102,37.5421,31.9478,,,,
+39.5997,35.4925,42.9214,39.8932,33.9812,33.2923,36.7748,33.3397,36.9161,38.1162,38.2239,41.5213,7.5154,,,
+36.4321,36.5922,40.6733,40.1444,41.5501,32.7673,34.4882,40.2444,31.9862,41.305,38.3385,40.4523,38.9662,41.9738,,
+40.9362,35.827,40.7108,41.4788,37.766,33.6702,42.2824,38.1555,37.9444,33.301,40.524,33.7182,41.7284,42.1193,7.84817,

flake.nix

@@ -0,0 +1,51 @@
+{
+  description = "Measure the CPU latency between cores";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+  outputs = { self, nixpkgs }:
+    let
+      systems = [ "x86_64-linux" "aarch64-linux" ];
+      forAllSystems = f:
+        nixpkgs.lib.genAttrs systems (system: f nixpkgs.legacyPackages.${system});
+    in
+    {
+      packages = forAllSystems (pkgs: {
+        default = pkgs.stdenv.mkDerivation {
+          pname = "cpu-latency";
+          version = "0.1.0";
+          src = ./.;
+
+          nativeBuildInputs = [ pkgs.cmake pkgs.pkg-config ];
+          buildInputs = [ pkgs.hwloc ];
+
+          installPhase = ''
+            runHook preInstall
+            install -Dm755 cpu-latency $out/bin/cpu-latency
+            install -Dm755 ../cpu-latency-plot $out/bin/cpu-latency-plot
+            runHook postInstall
+          '';
+        };
+      });
+
+      apps = forAllSystems (pkgs:
+        let
+          system = pkgs.stdenv.hostPlatform.system;
+          pythonEnv = pkgs.python3.withPackages (ps: [ ps.matplotlib ps.numpy ]);
+          cpu-latency-plot = pkgs.writeShellScriptBin "cpu-latency-plot" ''
+            exec ${pythonEnv}/bin/python3 ${self.packages.${system}.default}/bin/cpu-latency-plot "$@"
+          '';
+        in
+        {
+          default = self.apps.${system}.cpu-latency;
+          cpu-latency = {
+            type = "app";
+            program = "${self.packages.${system}.default}/bin/cpu-latency";
+          };
+          cpu-latency-plot = {
+            type = "app";
+            program = "${cpu-latency-plot}/bin/cpu-latency-plot";
+          };
+        });
+    };
+}