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-rw-r--r--tools/perf-flamegraph.nix12
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf-flamegraph.nix b/tools/perf-flamegraph.nix
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+# Script that collects perf timing for the execution of a command and writes a
+# flamegraph to stdout
+{ pkgs, ... }:
+
+pkgs.writeShellScriptBin "perf-flamegraph" ''
+  set -euo pipefail
+
+  ${pkgs.linuxPackages.perf}/bin/perf record -g --call-graph dwarf -F max "$@"
+  ${pkgs.linuxPackages.perf}/bin/perf script \
+    | ${pkgs.flamegraph}/bin/stackcollapse-perf.pl \
+    | ${pkgs.flamegraph}/bin/flamegraph.pl
+''