tvl-depot/tools/perf-flamegraph.nix

# 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
''
feat(tools): Add script to flamegraph a command Add tools.perf-flamegraph, which collects the base case execution of perf piped through stackcollapse-perf and flamegraph to flamegraph the execution of an external command via perf. Change-Id: I671fe254dc374b6cd7deca2d3bdea266164de025 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1176 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI 2020-07-15 15:54:18 +02:00			`# 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`

fix(tools/perf-flamegraph): Get rid of most 'unknown's This makes two main changes: 1) It disables profiling of things that aren't part of the invoked process (-a). This isn't particularly useful in most cases because it will show things like Chrome's VP9 decoding while you're profiling something else. 2) It tells perf about the debug symbol format, which for some reason isn't DWARF2 by default. Change-Id: Ida6a54b74f1ec635fec930db7e2a2aa039dd1443 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1185 Reviewed-by: glittershark <grfn@gws.fyi> Tested-by: BuildkiteCI 2020-07-16 02:33:53 +02:00			`${pkgs.linuxPackages.perf}/bin/perf record -g --call-graph dwarf -F max "$@"`
feat(tools): Add script to flamegraph a command Add tools.perf-flamegraph, which collects the base case execution of perf piped through stackcollapse-perf and flamegraph to flamegraph the execution of an external command via perf. Change-Id: I671fe254dc374b6cd7deca2d3bdea266164de025 Reviewed-on: https://cl.tvl.fyi/c/depot/+/1176 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI 2020-07-15 15:54:18 +02:00			`${pkgs.linuxPackages.perf}/bin/perf script \`
			`\| ${pkgs.flamegraph}/bin/stackcollapse-perf.pl \`
			`\| ${pkgs.flamegraph}/bin/flamegraph.pl`
			`''`