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author | Graham Christensen <graham@grahamc.com> | 2019-04-12T16·31-0400 |
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committer | Graham Christensen <graham@grahamc.com> | 2019-08-14T20·09-0400 |
commit | ee9c988a1b2e3c511b8613e698a0f9632ab1538f (patch) | |
tree | ee8d8dcbe6215e57113d481767a270ddfaeaf20a /src/libexpr/nix-expr.pc.in | |
parent | 1eeaf99cf89630f84b4a1b6882a0f98019725d9e (diff) |
Track function start and ends for flame graphs
With this patch, and this file I called `log.py`: #!/usr/bin/env nix-shell #!nix-shell -i python3 -p python3 --pure import sys from pprint import pprint stack = [] timestack = [] for line in open(sys.argv[1]): components = line.strip().split(" ", 2) if components[0] != "function-trace": continue direction = components[1] components = components[2].rsplit(" ", 2) loc = components[0] _at = components[1] time = int(components[2]) if direction == "entered": stack.append(loc) timestack.append(time) elif direction == "exited": dur = time - timestack.pop() vst = ";".join(stack) print(f"{vst} {dur}") stack.pop() and: nix-instantiate --trace-function-calls -vvvv ../nixpkgs/pkgs/top-level/release.nix -A unstable > log.matthewbauer 2>&1 ./log.py ./log.matthewbauer > log.matthewbauer.folded flamegraph.pl --title matthewbauer-post-pr log.matthewbauer.folded > log.matthewbauer.folded.svg I can make flame graphs like: http://gsc.io/log.matthewbauer.folded.svg --- Includes test cases around function call failures and tryEval. Uses RAII so the finish is always called at the end of the function.
Diffstat (limited to 'src/libexpr/nix-expr.pc.in')
0 files changed, 0 insertions, 0 deletions