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base repository: NixOS/nix
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head repository: NixOS/nix
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  • 3 commits
  • 4 files changed
  • 1 contributor

Commits on Mar 28, 2019

  1. docs: document balancing cores and max-jobs

    @grahamc
    grahamc committed Mar 28, 2019
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Commits on Apr 11, 2019

  1. nix: trivial instantiation timing 

    Some trivial experiment with timing.

after `make install`:

    ./inst/bin/nix-instantiate '<nixpkgs/pkgs/top-level/release.nix>' \
        -A unstable -vvvvvv 2>&1 > log

    cat log | grep ':clock:' | sort \
        | awk '
            { sums[$2] += $3; calls[$2] += 1; }
            END {
                for (category in sums) {
                    print category, sums[category], calls[category],
                          sums[category] / calls[category];
                }
            }'

showed me:

| function-position                                                                                                               | ns      | calls |
|---------------------------------------------------------------------------------------------------------------------------------|---------|-------|
| /nix/store/xnjvl3lnbl729hsi585v5075fqsgijl9-nixos-19.03.172138.5c52b25283a/nixos/pkgs/stdenv/generic/make-derivation.nix:108:33 | 437582  | 8981  |
| /nix/store/xnjvl3lnbl729hsi585v5075fqsgijl9-nixos-19.03.172138.5c52b25283a/nixos/pkgs/stdenv/generic/check-meta.nix:22:5        | 503557  | 14230 |
| /nix/store/xnjvl3lnbl729hsi585v5075fqsgijl9-nixos-19.03.172138.5c52b25283a/nixos/pkgs/stdenv/generic/check-meta.nix:214:9       | 2817229 | 5093  |

and:

| function-position                                                                                                               | ns      | calls | ns/call |
| /nix/store/xnjvl3lnbl729hsi585v5075fqsgijl9-nixos-19.03.172138.5c52b25283a/nixos/pkgs/development/compilers/ghc/8.6.4.nix:20:27 | 3309    | 3     | 1103    |
| /nix/var/nix/profiles/per-user/root/channels/nixos/pkgs/top-level/release-lib.nix:83:9                                          | 272303  | 195   | 1396.43 |
| /nix/var/nix/profiles/per-user/root/channels/nixos/lib/systems/parse.nix:174:12                                                 | 10180   | 6     | 1696.67 |
    @grahamc
    grahamc committed Apr 11, 2019
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Commits on Jul 18, 2019

  1. cores vs. jobs: fixup

    @grahamc
    grahamc committed Jul 18, 2019
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