Hi! Roel Janssen <r...@gnu.org> skribis:
> I applied the patch, and here are the results: > > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure -- true > The following derivations will be built: > /gnu/store/0hz8g844432b5h9zbqr9cpsjy0brg15h-profile.drv > /gnu/store/wkksb7bbx3jr0p6p5cj4kkphbwday0yd-info-dir.drv > /gnu/store/cd2mwx9qprdy23p7j3pik2zs14nifn36-manual-database.drv > Creating manual page database for 1 packages... done in 1.816 s > > real 1m14.686s > user 0m5.761s > sys 0m0.498s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure -- true > > real 0m34.100s > user 0m5.599s > sys 0m0.414s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure -- true > > real 0m33.821s > user 0m5.140s > sys 0m0.432s You’re telling me it’s just as bad as before, right? > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-substitutes --no-grafts -- true > The following derivations will be built: > /gnu/store/rvh0imjdimwm90nzr0fmr5gmp97lyiix-profile.drv > /gnu/store/5hm3v4afjf9gix92ixqzv9bwc11a608s-fonts-dir.drv > > real 0m37.200s > user 0m3.408s > sys 0m0.284s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-substitutes --no-grafts -- true > > real 0m19.415s > user 0m3.466s > sys 0m0.306s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-substitutes --no-grafts -- true > > real 0m18.850s > user 0m3.536s > sys 0m0.346s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-grafts -- true > > real 0m16.003s > user 0m3.246s > sys 0m0.301s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-grafts -- true > > real 0m18.205s > user 0m3.470s > sys 0m0.314s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-substitutes -- true > > real 0m33.731s > user 0m5.111s > sys 0m0.428s > [roel@hpcguix guix]$ time guixr environment --ad-hoc coreutils --pure > --no-substitutes -- true > > real 0m30.993s > user 0m5.049s > sys 0m0.458s > > Why is grafting so slow, even if it doesn't have to graft anything? Grafting leads to a bunch of additional RPCs: --8<---------------cut here---------------start------------->8--- $ GUIX_PROFILING=rpc ./pre-inst-env guix build coreutils /gnu/store/mskh7zisxa313anqv68c5lr4hajldjc5-coreutils-8.27-debug /gnu/store/xbvwxf4k5njnb3hn93xwqlppjkiz4hdv-coreutils-8.27 Remote procedure call summary: 379 RPCs build-things ... 1 built-in-builders ... 1 valid-path? ... 5 query-substitutable-path-infos ... 8 query-references ... 22 query-valid-derivers ... 48 add-text-to-store ... 294 $ GUIX_PROFILING=rpc ./pre-inst-env guix build coreutils --no-grafts /gnu/store/mskh7zisxa313anqv68c5lr4hajldjc5-coreutils-8.27-debug /gnu/store/xbvwxf4k5njnb3hn93xwqlppjkiz4hdv-coreutils-8.27 Remote procedure call summary: 294 RPCs built-in-builders ... 1 query-substitutable-path-infos ... 1 build-things ... 1 valid-path? ... 5 add-text-to-store ... 286 --8<---------------cut here---------------end--------------->8--- So the problem is probably not NFS in this case but rather RPC performance. However, I can’t help with this until you drop ‘guixr’ and use GUIX_DAEMON_SOCKET=guix:// instead. Hint hint. ;-) Thanks for your feedback, Ludo’.
