3 commits

Author	SHA1	Message	Date
Eelco Dolstra	0629601da1	Move EvalState from the stack to the heap ... EvalState contains a few counters (e.g. nrValues) that increase quickly enough that they end up being interpreted as pointers by the garbage collector. Moving it to the heap makes them invisible to the garbage collector. This reduces the max RSS doing 100 evaluations of nixos.tests.firefox.x86_64-linux.drvPath from 455 MiB to 292 MiB. Note: ideally, allocations would be much further up in the 64-bit address space to reduce the odds of an integer being misinterpreted as a pointer. Maybe we can use some linker magic to move the .bss segment to a higher address.	2018-06-12 17:49:55 +02:00
Eelco Dolstra	1672bcd230	Move evaluator-specific settings out of libstore	2018-05-30 13:29:50 +02:00
Eelco Dolstra	6fa690291a	Add 'nix upgrade-nix' command ... This command upgrades Nix to the latest stable version by installing a store path obtained from https://github.com/NixOS/nixpkgs/raw/master/nixos/modules/installer/tools/nix-fallback-paths.nix which is the same store path that the installer at https://nixos.org/nix/install.sh uses. The upgrade fails if Nix is not installed in a profile (e.g. on NixOS, or when installed outside of the Nix store).	2018-01-31 16:24:43 +01:00