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[General] Add option to set nix thread count

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Build log2(cores) derivations at once at most
This commit is contained in:
Antoine Viallon 2022-04-07 01:35:18 +02:00
parent 77c6ea9594
commit 8457628ee6
Signed by: aviallon
GPG key ID: 186FC35EDEB25716
1 changed files with 12 additions and 0 deletions
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12
general.nix
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@ -20,6 +20,9 @@ let
settings) settings)
); );
log2 = let
mylog = x: y: if (x >= 2) then mylog (x / 2) (y + 1) else y;
in x: mylog x 0;
buildUserKeyFile = "remote_builder/id_builder"; buildUserKeyFile = "remote_builder/id_builder";
buildUserPubKey = readFile ./nix/id_builder.pub; buildUserPubKey = readFile ./nix/id_builder.pub;
buildUserKey = readFile ./nix/id_builder; buildUserKey = readFile ./nix/id_builder;
@ -53,6 +56,13 @@ in
description = "Enable aviallon's general tuning"; description = "Enable aviallon's general tuning";
type = types.bool; type = types.bool;
}; };
cores = mkOption {
default = null;
example = 4;
description = "Number of physical threads of the machine";
type = types.nullOr (types.addCheck types.int (x: x > 0));
};
cpuArch = mkOption { cpuArch = mkOption {
default = "x86-64"; default = "x86-64";
example = "x86-64-v2"; example = "x86-64-v2";
@ -162,9 +172,11 @@ in
(optionals cfg.flakes.enable ["nix-command" "flakes"]) (optionals cfg.flakes.enable ["nix-command" "flakes"])
]; ];
download-attempts = 5; download-attempts = 5;
cores = ifEnable (cfg.cores != null) cfg.cores;
stalled-download-timeout = 20; stalled-download-timeout = 20;
}; };
nix.maxJobs = mkIf (cfg.cores != null) (log2 cfg.cores);
}; };
} }