mirror of
https://github.com/privatevoid-net/nix-super.git
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a583a2bc59
On a system with multiple CPUs, running Nix operations through the daemon is significantly slower than "direct" mode: $ NIX_REMOTE= nix-instantiate '<nixos>' -A system real 0m0.974s user 0m0.875s sys 0m0.088s $ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system real 0m2.118s user 0m1.463s sys 0m0.218s The main reason seems to be that the client and the worker get moved to a different CPU after every call to the worker. This patch adds a hack to lock them to the same CPU. With this, the overhead of going through the daemon is very small: $ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system real 0m1.074s user 0m0.809s sys 0m0.098s
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#pragma once
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namespace nix {
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#define WORKER_MAGIC_1 0x6e697863
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#define WORKER_MAGIC_2 0x6478696f
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#define PROTOCOL_VERSION 0x10e
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#define GET_PROTOCOL_MAJOR(x) ((x) & 0xff00)
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#define GET_PROTOCOL_MINOR(x) ((x) & 0x00ff)
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typedef enum {
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wopQuit = 0,
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wopIsValidPath = 1,
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wopHasSubstitutes = 3,
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wopQueryPathHash = 4,
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wopQueryReferences = 5,
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wopQueryReferrers = 6,
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wopAddToStore = 7,
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wopAddTextToStore = 8,
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wopBuildPaths = 9,
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wopEnsurePath = 10,
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wopAddTempRoot = 11,
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wopAddIndirectRoot = 12,
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wopSyncWithGC = 13,
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wopFindRoots = 14,
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wopExportPath = 16,
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wopQueryDeriver = 18,
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wopSetOptions = 19,
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wopCollectGarbage = 20,
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wopQuerySubstitutablePathInfo = 21,
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wopQueryDerivationOutputs = 22,
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wopQueryAllValidPaths = 23,
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wopQueryFailedPaths = 24,
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wopClearFailedPaths = 25,
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wopQueryPathInfo = 26,
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wopImportPaths = 27,
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wopQueryDerivationOutputNames = 28,
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wopQueryPathFromHashPart = 29,
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wopQuerySubstitutablePathInfos = 30,
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wopQueryValidPaths = 31,
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wopQuerySubstitutablePaths = 32,
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wopQueryValidDerivers = 33,
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} WorkerOp;
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#define STDERR_NEXT 0x6f6c6d67
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#define STDERR_READ 0x64617461 // data needed from source
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#define STDERR_WRITE 0x64617416 // data for sink
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#define STDERR_LAST 0x616c7473
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#define STDERR_ERROR 0x63787470
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Path readStorePath(Source & from);
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template<class T> T readStorePaths(Source & from);
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}
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