High-residency modules during GHC build

While trying to figure out memory allocation failures on the CI server, I tracked allocations and residency on a per-module basis, and noticed that some modules require a lot more memory to compile than others.

I've compiled a digest of the most memory-hungry compilation steps:

"/usr/local/bin/ghc" ... compiler/stage1/build/OptCoercion.o: Max. residency: 991356584 / In use: 2094M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/OptCoercion.dyn_o: Max. residency: 714940528 / In use: 1471M
"/usr/local/bin/ghc" ... compiler/stage1/build/X86/CodeGen.o: Max. residency: 679947656 / In use: 1497M
"inplace/bin/ghc-stage1" ... libraries/Cabal/Cabal/dist-install/build/Distribution/SPDX/LicenseId.dyn_o: Max. residency: 653177496 / In use: 1355M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/X86/CodeGen.dyn_o: Max. residency: 641515344 / In use: 1425M
"/usr/local/bin/ghc" ... -ilibraries/parsec: Max. residency: 593335568 / In use: 1355M
"/usr/local/bin/ghc" ... libraries/Cabal/Cabal/dist-boot/build/Distribution/SPDX/LicenseId.o: Max. residency: 575034968 / In use: 1137M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/DynFlags.dyn_o: Max. residency: 402734408 / In use: 1059M
"/usr/local/bin/ghc" ... compiler/stage1/build/DynFlags.o: Max. residency: 343154784 / In use: 892M
"inplace/bin/ghc-stage1" ... libraries/template-haskell/dist-install/build/Language/Haskell/TH/Syntax.dyn_o: Max. residency: 266744312 / In use: 720M
"/usr/local/bin/ghc" ... compiler/stage1/build/Parser.o: Max. residency: 258613584 / In use: 679M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/CmmOpt.dyn_o: Max. residency: 254639624 / In use: 568M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/Parser.dyn_o: Max. residency: 236774592 / In use: 635M
"inplace/bin/ghc-stage1" ... ghc/stage2/build/GHCi/UI.dyn_o: Max. residency: 234055792 / In use: 609M
"/usr/local/bin/ghc" ... compiler/stage1/build/HsExpr.o: Max. residency: 233724400 / In use: 657M
"/usr/local/bin/ghc" ... compiler/stage1/build/CmmOpt.o: Max. residency: 208378888 / In use: 436M
"/usr/local/bin/ghc" ... compiler/stage1/build/HscMain.o: Max. residency: 197177248 / In use: 500M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/HsExpr.dyn_o: Max. residency: 192780496 / In use: 521M
"inplace/bin/ghc-stage1" ... libraries/Cabal/Cabal/dist-install/build/Distribution/Simple/Setup.dyn_o: Max. residency: 191649952 / In use: 521M
"/usr/local/bin/ghc" ... compiler/stage1/build/HsDecls.o: Max. residency: 183441120 / In use: 508M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/TcSplice.dyn_o: Max. residency: 176802000 / In use: 445M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/TcRnDriver.dyn_o: Max. residency: 172892128 / In use: 458M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/HscMain.dyn_o: Max. residency: 172802688 / In use: 470M
"inplace/bin/ghc-stage1" ... libraries/ghci/dist-install/build/GHCi/TH/Binary.dyn_o: Max. residency: 169775368 / In use: 455M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/GhcMake.dyn_o: Max. residency: 167305408 / In use: 431M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/PrimOp.dyn_o: Max. residency: 162532408 / In use: 455M
"/usr/local/bin/ghc" ... compiler/stage1/build/HscTypes.o: Max. residency: 160814736 / In use: 421M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/HsDecls.dyn_o: Max. residency: 160445552 / In use: 426M
"inplace/bin/ghc-stage1" ... libraries/Cabal/Cabal/dist-install/build/Language/Haskell/Extension.dyn_o: Max. residency: 159817712 / In use: 363M
"/usr/local/bin/ghc" ... compiler/stage1/build/TcSplice.o: Max. residency: 156738656 / In use: 375M
"/usr/local/bin/ghc" ... compiler/stage1/build/TcRnDriver.o: Max. residency: 153910768 / In use: 421M
"inplace/bin/ghc-stage1" ... libraries/containers/dist-install/build/Data/Sequence/Internal.dyn_o: Max. residency: 151318224 / In use: 405M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/MatchLit.dyn_o: Max. residency: 150681176 / In use: 382M
"/usr/local/bin/ghc" ... compiler/stage1/build/ByteCodeGen.o: Max. residency: 144579176 / In use: 389M
"/usr/local/bin/ghc" ... compiler/stage1/build/GhcMake.o: Max. residency: 144411312 / In use: 379M
"/usr/local/bin/ghc" ... compiler/stage1/build/MatchLit.o: Max. residency: 142596736 / In use: 382M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/StgCmmPrim.dyn_o: Max. residency: 141484616 / In use: 340M
"inplace/bin/ghc-stage1" ... libraries/ghci/dist-install/build/GHCi/Message.dyn_o: Max. residency: 139224136 / In use: 363M
"/usr/local/bin/ghc" ... compiler/stage1/build/StgCmmPrim.o: Max. residency: 137390744 / In use: 346M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/TcExpr.dyn_o: Max. residency: 136387128 / In use: 370M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/Lexer.dyn_o: Max. residency: 135228120 / In use: 337M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/TcTyClsDecls.dyn_o: Max. residency: 134817024 / In use: 369M
"/usr/local/bin/ghc" ... compiler/stage1/build/MkIface.o: Max. residency: 134039144 / In use: 339M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/RnExpr.dyn_o: Max. residency: 133947600 / In use: 345M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/HscTypes.dyn_o: Max. residency: 133938840 / In use: 366M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/TcGenDeriv.dyn_o: Max. residency: 133744056 / In use: 320M
"/usr/local/bin/ghc" ... compiler/stage1/build/TcExpr.o: Max. residency: 131766896 / In use: 336M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/GHC.dyn_o: Max. residency: 130998912 / In use: 277M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/ByteCodeGen.dyn_o: Max. residency: 129499464 / In use: 348M
"inplace/bin/ghc-stage1" ... compiler/stage2/build/InteractiveEval.dyn_o: Max. residency: 128902944 / In use: 286M

Trac metadata

Trac field	Value
Version	8.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture