#11800: T9872d bytes allocated has regressed terribly on 32-bit Linux -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Test Suite | Version: 7.10.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | performance bug Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- While updating the performance testsuite numbers for 8.0.1-rc3 I noticed that `T9872d`'d bytes allocated metric has somehow regressed 350% but only on 32-bit Debian 8, {{{ =====> T9872d(normal) 22 of 30 [0, 0, 0] cd ./perf/compiler && "/home/ben/ghc/inplace/test spaces/ghc-stage2" -c T9872d.hs -fforce-recomp -dno-debug-output -fshow-warning-groups -no-user- package-db -rtsopts -fno-warn-tabs -fno-warn-missed-specialisations -fno- ghci-history +RTS -V0 -tT9872d.comp.stats --machine-readable -RTS > T9872d.comp.stderr 2>&1 bytes allocated value is too high: Expected T9872d(normal) bytes allocated: 59651432 +/-5% Lower bound T9872d(normal) bytes allocated: 56668860 Upper bound T9872d(normal) bytes allocated: 62634004 Actual T9872d(normal) bytes allocated: 264566040 Deviation T9872d(normal) bytes allocated: 343.5 % *** unexpected stat test failure for T9872d(normal) }}} The test passes on 64-bit Debian 8 and no similar jumps are seen in the test's history. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11800 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler