Sanity check: was the stage0 compiler built using "perf" settings? Janek Dnia poniedziałek, 30 maja 2016, Gabor Greif napisał:

Hi devs,

I get some pretty bad allocation statistics when testing GHC HEAD. Not sure why, but this is with a stage-0 compiler that is also GHC HEAD. (I doubt that that is the reason, though.)

I see on a linux x64 system (RHEL6) :

Unexpected stat failures: /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T10370 T10370 [stat not good enough] (optasm) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T10547 T10547 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T1969 T1969 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T3064 T3064 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T3294 T3294 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T4801 T4801 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T5030 T5030 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T5321FD T5321FD [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T5321Fun T5321Fun [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T5631 T5631 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T5642 T5642 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T5837 T5837 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T6048 T6048 [stat not good enough] (optasm) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T783 T783 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9020 T9020 [stat not good enough] (optasm) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9233 T9233 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9675 T9675 [stat not good enough] (optasm) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9872a T9872a [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9872b T9872b [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9872c T9872c [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9872d T9872d [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9961 T9961 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/parsing001 parsing001 [stat not good enough] (normal) /tmp/ghctest/ayiNBP/1/2/3/./perf/space_leaks/T4029 T4029 [stat not good enough] (ghci)

Some of the tests look like this:

cd /tmp/ghctest/ayiNBP/1/2/3/./perf/compiler/T9872a && "ghc-head-x86_64/inplace/test spaces/ghc-stage2" -c T9872a.hs -fforce-recomp -dno-debug-output -no-user-package-db -rtsopts -fno-warn-tabs -fno-warn-missed-specialisations -fshow-warning-groups -fno-ghci-history +RTS -V0 -tT9872a.comp.stats --machine-readable -RTS > T9872a.comp.stderr 2>&1 bytes allocated value is too high: Expected T9872a(normal) bytes allocated: 3352882080 +/-5% Lower bound T9872a(normal) bytes allocated: 3185237976 Upper bound T9872a(normal) bytes allocated: 3520526184 Actual T9872a(normal) bytes allocated: 13260131240 Deviation T9872a(normal) bytes allocated: 295.5 % *** unexpected stat test failure for T9872a(normal)

Around 300% looks really bad. Can anybody reproduce this? For reference, this is the test command I run:

$ make test TEST="T9961 T10547 T10370 T3064 T4029 T5642 parsing001 T783 T3294 T9872d T9872b T9872c T9872a T1969 T5321Fun T5837 T5631 T5321FD T5030 T4801 T6048 T9675 T9233 T9020"

The testsuite works nicely otherwise.

Cheers and thanks,

Gabor _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

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