[GHC] #14974: 2-fold memory usage regression GHC 8.2.2 -> GHC 8.4.1 compiling `mmark` package
GHC
ghc-devs at haskell.org
Mon Mar 26 08:38:48 UTC 2018
#14974: 2-fold memory usage regression GHC 8.2.2 -> GHC 8.4.1 compiling `mmark`
package
-------------------------------------+-------------------------------------
Reporter: hvr | Owner: (none)
Type: bug | Status: new
Priority: high | Milestone:
Component: Compiler | Version: 8.4.1
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:
-------------------------------------+-------------------------------------
I haven't had time yet to diagnose where the memory is going to, but
here's how to reproduce:
{{{
cabal get mmark-0.0.5.6 && cd mmark-0.0.5.6/
cat > cabal.project <<EOF
packages: .
package mmark
ghc-options: -Rghc-timing
EOF
}}}
Then, `cabal new-build -w ghc-8.4.1` and ``cabal new-build -w ghc-8.2.2`
will respectively output
{{{
Resolving dependencies...
Build profile: -w ghc-8.4.1 -O1
In order, the following will be built (use -v for more details):
- mmark-0.0.5.6 (lib) (first run)
Configuring library for mmark-0.0.5.6..
<<ghc: 13510872 bytes, 13 GCs, 806197/1299656 avg/max bytes residency (3
samples), 4M in use, 0.001 INIT (0.000 elapsed), 0.007 MUT (0.025
elapsed), 0.018 GC (0.018 elapsed) :ghc>>
Preprocessing library for mmark-0.0.5.6..
Building library for mmark-0.0.5.6..
[1 of 9] Compiling Text.MMark.Parser.Internal.Type (
Text/MMark/Parser/Internal/Type.hs, /tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Parser/Internal/Type.o
)
[2 of 9] Compiling Text.MMark.Parser.Internal (
Text/MMark/Parser/Internal.hs, /tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Parser/Internal.o
)
[3 of 9] Compiling Text.MMark.Type ( Text/MMark/Type.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Type.o
)
Text/MMark/Type.hs:38:1: warning: [-Wunused-imports]
The import of ‘Data.Semigroup’ is redundant
except perhaps to import instances from ‘Data.Semigroup’
To import instances alone, use: import Data.Semigroup()
|
38 | import Data.Semigroup
| ^^^^^^^^^^^^^^^^^^^^^
[4 of 9] Compiling Text.MMark.Trans ( Text/MMark/Trans.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Trans.o
)
[5 of 9] Compiling Text.MMark.Util ( Text/MMark/Util.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Util.o
)
[6 of 9] Compiling Text.MMark.Render ( Text/MMark/Render.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Render.o
)
Text/MMark/Render.hs:25:1: warning: [-Wunused-imports]
The import of ‘Data.Semigroup’ is redundant
except perhaps to import instances from ‘Data.Semigroup’
To import instances alone, use: import Data.Semigroup()
|
25 | import Data.Semigroup
| ^^^^^^^^^^^^^^^^^^^^^
[7 of 9] Compiling Text.MMark.Parser ( Text/MMark/Parser.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Parser.o
)
[8 of 9] Compiling Text.MMark ( Text/MMark.hs, /tmp/mmark-0.0.5.6
/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark.o )
[9 of 9] Compiling Text.MMark.Extension ( Text/MMark/Extension.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Extension.o
)
<<ghc: 89663269464 bytes, 1856 GCs, 338140365/1430147624 avg/max bytes
residency (23 samples), 4130M in use, 0.000 INIT (0.000 elapsed), 58.546
MUT (62.124 elapsed), 31.536 GC (31.505 elapsed) :ghc>>
<<ghc: 65387008 bytes, 50 GCs, 2189716/5047200 avg/max bytes residency (5
samples), 11M in use, 0.000 INIT (0.000 elapsed), 0.021 MUT (0.207
elapsed), 0.042 GC (0.042 elapsed) :ghc>>
}}}
and
{{{
Resolving dependencies...
Build profile: -w ghc-8.4.1 -O1
In order, the following will be built (use -v for more details):
- mmark-0.0.5.6 (lib) (first run)
Configuring library for mmark-0.0.5.6..
<<ghc: 13510872 bytes, 13 GCs, 806197/1299656 avg/max bytes residency (3
samples), 4M in use, 0.001 INIT (0.000 elapsed), 0.007 MUT (0.025
elapsed), 0.018 GC (0.018 elapsed) :ghc>>
Preprocessing library for mmark-0.0.5.6..
Building library for mmark-0.0.5.6..
[1 of 9] Compiling Text.MMark.Parser.Internal.Type (
Text/MMark/Parser/Internal/Type.hs, /tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Parser/Internal/Type.o
)
[2 of 9] Compiling Text.MMark.Parser.Internal (
Text/MMark/Parser/Internal.hs, /tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Parser/Internal.o
)
[3 of 9] Compiling Text.MMark.Type ( Text/MMark/Type.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Type.o
)
[4 of 9] Compiling Text.MMark.Trans ( Text/MMark/Trans.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Trans.o
)
[5 of 9] Compiling Text.MMark.Util ( Text/MMark/Util.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Util.o
)
[6 of 9] Compiling Text.MMark.Render ( Text/MMark/Render.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Render.o
)
[7 of 9] Compiling Text.MMark.Parser ( Text/MMark/Parser.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Parser.o
)
[8 of 9] Compiling Text.MMark ( Text/MMark.hs, /tmp/mmark-0.0.5.6
/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark.o )
[9 of 9] Compiling Text.MMark.Extension ( Text/MMark/Extension.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.4.1/mmark-0.0.5.6/build/Text/MMark/Extension.o
)
<<ghc: 89663269464 bytes, 1856 GCs, 338140365/1430147624 avg/max bytes
residency (23 samples), 4130M in use, 0.000 INIT (0.000 elapsed), 58.546
MUT (62.124 elapsed), 31.536 GC (31.505 elapsed) :ghc>>
<<ghc: 65387008 bytes, 50 GCs, 2189716/5047200 avg/max bytes residency (5
samples), 11M in use, 0.000 INIT (0.000 elapsed), 0.021 MUT (0.207
elapsed), 0.042 GC (0.042 elapsed) :ghc>>
hvr at duo:/tmp/mmark-0.0.5.6$ cabal new-build -w ghc-8.2.2
Resolving dependencies...
Build profile: -w ghc-8.2.2 -O1
In order, the following will be built (use -v for more details):
- mmark-0.0.5.6 (lib) (first run)
Configuring library for mmark-0.0.5.6..
<<ghc: 11200976 bytes, 11 GCs, 853349/1518976 avg/max bytes residency (3
samples), 5M in use, 0.001 INIT (0.000 elapsed), 0.017 MUT (0.037
elapsed), 0.021 GC (0.021 elapsed) :ghc>>
Preprocessing library for mmark-0.0.5.6..
Building library for mmark-0.0.5.6..
[1 of 9] Compiling Text.MMark.Parser.Internal.Type (
Text/MMark/Parser/Internal/Type.hs, /tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Parser/Internal/Type.o
)
[2 of 9] Compiling Text.MMark.Parser.Internal (
Text/MMark/Parser/Internal.hs, /tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Parser/Internal.o
)
[3 of 9] Compiling Text.MMark.Type ( Text/MMark/Type.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Type.o
)
[4 of 9] Compiling Text.MMark.Trans ( Text/MMark/Trans.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Trans.o
)
[5 of 9] Compiling Text.MMark.Util ( Text/MMark/Util.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Util.o
)
[6 of 9] Compiling Text.MMark.Render ( Text/MMark/Render.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Render.o
)
[7 of 9] Compiling Text.MMark.Parser ( Text/MMark/Parser.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Parser.o
)
[8 of 9] Compiling Text.MMark ( Text/MMark.hs, /tmp/mmark-0.0.5.6
/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark.o )
[9 of 9] Compiling Text.MMark.Extension ( Text/MMark/Extension.hs,
/tmp/mmark-0.0.5.6/dist-
newstyle/build/x86_64-linux/ghc-8.2.2/mmark-0.0.5.6/build/Text/MMark/Extension.o
)
<<ghc: 89565902800 bytes, 2004 GCs, 225836231/772393000 avg/max bytes
residency (27 samples), 2179M in use, 0.001 INIT (0.000 elapsed), 58.237
MUT (61.472 elapsed), 25.823 GC (25.795 elapsed) :ghc>>
<<ghc: 79930048 bytes, 56 GCs, 3522920/10072040 avg/max bytes residency (6
samples), 20M in use, 0.001 INIT (0.000 elapsed), 0.028 MUT (0.213
elapsed), 0.059 GC (0.059 elapsed) :ghc>>
}}}
Consequently,
- GHC 8.2.2: **2179M in use**, 0.001 INIT (0.000 elapsed), 58.237 MUT
(61.472 elapsed), 25.823 GC (25.795 elapsed)
- GHC 8.4.1: **4130M in use**, 0.000 INIT (0.000 elapsed), 58.546 MUT
(62.124 elapsed), 31.536 GC (31.505 elapsed)
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14974>
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