That would help, but since this regression is quite recent I'm hoping
that someone will know what caused it. Did anyone notice when these
failures first appeared? It is certainly not the patches I'm working
on, because I see the same failures on two separate machines.
Cheers,
Simon
On 01/10/13 11:05, Simon Peyton-Jones wrote:
It would be very helpful if someone felt able to do some space profiles
of GHC itself, using 7.4, 7.6 and the new HEAD, to see whether residency
(the amount of head in use at any moment) has increased. And if so, why.
Any takers?
Simon
*From:*ghc-devs [mailto:[email protected]] *On Behalf Of
*Simon Marlow
*Sent:* 01 October 2013 10:01
*To:* [email protected]
*Subject:* New space leak?
My validate has a few perf failures (below). Now I know that sampling
heap size is inaccurate, but the evidence here is pretty strong. Also
validate fell over completely in my 2GB VM when Haddock ran out of
memory, I had to give it more memory to complete. Something has got
worse recently - this wasn't happening a couple of weeks ago.
Does anyone have any idea what might have caused this? Going back in
time is difficult. Are these failures happening for other people?
Let me suggest something that might help with these perf tests: running
the program with +RTS -h -i0.01 will give a more accurate indication of
peak residency, by running major GCs much more often. Also you get a
heap profile.
Cheers,
Simon
=====> haddock.base(normal) 2474 of 3806 [0, 1, 0]
max_bytes_used value is too high:
Expected max_bytes_used: 96022312 +/-10%
Lower bound max_bytes_used: 86420080
Upper bound max_bytes_used: 105624544
Actual max_bytes_used: 113537216
peak_megabytes_allocated value is too high:
Expected peak_megabytes_allocated: 274 +/-10%
Lower bound peak_megabytes_allocated: 246
Upper bound peak_megabytes_allocated: 302
Actual peak_megabytes_allocated: 323
*** unexpected failure for haddock.base(normal)
=====> haddock.Cabal(normal) 2475 of 3806 [0, 2, 0]
=====> haddock.compiler(normal) 2476 of 3806 [0, 2, 0]
peak_megabytes_allocated value is too high:
Expected peak_megabytes_allocated: 1250 +/-10%
Lower bound peak_megabytes_allocated: 1125
Upper bound peak_megabytes_allocated: 1375
Actual peak_megabytes_allocated: 1397
bytes allocated value is too high:
Expected bytes allocated: 25990254632 +/-10%
Lower bound bytes allocated: 23391229168
Upper bound bytes allocated: 28589280096
Actual bytes allocated: 28680445952
*** unexpected failure for haddock.compiler(normal)
=====> T3064(normal) 2480 of 3806 [0, 3, 0]
cd ./perf/compiler && '/home/smarlow/ghc/bindisttest/install
dir/bin/ghc' -fforce-recomp -dno-debug-output -no-user-package-db
-rtsopts -fno-ghci-history -c T3064.hs +RTS -V0 -tT3064.comp.stats
--machine-readable -RTS >T3064.comp.stderr 2>&1
max_bytes_used value is too high:
Expected max_bytes_used: 12000480 +/-20%
Lower bound max_bytes_used: 9600384
Upper bound max_bytes_used: 14400576
Actual max_bytes_used: 15258696
peak_megabytes_allocated value is too high:
Expected peak_megabytes_allocated: 30 +/-20%
Lower bound peak_megabytes_allocated: 24
Upper bound peak_megabytes_allocated: 36
Actual peak_megabytes_allocated: 37
*** unexpected failure for T3064(normal)
_______________________________________________
ghc-devs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/ghc-devs
