[commit: ghc] master: Bump haddock.base max_bytes_used (8df7fea)

[Simon Peyton Jones]

OK, so perhaps we should just bump the limit?  max_bytes_used is an unreliable meause

| -----Original Message-----
| From: mad.one at gmail.com [mailto:mad.one at gmail.com] On Behalf Of Austin
| Seipp
| Sent: 04 August 2014 12:04
| To: Edward Z. Yang
| Cc: Simon Peyton Jones; Joachim Breitner; ghc-devs at haskell.org
| Subject: Re: [commit: ghc] master: Bump haddock.base max_bytes_used
| (8df7fea)
| 
| This is also happening on Phabricator, which is causing the buildbot to
| choke:
| 
| https://phabricator.haskell.org/D112#4
| 
| On Mon, Aug 4, 2014 at 6:02 AM, Edward Z. Yang <ezyang at mit.edu> wrote:
| > Yes, on my box, this test is now failing (because the stat is too
| good):
| >
| >     Expected    haddock.base(normal) max_bytes_used: 127954488 +/-10%
| >     Lower bound haddock.base(normal) max_bytes_used: 115159039
| >     Upper bound haddock.base(normal) max_bytes_used: 140749937
| >     Actual      haddock.base(normal) max_bytes_used: 113167424
| >     Deviation   haddock.base(normal) max_bytes_used:     -11.6 %
| >
| > Cheers,
| > Edward
| >
| > Excerpts from Simon Peyton Jones's message of 2014-08-04 08:21:50
| +0100:
| >> Ha.  max_bytes_used is vulnerable to exactly when gc strikes, so I'm
| disinclined to get stressed about this.  I was mis-reading it as bytes-
| allocated.  Interestingly it doesn't happen for me.
| >>
| >> Simon
| >>
| >> | -----Original Message-----
| >> | From: ghc-devs [mailto:ghc-devs-bounces at haskell.org] On Behalf Of
| >> | Joachim Breitner
| >> | Sent: 01 August 2014 22:27
| >> | To: ghc-devs at haskell.org
| >> | Subject: Re: [commit: ghc] master: Bump haddock.base max_bytes_used
| >> | (8df7fea)
| >> |
| >> | Hi,
| >> |
| >> |
| >> | Am Freitag, den 01.08.2014, 20:28 +0000 schrieb Simon Peyton Jones:
| >> | > Urk.  It's quite surprising that this particular change would
| >> | increase allocation significantly.
| >> | > I wonder whether it just pushed it over the threshold.
| >> |
| >> | I’m confident it was not just that:
| >> |
| >> | ~/logs $ fgrep 'Deviation   haddock.base(normal) max_bytes_used'
| $(cd
| >> | ghc-master; git log --oneline --first-parent
| >> | db19c665ec5055c2193b2174519866045aeff09a..HEAD | cut -d\  -f1| (cd
| ..;
| >> | while read x ; do test -e $x.log && echo $x.log; done) |tac )|tail -
| n
| >> | 25
| >> | 6fa6caa.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 2.2 %
| >> | a0ff1eb.log:    Deviation   haddock.base(normal) max_bytes_used:
| -
| >> | 1.0 %
| >> | 0be7c2c.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 2.2 %
| >> | dc7d3c2.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 2.2 %
| >> | 7381cee.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 2.2 %
| >> | fe2d807.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 2.2 %
| >> | bfaa179.log:    Deviation   haddock.base(normal) max_bytes_used:
| -
| >> | 0.9 %
| >> | 1ae5fa4.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | c97f853.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | fd47e26.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.2 %
| >> | bdf0ef0.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.1 %
| >> | 58ed1cc.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | 1c1ef82.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.2 %
| >> | 52188ad.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | 3b9fe0c.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.2 %
| >> | 6483b8a.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | 9d9a554.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.2 %
| >> | 028630a.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.2 %
| >> | aab5937.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | 6c06db1.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.0 %
| >> | 2989ffd.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.1 %
| >> | d4d4bef.log:    Deviation   haddock.base(normal) max_bytes_used:
| >> | 11.2 %
| >> | 8df7fea.log:    Deviation   haddock.base(normal) max_bytes_used:
| -
| >> | 0.0 %
| >> | 3faff73.log:    Deviation   haddock.base(normal) max_bytes_used:
| -
| >> | 0.0 %
| >> | 02975c9.log:    Deviation   haddock.base(normal) max_bytes_used:
| -
| >> | 0.1 %
| >> |
| >> |
| >> | (If this were a bytes_allocated test I could also show you nice
| graphs
| >> | like http://ghcspeed-nomeata.rhcloud.com/timeline/?exe=2&base=2%
| >> | 2B68&ben=tests%2Falloc%2FT6048&env=1&revs=50&equid=on but I didn’t
| add
| >> | the max_bytes_used tests yet.)
| >> |
| >> | Interestingly, bytes_allocated did not change a bit!
| >> |
| >> | Greetings,
| >> | Joachim
| >> |
| >> | --
| >> | Joachim “nomeata” Breitner
| >> |   mail at joachim-breitner.de • http://www.joachim-breitner.de/
| >> |   Jabber: nomeata at joachim-breitner.de  • GPG-Key: 0xF0FBF51F
| >> |   Debian Developer: nomeata at debian.org
| >>
| > _______________________________________________
| > ghc-devs mailing list
| > ghc-devs at haskell.org
| > http://www.haskell.org/mailman/listinfo/ghc-devs
| 
| 
| 
| --
| Regards,
| 
| Austin Seipp, Haskell Consultant
| Well-Typed LLP, http://www.well-typed.com/