On 06/11/2014 09:56, Simon Peyton Jones wrote:
| Oh, and the reason you have the debug RTS in your compiler is because
| `-ticky` implies `-debug
Interesting. I didn't know that. Is that a good idea? Wouldn't it be better
to make them independent?
See #3439, as you'll note it was your idea too :)
The alternative is worse: if they were separate, then we have to
multiply the number of variants of the RTS we currently have by two
(non-ticky and ticky). We currently build 6-8 versions of the RTS
depending on whether you have profiling on, and if ticky were a separate
option it would double that number. You could choose not to build some
of the combinations, but then you might be surprised when -ticky doesn't
work with some other option.
The other part of the rationale is that if you're using -ticky then
you're already taking a performance hit from the counters, so adding
more overhead, in the form of the extra checks that -debug does, doesn't
hurt.
Cheers,
Simon
Simon
| -----Original Message-----
| From: ghc-tickets [mailto:ghc-tickets-boun...@haskell.org] On Behalf
| Of GHC
| Sent: 06 November 2014 08:37
| Cc: ghc-tick...@haskell.org
| Subject: Re: [GHC] #9741: Interpreter stack checks are not quite right
|
| #9741: Interpreter stack checks are not quite right
| -------------------------------------+--------------------------------
| --
| -------------------------------------+---
| Reporter: simonpj | Owner: simonmar
| Type: bug | Status: closed
| Priority: highest | Milestone: 7.10.1
| Component: Compiler | Version: 7.8.3
| Resolution: fixed | Keywords:
| Operating System: | Architecture:
| Unknown/Multiple
| Unknown/Multiple | Difficulty: Unknown
| Type of failure: | Blocked By:
| None/Unknown | Related Tickets:
| Test Case: |
| Blocking: |
| Differential Revisions: |
| -------------------------------------+--------------------------------
| --
| -------------------------------------+---
|
| Comment (by simonmar):
|
| Oh, and the reason you have the debug RTS in your compiler is because
| `-ticky` implies `-debug`. Incidentally this is probably slowing down
| your builds quite a lot, so you might want to turn it off.
|
| --
| Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9741#comment:5>
| GHC <http://www.haskell.org/ghc/>
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