#850: threaded RTS uses SIGALRM
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Reporter: simonmar | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.6.1
Component: Runtime System | Version: 6.4.2
Severity: normal | Keywords:
Os: Unknown | Difficulty: Unknown
Architecture: Unknown |
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The threaded RTS uses SIGALRM for its timer signal, this is a bit naughty
and could interfere with use of SIGALRM by the application. Also it can
cause EINTR of system calls, which the application might not be prepared
to handle. Some system calls can't be reliably restarted (eg. usleep()).
The single threaded RTS uses SIGVTALRM, but we can't use this in the
multithreaded RTS because it ticks in CPU time, and our threads might be
idle. Ideally we should be using the timer_*() family of functions, if
supported.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/850>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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