[GHC] #13987: T13701 fails sporadically
#13987: T13701 fails sporadically -------------------------------------+------------------------------------- Reporter: duog | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Test Suite | Version: 8.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Other Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- T13701 fails sporadically, comments in Phab:D3586 indicate that it happens while the system is under load. I reproduced this issue by duplicating T13701 7 times, making tests T13701[A-H], then running {{{ make test TEST="T13701A T13701B T13701C T13701D T13701E T13701F T13701G T13701H THREADS=8" }}} on my box with 4 cpus. Comparing profiling reports of the test under and not under load, I found the additional allocations to be in SysTools.builderMainLoop.loop. This function busy-waits from when 2 EOFs are received until getProcessExitCode returns a Just. That this is the cause was verified by changing {{{ | otherwise -> loop chan hProcess t p exitcode }}} to {{{ | otherwise -> threadDelay 10000 >> loop chan hProcess t p exitcode }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13987 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13987: T13701 fails sporadically -------------------------------------+------------------------------------- Reporter: duog | Owner: duog Type: bug | Status: new Priority: normal | Milestone: Component: Test Suite | Version: 8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by duog): * owner: (none) => duog -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13987#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13987: T13701 fails sporadically -------------------------------------+------------------------------------- Reporter: duog | Owner: duog Type: bug | Status: patch Priority: normal | Milestone: Component: Test Suite | Version: 8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3748 Wiki Page: | -------------------------------------+------------------------------------- Changes (by duog): * status: new => patch * differential: => Phab:D3748 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13987#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#13987: T13701 fails sporadically
-------------------------------------+-------------------------------------
Reporter: duog | Owner: duog
Type: bug | Status: patch
Priority: normal | Milestone:
Component: Test Suite | Version: 8.3
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: Other | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D3748
Wiki Page: |
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Comment (by Ben Gamari
#13987: T13701 fails sporadically -------------------------------------+------------------------------------- Reporter: duog | Owner: duog Type: bug | Status: closed Priority: normal | Milestone: 8.4.1 Component: Test Suite | Version: 8.3 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Other | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3748 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: patch => closed * resolution: => fixed * milestone: => 8.4.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13987#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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