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[#311058] Haskell GHC: parallel thread-ring

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Date:
2008-09-08 01:18		 Priority:
3
State:
Closed
Submitted by:
Don Stewart (dons-guest) 		Assigned to:
Nobody (None)
Category:
Haskell GHC		 Group:
thread-ring (new)
Resolution:
Accepted		  
Summary:
Haskell GHC: parallel thread-ring

Detailed description
Parallelisation strategy for thread-ring: place segments of the thread ring on each cpu, to prevent migration. Should get around the speed of one core, if the token is passed efficiently.

On my quad core:

* old program:
103 seconds

* this program:
9 seconds

Flags:

Compilation flags are:

ghc -O2 -threaded

*Important runtime flags*:

+RTS -N4 -qm -qw -RTS

(Use 4 capabilities, don't migrate threads, wake up on the current cpu).

Followup

No Followups Have Been Posted

Attached Files:

Attachments:
A.hs

Changes:

Field Old Value Date By
status_idOpen2008-09-12 17:08igouy-guest
close_date2008-09-12 17:082008-09-12 17:08igouy-guest
ResolutionNone2008-09-12 17:08igouy-guest
File Added2753: A.hs2008-09-08 01:18dons-guest
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