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| author | Simon Marlow <marlowsd@gmail.com> | 2012-11-16 09:22:00 +0000 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2012-11-16 11:26:20 +0000 |
| commit | 6d784c43592290ec16db8b7f0f2a012dff3ed497 (patch) | |
| tree | a317ef1fc1ee40883e92cde308c292f7125db2b7 /rts/StgMiscClosures.cmm | |
| parent | 97dc57c6e2bdbddd0a0170a283149a570a07179c (diff) | |
| download | haskell-6d784c43592290ec16db8b7f0f2a012dff3ed497.tar.gz | |
Add a write barrier for TVAR closures
This improves GC performance when there are a lot of TVars in the
heap. For instance, a TChan with a lot of elements causes a massive
GC drag without this patch.
There's more to do - several other STM closure types don't have write
barriers, so GC performance when there are a lot of threads blocked on
STM isn't great. But fixing the problem for TVar is a good start.
Diffstat (limited to 'rts/StgMiscClosures.cmm')
| -rw-r--r-- | rts/StgMiscClosures.cmm | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/rts/StgMiscClosures.cmm b/rts/StgMiscClosures.cmm index e6a30e67a3..4341013d5d 100644 --- a/rts/StgMiscClosures.cmm +++ b/rts/StgMiscClosures.cmm @@ -474,8 +474,11 @@ INFO_TABLE(stg_MVAR_DIRTY,3,0,MVAR_DIRTY,"MVAR","MVAR") STM -------------------------------------------------------------------------- */ -INFO_TABLE(stg_TVAR, 2, 1, MUT_PRIM, "TVAR", "TVAR") -{ foreign "C" barf("TVAR object entered!") never returns; } +INFO_TABLE(stg_TVAR_CLEAN, 2, 1, TVAR, "TVAR", "TVAR") +{ foreign "C" barf("TVAR_CLEAN object entered!") never returns; } + +INFO_TABLE(stg_TVAR_DIRTY, 2, 1, TVAR, "TVAR", "TVAR") +{ foreign "C" barf("TVAR_DIRTY object entered!") never returns; } INFO_TABLE(stg_TVAR_WATCH_QUEUE, 3, 0, MUT_PRIM, "TVAR_WATCH_QUEUE", "TVAR_WATCH_QUEUE") { foreign "C" barf("TVAR_WATCH_QUEUE object entered!") never returns; } |