#698: GHC's internal memory allocator never releases memory back to the OS
---------------------------------+------------------------------------------
Reporter: guest | Owner: igloo
Type: bug | Status: new
Priority: low | Milestone: 6.12 branch
Component: Runtime System | Version: 6.4.1
Severity: normal | Resolution:
Keywords: | Difficulty: Moderate (1 day)
Testcase: N/A | Os: Linux
Architecture: Unknown/Multiple |
---------------------------------+------------------------------------------
Comment (by simonmar):
Jeremy - I think what you're describing here is not related to freeing of
memory in the RTS. The virtual memory used by the trivial program is
mostly shared libraries. Try `cat /proc/<pid>/maps` - on my x86_64/Linux
system here, the trivial program without `-threaded` needs 16MB of VM, and
with `-threaded` needs 20MB. The shared library mappings account for most
of the 16MB, and the extra 4MB with `-threaded` is due to the OS threads
which seem to reserve 2MB each. GHC's RTS has only allocated 1MB in each
case, and there is no memory to free back to the OS.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/698#comment:14>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
