Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 2188:c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
7007446: G1: expand the heap with a single step, not one region at a time
Summary: Changed G1CollectedHeap::expand() to expand the committed space by calling VirtualSpace::expand_by() once rather than for every region in the expansion amount. This allows the success or failure of the expansion to be determined before creating any heap regions. Introduced a develop flag G1ExitOnExpansionFailure (false by default) that, when true, will exit the VM if the expansion of the committed space fails. Finally G1CollectedHeap::expand() returns a status back to it's caller so that the caller knows whether to attempt the allocation.
Reviewed-by: brutisso, tonyp
| author | johnc |
|---|---|
| date | Wed, 02 Feb 2011 10:41:20 -0800 |
| parents | 0fa27f37d4d4 |
| children | c93aa6caa02f |
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| 2187:986b2844f7a2 | 2188:c33825b68624 |
|---|---|
| 2009 // We will double the existing space, or take | 2009 // We will double the existing space, or take |
| 2010 // G1ExpandByPercentOfAvailable % of the available expansion | 2010 // G1ExpandByPercentOfAvailable % of the available expansion |
| 2011 // space, whichever is smaller, bounded below by a minimum | 2011 // space, whichever is smaller, bounded below by a minimum |
| 2012 // expansion (unless that's all that's left.) | 2012 // expansion (unless that's all that's left.) |
| 2013 const size_t min_expand_bytes = 1*M; | 2013 const size_t min_expand_bytes = 1*M; |
| 2014 size_t reserved_bytes = _g1->g1_reserved_obj_bytes(); | 2014 size_t reserved_bytes = _g1->max_capacity(); |
| 2015 size_t committed_bytes = _g1->capacity(); | 2015 size_t committed_bytes = _g1->capacity(); |
| 2016 size_t uncommitted_bytes = reserved_bytes - committed_bytes; | 2016 size_t uncommitted_bytes = reserved_bytes - committed_bytes; |
| 2017 size_t expand_bytes; | 2017 size_t expand_bytes; |
| 2018 size_t expand_bytes_via_pct = | 2018 size_t expand_bytes_via_pct = |
| 2019 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100; | 2019 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100; |