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[release/7.0] fix lower heap hard limit condition for regions #76588

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Merged
carlossanlop merged 8 commits into from
Oct 5, 2022
Merged

[release/7.0] fix lower heap hard limit condition for regions #76588

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ebeab20
fix lower heap hard limit condition for regions
mangod9 Sep 29, 2022
6eaf767
adjust region sizes based on individual heap sizes
mangod9 Sep 30, 2022
8c095e2
updated comment
mangod9 Sep 30, 2022
a41bff2
more tuning
mangod9 Sep 30, 2022
13bf5dd
on more tuning update.
mangod9 Sep 30, 2022
8ceb001
fixing the case for per heap hard_limit and some styling changes.
mangod9 Oct 3, 2022
5ebfcb2
CR updates
mangod9 Oct 3, 2022
ed6da61
small refactor
mangod9 Oct 4, 2022
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on more tuning update.
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@mangod9
mangod9 authored and github-actions committed Oct 4, 2022
commit 13bf5ddc4df0efeec1eed7c11e167e48ad51ed78
9 changes: 5 additions & 4 deletions src/coreclr/gc/gc.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -45055,12 +45055,13 @@ HRESULT GCHeap::Initialize()
size_t gc_region_size = (size_t)GCConfig::GetGCRegionSize();

// Adjust GCRegionSize based on how large each heap would be, for smaller heaps we would
// like to keep Region sizes small. We choose between 4, 2 and 4mb based on the calculations
// below (unless its configured explictly).
// like to keep Region sizes small. We choose between 4, 2 and 1mb based on the calculations
// below (unless its configured explictly) such that there are at least 2 regions available
// except for the smallest case. Now the lowest limit possible is 4mb.
if (gc_region_size == 0){
if (gc_heap::regions_range / nhp / 19 >= (4 * 1024 * 1024)){
if ((gc_heap::regions_range / nhp / 19) / 2 >= (4 * 1024 * 1024)){
gc_region_size = 4 * 1024 * 1024;
} else if (gc_heap::regions_range / nhp / 19 >= (2 * 1024 * 1024)){
} else if ((gc_heap::regions_range / nhp / 19) / 2 >= (2 * 1024 * 1024)){
gc_region_size = 2 * 1024 * 1024;
} else
gc_region_size = 1 * 1024 * 1024;
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