[GC] Add IO related size policy for Parallel GC

Summary: add new parallel gc option UseIOPrioritySizePolicy to early shrink heap when io wait is high. Testing: jtreg Reviewers: maoliang.ml, yude.lyd Issue: #846 CR: https://github.com/dragonwell-project/dragonwell11/pull/
dragonwell-project · Jul 26, 2024 · 7fd0e9d · 7fd0e9d
1 parent 1811fb0
commit 7fd0e9d
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Showing 4 changed files with 308 additions and 7 deletions.
diff --git a/src/hotspot/share/gc/parallel/parallel_globals.hpp b/src/hotspot/share/gc/parallel/parallel_globals.hpp
@@ -78,6 +78,9 @@
           "Delay in scheduling GC workers (in milliseconds)")               \
                                                                             \
   product(bool, PSChunkLargeArrays, true,                                   \
-          "Process large arrays in chunks")
+          "Process large arrays in chunks")                                 \
+                                                                            \
+  product(bool, UseIOPrioritySizePolicy, true,                              \
+          "eagerly decrease heap when io wait is high")                     \
 
 #endif // SHARE_GC_PARALLEL_PARALLEL_GLOBALS_HPP