RFR (XS) 8232908: Shenandoah: compact heuristics has incorrect trigger "Free is lower than allocated recently"

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8232908

See the discussion in the bug. The fix is to remove the offending trigger:

diff -r da4578a0f73d src/hotspot/share/gc/shenandoah/heuristics/shenandoahCompactHeuristics.cpp
--- a/src/hotspot/share/gc/shenandoah/heuristics/shenandoahCompactHeuristics.cpp        Mon Sep 30
22:39:11 2019 +0200
+++ b/src/hotspot/share/gc/shenandoah/heuristics/shenandoahCompactHeuristics.cpp        Wed Oct 23
20:14:48 2019 +0200
@@ -66,11 +66,4 @@
   }

-  if (available < threshold_bytes_allocated) {
-    log_info(gc)("Trigger: Free (" SIZE_FORMAT "%s) is lower than allocated recently (" SIZE_FORMAT
"%s)",
-                 byte_size_in_proper_unit(available),
proper_unit_for_byte_size(available),
-                 byte_size_in_proper_unit(threshold_bytes_allocated),
proper_unit_for_byte_size(threshold_bytes_allocated));
-    return true;
-  }
-
   size_t bytes_allocated = heap->bytes_allocated_since_gc_start();
   if (bytes_allocated > threshold_bytes_allocated) {


Testing: hotspot_gc_shenandoah

-- 
Thanks,
-Aleksey