Add more runtime options.
Changed HeapGCThreads to be split into two different options:
-XX:ParallelGCThreads: Which specifies how many threads the GC may
use when the mutators are suspended.
-XX:ConcGCThreads: Which specifies how many threads the GC may use
when the mutators are running.
Added runtime options to specify long pause / long GC thresholds:
-XX:LongPauseThreshold (default 5ms)
-XX:LongGCThreshold (default 100ms)
These thresholds were previously constants, but are now runtime
options. If we exceed either of the thresholds, we print the GC
message.
Added a new runtime option: -XX:IgnoreMaxFootprint which makes it
that the GC only does GC when the number of bytes allocated hits
the growth limit. This causes GC to occur much less frequently and
can be useful to measure how much of an impact GC has on performance.
Changed the GC behaviour to use only one thread when we do not care
about pauses to prevent jank that can be caused by 2 simultaneous GC
on different processes fighting for CPU time.
Added thread pool functionality for changing the maximum number of
active workers.
Fixed an accounting error where we didn't count large objects in the
total freed.
Bug: 9986416
Change-Id: I86afa358d93dcd3780e18ac5d85bdb1a130cb7e7
diff --git a/runtime/runtime.h b/runtime/runtime.h
index 8aba762..6b78ce4 100644
--- a/runtime/runtime.h
+++ b/runtime/runtime.h
@@ -100,13 +100,17 @@
bool interpreter_only_;
bool is_concurrent_gc_enabled_;
bool is_explicit_gc_disabled_;
+ size_t long_pause_log_threshold_;
+ size_t long_gc_log_threshold_;
+ bool ignore_max_footprint_;
size_t heap_initial_size_;
size_t heap_maximum_size_;
size_t heap_growth_limit_;
- size_t heap_gc_threads_;
size_t heap_min_free_;
size_t heap_max_free_;
double heap_target_utilization_;
+ size_t parallel_gc_threads_;
+ size_t conc_gc_threads_;
size_t stack_size_;
bool low_memory_mode_;
size_t lock_profiling_threshold_;