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Add build option for changing the heap limit (#3005)

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This change adds a build option that allows adjusting the garbage
collection heap usage limit, which can be used to fine-tune how often
garbage collection should be triggered.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu
This commit is contained in:
Dániel Bátyai
2019-08-06 13:35:26 +02:00
committed by Robert Fancsik
parent dec9dbc926
commit 3b7475b01d
6 changed files with 56 additions and 11 deletions
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jerry-core/jcontext/jcontext.h
+11 -3
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@@ -50,12 +50,20 @@
/**
* Max heap usage limit
*/
#define CONFIG_MEM_HEAP_MAX_LIMIT 8192
#define CONFIG_MAX_GC_LIMIT 8192
/**
* Desired limit of heap usage
* Allowed heap usage limit until next garbage collection
*
* Whenever the total allocated memory size reaches the current heap limit, garbage collection will be triggered
* to try and reduce clutter from unreachable objects. If the allocated memory can't be reduced below the limit,
* then the current limit will be incremented by CONFIG_MEM_HEAP_LIMIT.
*/
#define CONFIG_MEM_HEAP_DESIRED_LIMIT (JERRY_MIN (CONFIG_MEM_HEAP_SIZE / 32, CONFIG_MEM_HEAP_MAX_LIMIT))
#if defined (JERRY_GC_LIMIT) && (JERRY_GC_LIMIT != 0)
#define CONFIG_GC_LIMIT JERRY_GC_LIMIT
#else
#define CONFIG_GC_LIMIT (JERRY_MIN (CONFIG_MEM_HEAP_SIZE / 32, CONFIG_MAX_GC_LIMIT))
#endif
/**
* Amount of newly allocated objects since the last GC run, represented as a fraction of all allocated objects,