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GC back to controling pace counting bytes

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Memory is the resource we want to save. Still to be reviewed again.
This commit is contained in:
Roberto Ierusalimschy
2024-09-19 19:02:14 -03:00
parent b443145ff3
commit ddfa1fbccf
11 changed files with 247 additions and 202 deletions
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34
lgc.h
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@@ -23,8 +23,9 @@
** never point to a white one. Moreover, any gray object must be in a
** "gray list" (gray, grayagain, weak, allweak, ephemeron) so that it
** can be visited again before finishing the collection cycle. (Open
** upvalues are an exception to this rule.) These lists have no meaning
** when the invariant is not being enforced (e.g., sweep phase).
** upvalues are an exception to this rule, as they are attached to
** a corresponding thread.) These lists have no meaning when the
** invariant is not being enforced (e.g., sweep phase).
*/
@@ -48,10 +49,10 @@
/*
** macro to tell when main invariant (white objects cannot point to black
** ones) must be kept. During a collection, the sweep
** phase may break the invariant, as objects turned white may point to
** still-black objects. The invariant is restored when sweep ends and
** all objects are white again.
** ones) must be kept. During a collection, the sweep phase may break
** the invariant, as objects turned white may point to still-black
** objects. The invariant is restored when sweep ends and all objects
** are white again.
*/
#define keepinvariant(g) ((g)->gcstate <= GCSatomic)
@@ -163,34 +164,37 @@
/*
** Minor collections will shift to major ones after LUAI_MINORMAJOR%
** objects become old.
** bytes become old.
*/
#define LUAI_MINORMAJOR 100
/*
** Major collections will shift to minor ones after a collection
** collects at least LUAI_MAJORMINOR% of the new objects.
** collects at least LUAI_MAJORMINOR% of the new bytes.
*/
#define LUAI_MAJORMINOR 50
/*
** A young (minor) collection will run after creating LUAI_GENMINORMUL%
** new objects.
** new bytes.
*/
#define LUAI_GENMINORMUL 25
/* incremental */
/* Number of objects must be LUAI_GCPAUSE% before starting new cycle */
/* Number of bytes must be LUAI_GCPAUSE% before starting new cycle */
#define LUAI_GCPAUSE 200
/* Step multiplier. (Roughly, the collector handles LUAI_GCMUL% objects
for each new allocated object.) */
#define LUAI_GCMUL 200
/*
** Step multiplier: The collector handles LUAI_GCMUL% work units for
** each new allocated byte. (Each "work unit" corresponds roughly to
** sweeping or marking one object.)
*/
#define LUAI_GCMUL 20 /* ??? */
/* How many objects to allocate before next GC step */
#define LUAI_GCSTEPSIZE 250
/* How many bytes to allocate before next GC step */
#define LUAI_GCSTEPSIZE (250 * sizeof(void*))
#define setgcparam(g,p,v) (g->gcparams[LUA_GCP##p] = luaO_codeparam(v))