diff options
Diffstat (limited to 'contrib/gcc/ggc-common.c')
| -rw-r--r-- | contrib/gcc/ggc-common.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/contrib/gcc/ggc-common.c b/contrib/gcc/ggc-common.c index fe75320..0c9a33f 100644 --- a/contrib/gcc/ggc-common.c +++ b/contrib/gcc/ggc-common.c @@ -716,10 +716,12 @@ ggc_min_expand_heuristic (void) min_expand = ggc_rlimit_bound (min_expand); /* The heuristic is a percentage equal to 30% + 70%*(RAM/1GB), yielding - a lower bound of 30% and an upper bound of 100% (when RAM >= 1GB). */ + APPLE LOCAL retune gc params 6124839 + a lower bound of 30% and an upper bound of 150% (when RAM >= 1.7GB). */ min_expand /= 1024*1024*1024; min_expand *= 70; - min_expand = MIN (min_expand, 70); + /* APPLE LOCAL retune gc params 6124839 */ + min_expand = MIN (min_expand, 120); min_expand += 30; return min_expand; @@ -727,7 +729,8 @@ ggc_min_expand_heuristic (void) /* Heuristic to set a default for GGC_MIN_HEAPSIZE. */ int -ggc_min_heapsize_heuristic (void) +/* APPLE LOCAL retune gc params 6124839 */ +ggc_min_heapsize_heuristic (bool optimize) { double phys_kbytes = physmem_total(); double limit_kbytes = ggc_rlimit_bound (phys_kbytes * 2); @@ -739,6 +742,13 @@ ggc_min_heapsize_heuristic (void) bound of 128M (when RAM >= 1GB). */ phys_kbytes /= 8; + /* APPLE LOCAL begin retune gc params 6124839 */ + + /* Additionally, on a multicore machine, we assume that we share the + memory with others reasonably equally. */ + phys_kbytes /= (double)ncpu_available() / (2 - optimize); + /* APPLE LOCAL end retune gc params 6124839 */ + #if defined(HAVE_GETRLIMIT) && defined (RLIMIT_RSS) /* Try not to overrun the RSS limit while doing garbage collection. The RSS limit is only advisory, so no margin is subtracted. */ @@ -765,11 +775,13 @@ ggc_min_heapsize_heuristic (void) } void -init_ggc_heuristics (void) +/* APPLE LOCAL retune gc params 6124839 */ +init_ggc_heuristics (bool optimize ATTRIBUTE_UNUSED) { #if !defined ENABLE_GC_CHECKING && !defined ENABLE_GC_ALWAYS_COLLECT set_param_value ("ggc-min-expand", ggc_min_expand_heuristic()); - set_param_value ("ggc-min-heapsize", ggc_min_heapsize_heuristic()); + /* APPLE LOCAL retune gc params 6124839 */ + set_param_value ("ggc-min-heapsize", ggc_min_heapsize_heuristic(optimize)); #endif } |
