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Process.warmup: invoke malloc_trim if available

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Similar to releasing free GC pages, releasing free malloc pages
reduce the amount of page faults post fork.
This commit is contained in:
Jean Boussier 2023-09-15 16:22:09 +02:00 committed by Jean Boussier
parent 28fe88468d
commit efe2822708
3 changed files with 6 additions and 0 deletions
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1
configure.ac
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@ -2078,6 +2078,7 @@ AC_CHECK_FUNCS(lstat)
AC_CHECK_FUNCS(lutimes) AC_CHECK_FUNCS(lutimes)
AC_CHECK_FUNCS(malloc_usable_size) AC_CHECK_FUNCS(malloc_usable_size)
AC_CHECK_FUNCS(malloc_size) AC_CHECK_FUNCS(malloc_size)
AC_CHECK_FUNCS(malloc_trim)
AC_CHECK_FUNCS(mblen) AC_CHECK_FUNCS(mblen)
AC_CHECK_FUNCS(memalign) AC_CHECK_FUNCS(memalign)
AC_CHECK_FUNCS(memset_s) AC_CHECK_FUNCS(memset_s)

4
gc.c
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@ -9740,6 +9740,10 @@ rb_gc_prepare_heap(void)
rb_objspace_each_objects(gc_set_candidate_object_i, NULL); rb_objspace_each_objects(gc_set_candidate_object_i, NULL);
gc_start_internal(NULL, Qtrue, Qtrue, Qtrue, Qtrue, Qtrue); gc_start_internal(NULL, Qtrue, Qtrue, Qtrue, Qtrue, Qtrue);
free_empty_pages(); free_empty_pages();
#if defined(HAVE_MALLOC_TRIM) && !defined(RUBY_ALTERNATIVE_MALLOC_HEADER)
malloc_trim(0);
#endif
} }
static int static int

1
process.c
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@ -8789,6 +8789,7 @@ static VALUE rb_mProcID_Syscall;
* * Precomputes the coderange of all strings. * * Precomputes the coderange of all strings.
* * Frees all empty heap pages and increments the allocatable pages counter * * Frees all empty heap pages and increments the allocatable pages counter
* by the number of pages freed. * by the number of pages freed.
* * Invoke +malloc_trim+ if available to free empty malloc pages.
*/ */
static VALUE static VALUE