/*
TEST_HEADER
id = $HopeName: MMQA_test_function!165.c(trunk.1) $
summary = simple spare_commit_limit test
language = c
link = testlib.o rankfmt.o
harness = 2.0
parameters = EXTEND=65536 AVGSIZE=32 ALIGN=4 BIGSIZE=5000000;
OUTPUT_SPEC
reduce1 > 4000000
reduce2 <= 0
reduce3 > 4000000
completed = yes
END_HEADER
*/
#include "testlib.h"
#include "mpscmvff.h"
#include "mpsavm.h"
#define MVFF_HI_PARMS EXTEND,AVGSIZE,ALIGN,1,1,0
#define MVFF_LO_PARMS EXTEND,AVGSIZE,ALIGN,0,0,1
mps_arena_t arena;
#define MAXOBJS (10000)
mps_addr_t objs[MAXOBJS];
mps_addr_t sizes[MAXOBJS];
static void test(void)
{
mps_pool_t poolhi, poollo;
mps_thr_t thread;
unsigned long com0, com1, com2;
/* create a VM arena of 30MB */
cdie(mps_arena_create(&arena, mps_arena_class_vmnz(), (size_t) (1024*1024*40)),
"create arena");
/* set the commit limit to 100MB, i.e. let the arena do the limiting */
mps_arena_commit_limit_set(arena, (size_t) (1024ul*1024ul*100ul));
cdie(mps_thread_reg(&thread, arena), "register thread");
cdie(
mps_pool_create(&poolhi, arena, mps_class_mvff(), MVFF_HI_PARMS),
"create high pool");
cdie(
mps_pool_create(&poollo, arena, mps_class_mvff(), MVFF_LO_PARMS),
"create low pool");
/* Set the spare commit limit to 0MB */
mps_arena_spare_commit_limit_set(arena, (size_t) 0);
die(mps_alloc(&objs[0], poollo, BIGSIZE), "alloc");
com0 = mps_arena_committed(arena);
mps_free(poollo, objs[0], BIGSIZE);
com1 = mps_arena_committed(arena);
/* the free should have reduced the total amount committed */
report("reduce1", "%ld", com0-com1);
/* Try again but with arena hysteresis */
/* nb. size_t unsigned, therefore (size_t)-1 is the maximum limit */
mps_arena_spare_commit_limit_set(arena, (size_t)-1);
die(mps_alloc(&objs[0], poollo, BIGSIZE), "alloc");
com0 = mps_arena_committed(arena);
mps_free(poollo, objs[0], BIGSIZE);
com1 = mps_arena_committed(arena);
/* This time the free shouldn't make any difference */
report("reduce2", "%ld", com0-com1);
/* Reducing the spare committed limit should return most of the spare */
mps_arena_spare_commit_limit_set(arena, (size_t)(1024*1024));
com2 = mps_arena_committed(arena);
report("reduce3", "%ld", com0-com2);
comment("Finishing off.");
mps_pool_destroy(poolhi);
mps_pool_destroy(poollo);
comment("Destroyed pool.");
mps_thread_dereg(thread);
comment("Deregistered thread.");
mps_arena_destroy(arena);
comment("Destroyed arena.");
}
int main(void)
{
easy_tramp(test);
pass();
return 0;
}