/*
TEST_HEADER
id = $Id: //info.ravenbrook.com/project/mps/master/test/function/165.c#11 $
summary = simple spare commit limit test
language = c
link = testlib.o rankfmt.o
harness = 2.0
parameters = EXTEND=65536 AVGSIZE=32 BIGSIZE=5000000;
OUTPUT_SPEC
spare_committed0 = 0
spare0 = 0.000000
reduce1 > 4000000
spare_committed1 = 0
spare1 = 0.000000
reduce2 <= 0
spare_committed2 > 4000000
spare2 = 1.000000
reduce3 > 3000000
spare_committed3 < 50000
spare3 = 0.010000
completed = yes
END_HEADER
*/
#include "testlib.h"
#include "mpscmvff.h"
#include "mpsavm.h"
mps_arena_t arena;
#define MAXOBJS (10000)
mps_addr_t objs[MAXOBJS];
mps_addr_t sizes[MAXOBJS];
static void test(void *stack_pointer)
{
mps_pool_t pool;
mps_thr_t thread;
size_t com0, com1, com2;
/* create a VM arena of 40MB with commit limit of 100MB, i.e. let the
arena do the limiting. */
MPS_ARGS_BEGIN(args) {
MPS_ARGS_ADD(args, MPS_KEY_ARENA_SIZE, 1024*1024*40);
MPS_ARGS_ADD(args, MPS_KEY_COMMIT_LIMIT, 1024ul*1024ul*100ul);
MPS_ARGS_ADD(args, MPS_KEY_SPARE, 0.0);
cdie(mps_arena_create_k(&arena, mps_arena_class_vm(), args),
"create arena");
} MPS_ARGS_END(args);
report("spare_committed0", "%lu", (unsigned long)mps_arena_spare_committed(arena));
report("spare0", "%f", mps_arena_spare(arena));
cdie(mps_thread_reg(&thread, arena), "register thread");
MPS_ARGS_BEGIN(args) {
MPS_ARGS_ADD(args, MPS_KEY_EXTEND_BY, EXTEND);
MPS_ARGS_ADD(args, MPS_KEY_MEAN_SIZE, AVGSIZE);
MPS_ARGS_ADD(args, MPS_KEY_MVFF_ARENA_HIGH, 0);
MPS_ARGS_ADD(args, MPS_KEY_MVFF_SLOT_HIGH, 0);
MPS_ARGS_ADD(args, MPS_KEY_MVFF_FIRST_FIT, 1);
/* Set SPARE to 0 as we are testing arena hysteresis here and we
don't want MVFF hysteresis to get in the way. */
MPS_ARGS_ADD(args, MPS_KEY_SPARE, 0.0);
cdie(mps_pool_create_k(&pool, arena, mps_class_mvff(), args),
"create low pool");
} MPS_ARGS_END(args);
die(mps_alloc(&objs[0], pool, BIGSIZE), "alloc");
com0 = mps_arena_committed(arena);
mps_free(pool, objs[0], BIGSIZE);
com1 = mps_arena_committed(arena);
/* the free should have reduced the total amount committed */
report("reduce1", "%ld", com0-com1);
report("spare_committed1", "%lu", (unsigned long)mps_arena_spare_committed(arena));
report("spare1", "%f", mps_arena_spare(arena));
/* Try again but with arena hysteresis */
mps_arena_spare_set(arena, 1.0);
asserts(mps_arena_spare(arena) <= 1.0, "spare");
die(mps_alloc(&objs[0], pool, BIGSIZE), "alloc");
com0 = mps_arena_committed(arena);
mps_free(pool, objs[0], BIGSIZE);
com1 = mps_arena_committed(arena);
/* This time the free shouldn't make any difference */
report("reduce2", "%ld", com0-com1);
report("spare_committed2", "%lu", (unsigned long)mps_arena_spare_committed(arena));
report("spare2", "%f", mps_arena_spare(arena));
/* Reducing the spare committed limit should return most of the spare */
mps_arena_spare_set(arena, 0.01);
com2 = mps_arena_committed(arena);
report("reduce3", "%ld", com0-com2);
report("spare_committed3", "%lu", (unsigned long)mps_arena_spare_committed(arena));
report("spare3", "%f", mps_arena_spare(arena));
mps_pool_destroy(pool);
mps_thread_dereg(thread);
mps_arena_destroy(arena);
}
int main(void)
{
run_test(test);
pass();
return 0;
}