/* amcssth.c: POOL CLASS AMC STRESS TEST WITH TWO THREADS
*
* $Id: //info.ravenbrook.com/project/mps/master/code/amcssth.c#41 $
* Copyright (c) 2001-2020 Ravenbrook Limited. See end of file for license.
* Portions copyright (c) 2002 Global Graphics Software.
*
* The main thread parks the arena half way through the test case and
* runs mps_pool_walk() and mps_arena_formatted_objects_walk(). This
* checks that walking works while the other threads continue to
* allocate in the background.
*/
#include "fmtdy.h"
#include "fmtdytst.h"
#include "testlib.h"
#include "testthr.h"
#include "mpslib.h"
#include "mpscamc.h"
#include "mpsavm.h"
#include <stdio.h> /* fflush, printf, putchar */
/* These values have been tuned in the hope of getting one dynamic collection. */
#define testArenaSIZE ((size_t)1000*1024)
#define gen1SIZE ((size_t)150)
#define gen2SIZE ((size_t)170)
#define avLEN 3
#define exactRootsCOUNT 180
#define ambigRootsCOUNT 50
#define genCOUNT 2
#define collectionsCOUNT 37
#define rampSIZE 9
#define initTestFREQ 6000
/* testChain -- generation parameters for the test */
static mps_gen_param_s testChain[genCOUNT] = {
{ gen1SIZE, 0.85 }, { gen2SIZE, 0.45 } };
/* objNULL needs to be odd so that it's ignored in exactRoots. */
#define objNULL ((mps_addr_t)MPS_WORD_CONST(0xDECEA5ED))
static mps_addr_t exactRoots[exactRootsCOUNT];
static mps_addr_t ambigRoots[ambigRootsCOUNT];
static mps_word_t collections;
static mps_arena_t arena;
static mps_root_t exactRoot, ambigRoot;
static unsigned long objs = 0;
/* make -- create one new object */
static mps_addr_t make(mps_ap_t ap, size_t roots_count)
{
size_t length = rnd() % (2*avLEN);
size_t size = (length+2) * sizeof(mps_word_t);
mps_addr_t p;
mps_res_t res;
do {
MPS_RESERVE_BLOCK(res, p, ap, size);
if (res)
die(res, "MPS_RESERVE_BLOCK");
res = dylan_init(p, size, exactRoots, roots_count);
if (res)
die(res, "dylan_init");
} while(!mps_commit(ap, p, size));
return p;
}
/* test_stepper -- stepping function for walk */
static void test_stepper(mps_addr_t object, mps_fmt_t fmt, mps_pool_t pool,
void *p, size_t s)
{
testlib_unused(object); testlib_unused(fmt); testlib_unused(pool);
testlib_unused(s);
(*(unsigned long *)p)++;
}
/* area_scan -- area scanning function for mps_pool_walk */
static mps_res_t area_scan(mps_ss_t ss, void *base, void *limit, void *closure)
{
unsigned long *count = closure;
mps_res_t res;
while (base < limit) {
mps_addr_t prev = base;
++ *count;
res = dylan_scan1(ss, &base);
if (res != MPS_RES_OK) return res;
Insist(prev < base);
}
Insist(base == limit);
return MPS_RES_OK;
}
/* churn -- create an object and install into roots */
static void churn(mps_ap_t ap, size_t roots_count)
{
size_t i;
size_t r;
++objs;
r = (size_t)rnd();
if (r & 1) {
i = (r >> 1) % exactRootsCOUNT;
if (exactRoots[i] != objNULL)
cdie(dylan_check(exactRoots[i]), "dying root check");
exactRoots[i] = make(ap, roots_count);
if (exactRoots[(exactRootsCOUNT-1) - i] != objNULL)
dylan_write(exactRoots[(exactRootsCOUNT-1) - i],
exactRoots, exactRootsCOUNT);
} else {
i = (r >> 1) % ambigRootsCOUNT;
ambigRoots[(ambigRootsCOUNT-1) - i] = make(ap, roots_count);
/* Create random interior pointers */
ambigRoots[i] = (mps_addr_t)((char *)(ambigRoots[i/2]) + 1);
}
}
typedef struct closure_s {
mps_pool_t pool;
size_t roots_count;
} closure_s, *closure_t;
static void *kid_thread(void *arg)
{
void *marker = ▮
mps_thr_t thread1, thread2;
mps_root_t reg_root;
mps_ap_t ap;
closure_t cl = arg;
/* Register the thread twice to check this is supported -- see
* <design/thread-manager#.req.register.multi>
*/
die(mps_thread_reg(&thread1, arena), "thread_reg");
die(mps_thread_reg(&thread2, arena), "thread_reg");
die(mps_root_create_thread(®_root, arena, thread1, marker),
"root_create");
die(mps_ap_create(&ap, cl->pool, mps_rank_exact()), "BufferCreate(fooey)");
while(mps_collections(arena) < collectionsCOUNT) {
churn(ap, cl->roots_count);
}
mps_ap_destroy(ap);
mps_root_destroy(reg_root);
mps_thread_dereg(thread2);
mps_thread_dereg(thread1);
return NULL;
}
/* test -- the body of the test */
static void test_pool(const char *name, mps_pool_t pool, size_t roots_count)
{
size_t i;
mps_word_t rampSwitch;
mps_alloc_pattern_t ramp = mps_alloc_pattern_ramp();
int ramping;
mps_ap_t ap, busy_ap;
mps_addr_t busy_init;
testthr_t kids[10];
closure_s cl;
int walked = FALSE, ramped = FALSE;
printf("\n------ pool: %s-------\n", name);
cl.pool = pool;
cl.roots_count = roots_count;
collections = 0;
for (i = 0; i < NELEMS(kids); ++i)
testthr_create(&kids[i], kid_thread, &cl);
die(mps_ap_create(&ap, pool, mps_rank_exact()), "BufferCreate");
die(mps_ap_create(&busy_ap, pool, mps_rank_exact()), "BufferCreate 2");
/* create an ap, and leave it busy */
die(mps_reserve(&busy_init, busy_ap, 64), "mps_reserve busy");
rampSwitch = rampSIZE;
die(mps_ap_alloc_pattern_begin(ap, ramp), "pattern begin (ap)");
die(mps_ap_alloc_pattern_begin(busy_ap, ramp), "pattern begin (busy_ap)");
ramping = 1;
while (collections < collectionsCOUNT) {
mps_message_type_t type;
if (mps_message_queue_type(&type, arena)) {
mps_message_t msg;
mps_bool_t b = mps_message_get(&msg, arena, type);
Insist(b); /* we just checked there was one */
if (type == mps_message_type_gc()) {
size_t live = mps_message_gc_live_size(arena, msg);
size_t condemned = mps_message_gc_condemned_size(arena, msg);
size_t not_condemned = mps_message_gc_not_condemned_size(arena, msg);
printf("\nCollection %lu finished:\n", (unsigned long)collections++);
printf("live %"PRIuLONGEST"\n", (ulongest_t)live);
printf("condemned %"PRIuLONGEST"\n", (ulongest_t)condemned);
printf("not_condemned %"PRIuLONGEST"\n", (ulongest_t)not_condemned);
} else if (type == mps_message_type_gc_start()) {
printf("\nCollection %lu started, %lu objects, committed=%lu.\n",
(unsigned long)collections, objs,
(unsigned long)mps_arena_committed(arena));
for (i = 0; i < exactRootsCOUNT; ++i)
cdie(exactRoots[i] == objNULL || dylan_check(exactRoots[i]),
"all roots check");
if (collections >= collectionsCOUNT / 2 && !walked)
{
unsigned long count1 = 0, count2 = 0;
mps_arena_park(arena);
mps_arena_formatted_objects_walk(arena, test_stepper, &count1, 0);
die(mps_pool_walk(pool, area_scan, &count2), "mps_pool_walk");
mps_arena_release(arena);
printf("stepped on %lu objects.\n", count1);
printf("walked %lu objects.\n", count2);
walked = TRUE;
}
if (collections >= rampSwitch && !ramped) {
/* Every other time, switch back immediately. */
int begin_ramp = !ramping || (collections & 1);
rampSwitch += rampSIZE;
if (ramping) {
die(mps_ap_alloc_pattern_end(ap, ramp), "pattern end (ap)");
die(mps_ap_alloc_pattern_end(busy_ap, ramp),
"pattern end (busy_ap)");
ramping = 0;
/* kill half of the roots */
for(i = 0; i < exactRootsCOUNT; i += 2) {
if (exactRoots[i] != objNULL) {
cdie(dylan_check(exactRoots[i]), "ramp kill check");
exactRoots[i] = objNULL;
}
}
}
if (begin_ramp) {
die(mps_ap_alloc_pattern_begin(ap, ramp),
"pattern rebegin (ap)");
die(mps_ap_alloc_pattern_begin(busy_ap, ramp),
"pattern rebegin (busy_ap)");
ramping = 1;
}
}
ramped = TRUE;
}
mps_message_discard(arena, msg);
}
churn(ap, roots_count);
{
size_t r = (size_t)rnd();
if (r % initTestFREQ == 0)
*(int*)busy_init = -1; /* check that the buffer is still there */
}
if (objs % 1024 == 0) {
putchar('.');
fflush(stdout);
}
}
(void)mps_commit(busy_ap, busy_init, 64);
mps_ap_destroy(busy_ap);
mps_ap_destroy(ap);
for (i = 0; i < NELEMS(kids); ++i)
testthr_join(&kids[i], NULL);
}
static void test_arena(void)
{
size_t i;
mps_fmt_t format;
mps_chain_t chain;
mps_thr_t thread;
mps_root_t reg_root;
mps_pool_t amc_pool, amcz_pool;
void *marker = ▮
MPS_ARGS_BEGIN(args) {
MPS_ARGS_ADD(args, MPS_KEY_ARENA_SIZE, testArenaSIZE);
MPS_ARGS_ADD(args, MPS_KEY_ARENA_GRAIN_SIZE, rnd_grain(testArenaSIZE));
die(mps_arena_create_k(&arena, mps_arena_class_vm(), args), "arena_create");
} MPS_ARGS_END(args);
mps_message_type_enable(arena, mps_message_type_gc());
mps_message_type_enable(arena, mps_message_type_gc_start());
die(dylan_fmt(&format, arena), "fmt_create");
die(mps_chain_create(&chain, arena, genCOUNT, testChain), "chain_create");
for(i = 0; i < exactRootsCOUNT; ++i)
exactRoots[i] = objNULL;
for(i = 0; i < ambigRootsCOUNT; ++i)
ambigRoots[i] = rnd_addr();
die(mps_root_create_table_masked(&exactRoot, arena,
mps_rank_exact(), (mps_rm_t)0,
&exactRoots[0], exactRootsCOUNT,
(mps_word_t)1),
"root_create_table(exact)");
die(mps_root_create_table(&ambigRoot, arena,
mps_rank_ambig(), (mps_rm_t)0,
&ambigRoots[0], ambigRootsCOUNT),
"root_create_table(ambig)");
die(mps_thread_reg(&thread, arena), "thread_reg");
die(mps_root_create_thread(®_root, arena, thread, marker),
"root_create");
die(mps_pool_create(&amc_pool, arena, mps_class_amc(), format, chain),
"pool_create(amc)");
die(mps_pool_create(&amcz_pool, arena, mps_class_amcz(), format, chain),
"pool_create(amcz)");
test_pool("AMC", amc_pool, exactRootsCOUNT);
test_pool("AMCZ", amcz_pool, 0);
mps_arena_park(arena);
mps_pool_destroy(amc_pool);
mps_pool_destroy(amcz_pool);
mps_root_destroy(reg_root);
mps_thread_dereg(thread);
mps_root_destroy(exactRoot);
mps_root_destroy(ambigRoot);
mps_chain_destroy(chain);
mps_fmt_destroy(format);
mps_arena_destroy(arena);
}
int main(int argc, char *argv[])
{
testlib_init(argc, argv);
test_arena();
printf("%s: Conclusion: Failed to find any defects.\n", argv[0]);
return 0;
}
/* C. COPYRIGHT AND LICENSE
*
* Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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