AbstractMemory *
direct_cache_create(ConfigFile *cfg, const char *var_prefix,
StatisticsInfo *info, AbstractMemory *mem, Random *rnd)
{
char buf[1024];
DirectCache *c = (DirectCache*) xcalloc(1, sizeof(*c));
c->b.info = info;
const char *strategy = config_file_get(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "write_strategy"));
if (!strategy) {
error_undefined("direct_cache_create", buf);
} else if (!strcmp(strategy, "write-through")) {
c->b.ops = &direct_cache_wt_ops;
c->direct_ops.finalize = direct_cache_wt_finalize;
} else if (!strcmp(strategy, "write-back")) {
c->b.ops = &direct_cache_wb_ops;
c->direct_ops.finalize = direct_cache_wb_finalize;
} else {
error_invalid("direct_cache_create", buf);
}
c->mem = mem;
int r;
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "block_count"),
&c->block_count);
if (!r) {
error_undefined("direct_cache_create", buf);
} else if (r < 0) {
error_invalid("direct_cache_create", buf);
}
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "block_size"),
&c->block_size);
if (!r) {
error_undefined("direct_cache_create", buf);
} else if (r < 0 || c->block_size <= 0 || c->block_size % 16 != 0
|| c->block_size == 0 || c->block_size > 64
|| c->block_size == 48) {
error_invalid("direct_cache_create", buf);
}
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "cache_size"),
&c->cache_size);
if (!r) {
error_undefined("direct_cache_create", buf);
} else if (r < 0 || c->cache_size <= 0 || c->cache_size > MAX_CACHE_SIZE
|| c->cache_size % c->block_size != 0) {
error_invalid("direct_cache_create", buf);
}
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "cache_read_time"),
&c->cache_read_time);
if (!r) {
error_undefined("direct_cache_create", buf);
} else if (r < 0 || c->cache_read_time <= 0
|| c->cache_read_time > MAX_READ_TIME) {
error_invalid("direct_cache_create", buf);
}
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "cache_write_time"),
&c->cache_write_time);
if (!r) {
error_undefined("direct_cache_create", buf);
} else if (r < 0 || c->cache_write_time <= 0
|| c->cache_write_time > MAX_WRITE_TIME) {
error_invalid("direct_cache_create", buf);
}
c->blocks = (DirectCacheBlock *) xcalloc(1, c->block_count);
for (int i = 0; i < c->block_count; ++i) {
c->blocks[i].addr = 0;
c->blocks[i].dirty = 0;
c->blocks[i].mem = (MemoryCell *) xcalloc(1, c->block_size);
for (int j = 0; j < c->block_size; ++j) {
c->blocks[i].mem[j].flags = 0;
c->blocks[i].mem[j].value = 42;
}
}
return (AbstractMemory*) c;
}
/*!
Создать модель полноассоциативного кеша
\param cfg Указатель на структуру, хранящую конфигурационные параметры
\param var_prefix Префикс имен параметров
\param info Указатель на структуру, хранящую статистику моделирования
\return Указатель на структуру описания модели полноассоциативного кеша (в виде указателя на базовую структуру),
NULL в случае ошибки
*/
AbstractMemory *
full_cache_create(
ConfigFile *cfg,
const char *var_prefix,
StatisticsInfo *info,
AbstractMemory *mem,
Random *rnd)
{
char buf[PARAM_BUF_SIZE];
FullCache *c = (FullCache*) calloc(1, sizeof(*c));
c->b.info = info;
c->rnd = rnd;
c->mem = mem;
c->blocks = NULL;
c->block_count = 0;
//определяем стратегию записи и соответственно задаём операции:
const char fn[] = "full_cache_create";
const char *strategy = config_file_get(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "write_strategy"));
if (!strategy) {
error_undefined(fn, buf);
goto full_cache_create_failed;
} else if (strcmp(strategy, "write-through") == 0) {
c->b.ops = &full_cache_wt_ops;
c->full_ops.finalize = full_cache_wt_finalize;
} else if (strcmp(strategy, "write-back") == 0) {
c->b.ops = &full_cache_wb_ops;
c->full_ops.finalize = full_cache_wb_finalize;
c->b.info->write_back_needed = 1;
} else {
error_invalid(fn, buf);
goto full_cache_create_failed;
}
//определяем стратегию замещения и соответственно задаём функцию размещения:
strategy = config_file_get(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "replacement_strategy"));
if (!strategy) {
error_undefined(fn, buf);
goto full_cache_create_failed;
} else if (strcmp(strategy, "random") == 0) {
c->full_ops.cache_place = full_cache_random_place;
} else {
error_invalid(fn, buf);
goto full_cache_create_failed;
}
// считываем и проверяем параметр block_size:
int r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "block_size"),
&c->block_size);
if (!r) {
error_undefined(fn, buf);
goto full_cache_create_failed;
} else if (r < 0 || !is_correct_block_size(c->block_size)) {
error_invalid(fn, buf);
goto full_cache_create_failed;
}
// считываем и проверяем параметр cache_size:
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "cache_size"),
&c->cache_size);
if (!r) {
error_undefined(fn, buf);
goto full_cache_create_failed;
} else if (r < 0 || c->cache_size <= 0
|| c->cache_size > MAX_CACHE_SIZE
|| c->cache_size % c->block_size != 0)
{
error_invalid(fn, buf);
goto full_cache_create_failed;
}
// считываем и проверяем параметр cache_read_time:
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "cache_read_time"),
&c->cache_read_time);
if (!r) {
error_undefined(fn, buf);
goto full_cache_create_failed;
} else if (r < 0 || c->cache_read_time <= 0
|| c->cache_read_time > MAX_READ_TIME)
{
error_invalid(fn, buf);
goto full_cache_create_failed;
}
// считываем и проверяем параметр cache_write_time:
r = config_file_get_int(cfg,
make_param_name(buf, sizeof(buf), var_prefix, "cache_write_time"),
&c->cache_write_time);
if (!r) {
error_undefined(fn, buf);
goto full_cache_create_failed;
} else if (r < 0 || c->cache_write_time <= 0
|| c->cache_write_time > MAX_WRITE_TIME)
{
error_invalid(fn, buf);
goto full_cache_create_failed;
}
//выделяем блоки кэша:
c->block_count = c->cache_size / c->block_size;
c->blocks = calloc(c->block_count, sizeof(*c->blocks));
for (int i = 0; i < c->block_count; i++) {
c->blocks[i].addr = NO_BLOCK;
c->blocks[i].mem = calloc(c->block_size, sizeof(c->blocks[i].mem[0]));
}
return (AbstractMemory*) c;
full_cache_create_failed:
return full_cache_free((AbstractMemory*) c);
}