static double ssd_clean_block_fully(int plane_num, int elem_num, ssd_t *s)
{
int blk;
double cost = 0;
double mcost = 0;
ssd_element_metadata *metadata = &s->elements[elem_num].metadata;
plane_metadata *pm = &metadata->plane_meta[plane_num];
ASSERT((pm->clean_in_progress == 0) && (pm->clean_in_block = -1));
blk = ssd_pick_block_to_clean(plane_num, elem_num, &mcost, metadata, s);
ASSERT(metadata->block_usage[blk].plane_num == plane_num);
cost = _ssd_clean_block_fully(blk, plane_num, elem_num, metadata, s);
return (cost+mcost);
}
double ssd_clean_block_partially(int plane_num, int elem_num, ssd_t *s)
{
ssd_element_metadata *metadata = &(s->elements[elem_num].metadata);
plane_metadata *pm = &metadata->plane_meta[plane_num];
double cost = 0;
double mcost = 0;
// see if we've already started the cleaning
if (!pm->clean_in_progress) {
// pick a block to be cleaned
pm->clean_in_block = ssd_pick_block_to_clean(plane_num, elem_num, &mcost, metadata, s);
pm->clean_in_progress = 1;
}
// yes, the cleaning on this plane is already initiated
ASSERT(pm->clean_in_block != -1);
cost = _ssd_clean_block_partially(plane_num, elem_num, s);
return (cost+mcost);
}
double ssd_clean_element(ssd_t *s, int elem_num)
{
ssd_element_metadata *metadata;
double cost = 0;
int lbn;
int reserved = s->params.reserve_blocks * s->params.blocks_per_element * 0.01;
int low_thresold = reserved * 0.9;
metadata = &(s->elements[elem_num].metadata);
/*if (!ssd_start_cleaning(-1, elem_num, s)) {
if(metadata->num_log >= reserved){
cost = ssd_merge(s, elem_num, lbn);
}
return cost;
}*/
while (metadata->num_log > low_thresold) {
lbn = ssd_pick_block_to_clean(-1, elem_num, metadata, s);
cost += ssd_merge(s, elem_num, lbn);
//return cost;
}
return cost;
}