void
Cache :: line_evict(Line *line)
{
NVLOG1("%s\tline_evict addr 0x%lx data 0x%lx\n", this->_name.c_str(), line->addr, (Addr)line->pdata);
// evict in all child caches
for (size_t child_i = 0; child_i<_children.size() && line->sharers>0; child_i++) {
if (!bit(line->sharers, child_i)) continue; // a child is not a sharer, so continue
Cache *child = dynamic_cast<Cache *>(_children[child_i]); assert(child!=NULL);
for (Addr line_addr_iter=line->addr; line_addr_iter<line->addr+get_line_size(); line_addr_iter += child->get_line_size()) {
Line *child_line = child->addr2line_internal(line_addr_iter);
if (child_line == NULL) continue;
child->line_evict(child_line);
}
}
#ifdef HAS_HTM
if (pprocessor) {
pprocessor->cb_line_evicted(line);
}
#endif
if (!_parent_cache) {
// notify the processor of the line removal
#ifdef HAS_HTM
assert(pprocessor);
pprocessor->cb_line_evicted(line);
#endif
}
this->line_data_writeback(line); // check if there is any data to writeback
free(line->pdata);
line->pdata = NULL;
// remove in this cache as well
this->line_rm(line);
}
bool
Cache :: line_make_owner_in_child_caches(Line *line, unsigned child_index)
{
NVLOG1("%s\tline_make_owner_in_child_caches 0x%lx sharers %lx caller %d\n", this->_name.c_str(), line->addr, line->sharers, child_index);
uint8_t __attribute__((unused)) line_state_orig = line->state;
uint64_t __attribute__((unused)) line_sharers_orig = line->sharers;
// evict the line in all but the requesting child cache
for (size_t child_i = 0; child_i<_children.size() && line->sharers>0; child_i++) {
Cache *child = dynamic_cast<Cache *>(_children[child_i]); assert(child!=NULL);
// NVLOG1("%s\tchecking for 0x%lx %lx 1\n", child->_name.c_str(), line->addr, line->sharers);
if (!bit(line->sharers, child_i)) continue; // a child is not a sharer, so continue
// NVLOG1("%s\tchecking for 0x%lx %lx 2\n", child->_name.c_str(), line->addr, line->sharers);
if (child_i == child_index) continue; // skip the child cache that called us
// NVLOG1("%s\tchecking for 0x%lx %lx 3\n", child->_name.c_str(), line->addr, line->sharers);
for (Addr line_addr_iter=line->addr; line_addr_iter<line->addr+get_line_size(); line_addr_iter += child->get_line_size())
{
NVLOG1("%s\tis line sharer, checking segment 0x%lx\n", child->_name.c_str(), line_addr_iter);
Line *child_line = child->addr2line_internal(line_addr_iter);
if (!child_line) continue;
NVLOG1("%s\thas segment 0x%lx, evicting\n", child->_name.c_str(), line_addr_iter);
child->line_evict(child_line);
}
}
line->sharers = 0;
setbit(line->sharers, child_index);
NVLOG1("%s\tline 0x%lx\t state %s->%s sharers 0x%lx->0x%lx\n", _name.c_str(), line->addr, state2str(line_state_orig).c_str(), state2str(line->state).c_str(), line_sharers_orig, line->sharers);
return true;
}
