* @param size Size of the data*
*/
RegionSnapshot region(
- RegionType type, void *start_addr, void* permanent_addr, size_t size)
+ RegionType type, void *start_addr, void* permanent_addr, size_t size,
+ RegionSnapshot const* ref_region)
{
if (_sg_mc_sparse_checkpoint) {
- return sparse_region(type, start_addr, permanent_addr, size);
+ return sparse_region(type, start_addr, permanent_addr, size, ref_region);
} else {
return dense_region(type, start_addr, permanent_addr, size);
}
}
RegionSnapshot sparse_region(RegionType region_type,
- void *start_addr, void* permanent_addr, size_t size)
+ void *start_addr, void* permanent_addr, size_t size,
+ RegionSnapshot const* ref_region)
{
simgrid::mc::Process* process = &mc_model_checker->process();
+ bool use_soft_dirty = _sg_mc_sparse_checkpoint && _sg_mc_soft_dirty
+ && ref_region != nullptr
+ && ref_region->storage_type() == simgrid::mc::StorageType::Chunked;
+
xbt_assert((((uintptr_t)start_addr) & (xbt_pagesize-1)) == 0,
"Not at the beginning of a page");
xbt_assert((((uintptr_t)permanent_addr) & (xbt_pagesize-1)) == 0,
"Not at the beginning of a page");
size_t page_count = mc_page_count(size);
- simgrid::mc::PerPageCopy page_data(mc_model_checker->page_store(), *process,
- permanent_addr, page_count);
+ std::vector<std::uint64_t> pagemap;
+ const size_t* ref_page_numbers = nullptr;
+ if (use_soft_dirty) {
+ pagemap.resize(page_count);
+ process->read_pagemap(pagemap.data(),
+ mc_page_number(nullptr, permanent_addr), page_count);
+ ref_page_numbers = ref_region->page_data().pagenos();
+ }
+
+ simgrid::mc::PerPageCopy page_data(
+ mc_model_checker->page_store(), *process, permanent_addr, page_count,
+ ref_page_numbers,
+ use_soft_dirty ? pagemap.data() : nullptr);
simgrid::mc::RegionSnapshot region(
region_type, start_addr, permanent_addr, size);
