#include <cstdlib>
#include <sys/mman.h>
+#ifdef __FreeBSD__
+# define MAP_POPULATE MAP_PREFAULT_READ
+#endif
#include "mc/mc.h"
#include "src/mc/mc_snapshot.h"
void *start_addr, void* permanent_addr, size_t size)
{
// When KSM support is enables, we allocate memory using mmap:
- // * we don't want to madvise bits of the heap;
+ // * we don't want to advise bits of the heap as mergable;
// * mmap gives data aligned on page boundaries which is merge friendly.
simgrid::mc::Buffer data;
if (_sg_mc_ksm)
remote(permanent_addr),
simgrid::mc::ProcessIndexDisabled);
+#ifdef __linux__
if (_sg_mc_ksm)
// Mark the region as mergeable *after* we have written into it.
// Trying to merge them before is useless/counterproductive.
madvise(data.get(), size, MADV_MERGEABLE);
+#endif
simgrid::mc::RegionSnapshot region(
region_type, start_addr, permanent_addr, size);
region.page_data(std::move(page_data));
return region;
}
-
+
}
}