zs_resource_total_uint64
tot_mem = zs_resource_total_uint64(u, ZS_RESOURCE_RAM_RSS);
tot_vm = zs_resource_total_uint64(u, ZS_RESOURCE_VM);
size = zs_resource_total_uint64(u, res);
uint64_t zs_resource_total_uint64(zs_usage_t *, int);