support parallel execution in stress utility
support parallel execution in stress utility

dotweiba/syzkaller,dotweiba/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,sploving/syzkaller,lorenzo-stoakes/syzkaller,google/syzkaller,sploving/syzkaller,google/syzkaller,dotweiba/syzkaller,sploving/syzkaller,hyz0906/syzkaller,sploving/syzkaller,xairy/syzkaller,zoulasc/syzkaller,hyz0906/syzkaller,xairy/syzkaller,hyz0906/syzkaller,zoulasc/syzkaller,zoulasc/syzkaller,google/syzkaller,hyz0906/syzkaller,zoulasc/syzkaller,lorenzo-stoakes/syzkaller,xairy/syzkaller,google/syzkaller,lorenzo-stoakes/syzkaller,google/syzkaller,hyz0906/syzkaller,dotweiba/syzkaller