On Thursday, July 8, 2021 12:45 AM, Peter Xu wrote: > On Wed, Jul 07, 2021 at 12:45:32PM +0000, Wang, Wei W wrote: > > Btw, what would you think if we change mutex to QemuSpin? It will also > > reduce > the overhead, I think. > > As I replied at the other place, the bottleneck we encountered is the lock > taking > not sleeping, so I'm afraid spinlock will have the same issue. Thanks,
I suspect the overhead you observed might be caused by the syscalls for mutex. Per-page syscall might be too much. If possible, you could have another test of the 3GB guest migration using QemuSpin. Best, Wei
