I am seeing funny results

I am seeing funny results

Steven Thomsen (Intel)的头像

When attempting to run a network benchmark from within a VM, I am seeing throughput of approximately 14 GBytes/sec which go through a physical NIC rated at 1 GBit/sec. This seems to be a funny result. Also, my system clock is constantly incorrect and falling behind real time.

2 帖子 / 0 全新
最新文章
如需更全面地了解编译器优化,请参阅优化注意事项
Steven Thomsen (Intel)的头像

This is because of "time drift". Essentially, the VMM sends clock ticks to the VM. If the VM does not respond quick enough, the tick is lost, which means the system time falls behind. Everything else keeps runniing, so all of your performance numbers are invalid. Using NTP can greatly help with this problem.

登陆并发表评论。