On 24 April 2015 at 03:01, Linhaifeng <haifeng.lin at huawei.com> wrote:
> If not add memory fence what would happen? Packets loss or interrupt > loss?How to test it ? > You should be able to test it like this: 1. Boot two Linux kernel (e.g. 3.13) guests. 2. Connect them via vhost switch. 3. Run continuous traffic between them (e.g. iperf). I would expect that within a reasonable timeframe (< 1 hour) one of the guests' network interfaces will hang indefinitely due to a missed interrupt. You won't be able to reproduce this using DPDK guests because they are not using the same interrupt suppression method. This is a serious real-world problem. I wouldn't deploy the vhost implementation without this fix. Cheers, -Luke
