On 2018/10/15 10:33, Jason Wang wrote:
>
>
> On 2018年10月15日 09:43, jiangyiwen wrote:
>> Hi Stefan & All:
>>
>> Now I find vhost-vsock has two performance problems even if it
>> is not designed for performance.
>>
>> First, I think vhost-vsock should faster than vhost-net because it
>> is no TCP/IP stack, but the real test result vhost-net is 5~10
>> times than vhost-vsock, currently I am looking for the reason.
>
> TCP/IP is not a must for vhost-net.
>
> How do you test and compare the performance?
>
> Thanks
>
I test the performance used my test tool, like follows:
Server Client
socket()
bind()
listen()
socket(AF_VSOCK) or socket(AF_INET)
Accept() <-------------->connect()
*======Start Record Time======*
Call syscall sendfile()
Recv()
Send end
Receive end
Send(file_size)
Recv(file_size)
*======End Record Time======*
The test result, vhost-vsock is about 500MB/s, and vhost-net is about 2500MB/s.
By the way, vhost-net use single queue.
Thanks.
>> Second, vhost-vsock only supports two vqs(tx and rx), that means
>> if multiple sockets in the guest will use the same vq to transmit
>> the message and get the response. So if there are multiple applications
>> in the guest, we should support "Multiqueue" feature for Virtio-vsock.
>>
>> Stefan, have you encountered these problems?
>>
>> Thanks,
>> Yiwen.
>>
>
>
> .
>
