[ovs-discuss] upcall first or the next packet first?

[杨润垲]

I'm sorry I did not make it clear.
If a new packet arrive, the rx ssr will occupy the cpu and the process in userspace has to stop, will it? So the thread which in userspace only can be processed when there is no new packet arrival, am I　right?  thank you very much!

在2017-02-07 13:21:04，杨润垲16125201 at bjtu.edu.cn写道：

What's your mean?


I think packets not belongs to one flow has no relationship, who send first depands on nothing.


rx-softinterrupt is used for driver to receive packets, ovs will not interrupt by rx-softinterrupt. I think, I don't know.


2017-02-07 9:07 GMT+08:00 杨润垲 <16125201 at bjtu.edu.cn>:
thank you for your reply!
If there is only one CPU in the system, then the packets in userspace will not be processed until no new packets arrive，will it ? Because the rx-softinterrupt will always interrupt the process in userspace to work.Is this reasonable?    Thanks again!


在2017-02-07 00:38:13,杨润垲<16125201 at bjtu.edu.cn>写道：
> On Mon, Feb 06, 2017 at 05:13:45PM +0800, 杨润垲 wrote:
> > Dear predecessors, I have a problem. If ovs receives two packets, the
> > first one is not in the flow table, and the second one is in the flow
> > table, then the kernel will send the first packet of information to
> > the userspace. Does the userspace feedback then process the first
> > packet, or it wait for the second packet to be processed directly?I'm
> > looking forward to your reply.
>
> The second packet will be processed without waiting for the first one.


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