2014-06-23 0:32 GMT-04:00 Venkateswara Rao Nandigam <venkateswararao.nandi...@citrix.com>: > It depends on Guest driver. If you look at virtio, the present guest drivers > are implemented this way, I presume there cannot be a better way > functionally. But if someone wants to reduce these notifications, they can do > it in their Guest driver. There were some generic attempts like "TX Interrupt > Moderation" and "polling mode" in virtio driver.
It is interesting. Are there similar ways in RX path? > > I have reduced notifications in my own implementation, but that’s specific to > my Guest. I am interested in the reduced notification mechanism. Would you mind sharing your implementation? Thanks. Regards, Cong > > Thanks, > Venkatesh > > -----Original Message----- > From: David Xu [mailto:davidx...@gmail.com] > Sent: Monday, June 23, 2014 8:43 AM > To: Venkateswara Rao Nandigam > Cc: kvm > Subject: Re: vhost notification model > > 2014-06-22 22:57 GMT-04:00 Venkateswara Rao Nandigam > <venkateswararao.nandi...@citrix.com>: >> There are individual notifications for each packet/buffer on the both Rx and >> Tx. > > So, it means there is no coalescing mechanism for Rx/Tx notification > currently. Each request/response (Rx/Tx) will trigger a VM exit/entry. > Right? > > Regards, > Cong > >> >> -----Original Message----- >> From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On >> Behalf Of David Xu >> Sent: Sunday, June 22, 2014 11:55 PM >> To: kvm >> Subject: vhost notification model >> >> Hi All, >> >> When vhost receive packets, does it notify target VM for each request or a >> bunch of requests? How about the tx path? When one VM send packets, does the >> VM trap to privilege mode via VM exit and kick vhost for each packet or >> buffer several packets then trap and kick once? >> Thanks. >> >> Regards, >> Cong >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in the >> body of a message to majord...@vger.kernel.org More majordomo info at >> http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
