The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2020
Filed:
May. 09, 2017
Cavium, Llc, Santa Clara, CA (US);
Manojkumar Panicker, Sunnyvale, CA (US);
Marvell Asia Pte, Ltd., Singapore, SG;
Abstract
A new approach is proposed that contemplates systems and methods to support virtio-based data packet path optimization for live virtual machine (VM) migration for Linux. Specifically, a data packet receiving (Rx) path and a data packet transmitting (Tx) path between a VM running on a host and a virtual function (VF) driver configured to interact with a physical network device of the host to receive and transmit communications dedicated to the VM are both optimized to implement a zero-copy solution to reduce overheads in packet processing. Under the proposed approach, the data packet Tx path utilizes a zero-copy mechanism provided by Linux kernel to avoid copying from virtio memory rings/Tx vrings in memory of the VM. The data packet Rx path also implements a zero-copy solution, which allows a virtio device of the VM to communicate directly with the VF driver of the network device while bypassing a macvtap driver entirely from the data packet Rx path.