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:
Oct. 16, 2012
Filed:
Jan. 15, 2010
Guest/hypervisor interrupt coalescing for storage adapter virtual function in guest passthrough mode
Hariharan Subramanian, Wakefield, MA (US);
Edward J. Goggin, Concord, MA (US);
Vibhor Patale, Bangalore, IN (US);
Rupesh Bajaj, Madhya Pradesh, IN;
Hariharan Subramanian, Wakefield, MA (US);
Edward J. Goggin, Concord, MA (US);
Vibhor Patale, Bangalore, IN (US);
Rupesh Bajaj, Madhya Pradesh, IN;
VMware, Inc., Palo Alto, CA (US);
Abstract
A system and method are provided that involve a host computing machine and an SR IOV storage adapter in which the host machine hosts a virtual machine having a guest operating system (guest) coupled for direct passthrough IOV data path and also hosts a virtualization intermediary; a guest operating system (guest) and a virtualization intermediary exchange information concerning IO completions through a shared memory space; the guest writes information to a shared memory space that is indicative of whether an IO completion queue has reached a fill level since the most recently dispatched interrupt at which it is unsafe to coalesce an interrupt; the virtualization intermediary writes information to the shared memory space that is indicative of the interrupt most recently delivered to the guest; the virtualization intermediary reads the information written by the guest to the shared memory space that is indicative of whether an IO completion queue has reached a fill level since the most recently dispatched interrupt at which it is unsafe to coalesce an interrupt; the guest reads the information written to the shared memory space that is indicative of the interrupt most recently delivered to the guest; virtual interrupt coalescing determinations are made based upon the information shred through the shared memory space.