公开(公告)号：US20250156353A1

公开(公告)日：2025-05-15

申请号：US18592026

申请日：2024-02-29

Applicant: Microsoft Technology Licensing, LLC

Inventor： Ming JIN ,  Vadim MAKHERVAKS ,  Ji DAI ,  Tengda YAN ,  Yuan YI ,  Chuanjun YIN ,  Scott Chao-Chueh LEE

IPC: G06F13/26 ,  G06F13/22

Abstract: A system and method for using a semi-polling model to monitor a Non-Volatile Memory Express (NVMe) completion queue (CQ). The method, implemented at an interrupt thread, includes receiving an input/output (I/O) request from an application and submitting a submission queue (SQ) entry into an NVMe SQ in response to the I/O request. The method further includes registering for notifications from a polling thread after submitting the SQ entry and receiving, from the polling thread, a notification of the presence of a CQ entry within an NVMe CQ. Additionally, the method involves removing the CQ entry from the NVMe CQ and notifying the application of completion of the I/O request.

公开(公告)号：US20250156360A1

公开(公告)日：2025-05-15

申请号：US18592046

申请日：2024-02-29

Applicant: Microsoft Technology Licensing, LLC

Inventor： Ming JIN ,  Vadim MAKHERVAKS ,  Ji DAI ,  Tengda YAN ,  Yuan YI ,  Chuanjun YIN ,  Scott Chao-Chueh LEE

IPC: G06F13/40 ,  G06F13/16

Abstract: Systems and methods are disclosed for implementing a Non-Volatile Memory Express (NVMe) driver in a computer system. The method involves mapping a memory buffer into a user mode address space to facilitate data transfer with an NVMe device via direct memory access (DMA). Additionally, a first NVMe queue pair, including a submission queue (SQ) and a completion queue (CQ), is mapped into the user mode address space, allowing a user mode component to submit commands to the NVMe device. The method further enables the user mode component to ring a doorbell at the NVMe device. Finally, an NVMe command is processed in kernel mode using a second NVMe queue pair comprising a second SQ and a second CQ.