Dexuan Cui
Principal Software Engineer at Microsoft
Redmond, Washington, United States
Summary
👤
Senior🎓
Top SchoolDexuan Cui is a Principal Software Engineer based in Redmond with over a decade of deep systems and virtualization experience, currently advancing para-virtualized drivers and enabling Confidential VMs for Linux on Hyper-V and Azure. His career includes formative work on Xen/KVM and Intel virtualization features (VT-x/VT-d, SR-IOV) and leading guest-side integration (LIS/BIS) that improved network, storage and device passthrough for Linux and FreeBSD. He has hands-on expertise delivering near-native GPU and PCIe passthrough solutions (XenGT, FreeBSD SR-IOV) and has driven practical enhancements like Hyper-V Sockets, hibernation support and VF NIC drivers. An active contributor to platform tooling, he extended ndctl to report health for Hyper-V virtual NVDIMMs, showing a knack for bridging low-level firmware/device details with cloud-scale needs. Colleagues know him for cross-geo collaboration with OS vendors and for technical presentations to the BSD community, combining deep firmware knowledge with production cloud engineering.
11 years of coding experience
15 years of employment as a software developer
Bachelor's degree Computer Science and Technology, Bachelor's degree Computer Science and Technology at Wuhan UniversityMaster's degree Computer Software and Theory, Master's degree Computer Software and Theory at Huazhong University of Science and Technology
Github Skills (14)
c1710
kernel10
nvm10
embedded10
driver10
device-driver10
c1110
system-programming10
internals10
sys10
linux-kernel10
hyper-v10
x868
x86-648
Programming languages (8)
Github contributions (5)
pmem/ndctl
Mar 2019 - Mar 2019
A "device memory" enabling project encompassing tools and libraries for CXL, NVDIMMs, DAX, memory tiering and other platform memory device topics.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits in 1 day
Contributions summary:Dexuan's contributions primarily focus on extending the `ndctl` library to support Hyper-V virtual NVDIMMs. They implemented the "smart_get_health" and "smart_get_shutdown_count" dimm-ops to retrieve health and shutdown information for these devices. These additions enable the "ndctl monitor" utility to provide meaningful health status updates for Hyper-V based NVDIMMs. The code changes include modifications to `hyperv.c`, `hyperv.h`, `libndctl.c`, and `ndctl.h` and adding the `cmd_is_supported` function.
memorydaxlinux-kerneltieringcxl
dcui/lis-next
Apr 2015 - May 2019
Contributions:25 pushes, 21 branches in 4 years 1 month
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