Yiwei Yang (VickieGPT)

Biography

I'm a third-year Computer Science System Ph.D. student @BaskinEng. I'm honored to be advised by Andi Quinn, and hacking on cutting-edge HW/SW co-design. The goal of my research is to accelerate data access and manipulation on modern heterogeneous architecture and general-purpose processors for diverse workloads across companies utilizing CXL and UCIe technology. I believe in a hardware-software co-design methodology. The hardware provides specialized acceleration capabilities for common cases without sacrificing heterogeneous processing performance with a better knowledge of workloads, while the software adaptively takes advantage of the hardware by sending semantic hints, and falls back to alternative, slower paths whenever hardware acceleration is not achievable. Assured with my great passion for seeking new knowledge and commercial opportunity and situated in two metropolitans, the San Fransisco Bay area, and Shanghai, I'm proud to learn more, benefit others more, and earn more. Previously, I was an undergraduate @ShanghaiTech.
fn research_no_failure()->Result < Paper, Error > {
    let output = if cfg!(target_os = "linux") {
        Command::new("qemu-x86_64-system")
        .args(["-smp 6", "-numa node,cpus=0-7,memdev=mem0,nodeid=0", "-object memory-backend-ram,id=mem0,size=8G","-numa node,cpus=8-15,memdev=mem1,nodeid=1", "-object memory-backend-ram,id=mem1,size=8G","-m 16G,slots=4,maxmem=32G", "-machine q35,cxl=on", "-M cxl-fmw.0.targets.0=cxl.1,cxl-fmw.0.size=4G",
             "-device pxb-cxl,bus_nr=12,bus=pcie.0,id=cxl3.1", "-device cxl-rp,port=0,bus=cxl.1,id=root_port13,chassis=0,slot=2",
             "-device cxl-type3,bus=root_port13,memdev=cxl-mem1,lsa=cxl-lsa1,id=cxl-mem0",
             "-device cxl-type2,bus=root_port14,virtio-gpu-cxl,id=gpu0,gpudev=gpudev0"])
             "-device cxl-type1,bus=root_port15,virtio-crypto-cxl,id=crypto0,cryptodev=cryptodev0"])
            .output()
            .expect("failed to execute process")
    }
    let paper = Paper::new(output);
    loop{
        asm!("clflush" :: "r" (&paper.iter()) : "rax", "rbx", "rcx", "rdx": "volatile" );
        __atomic_thread_fence(__ATOMIC_SEQ_CST);
        if (paper.is_valid()){
            break;
        }
    }
    Ok(paper)
}

Skills

Current Research

Research Assistant
August 2022 - Present
  • Understanding the performance characteristics of CXL.mem systems. Data-driven far memory allocation, prefetching, and replacement policies. Emulating memory disaggregation for data center applications
  • Make Hardware Software Co-design for on CXL.cache data movement
  • Make universal migration based on WebAssembly and PTX
  • Make cross kernel-userspace eBPF observation for distributed system

Advising Experience

Kiki Zhang SDE->SCU Ph.D. in HCI

Zheng Cao@eunomia-bpf NYU B.S.->UCM Ph.D. in System

Publications

HetGPU: The pursuit of making binary compatibility towards GPUs                           

CXLMemUring: A Hardware Software Co-design Paradigm for Asynchronous and Flexible Parallel CXL Memory Pool Access

Transparent and Efficient Live Migration across Heterogeneous Hosts with Wharf

eInfer: Unlocking Fine-Grained Tracing for Distributed LLM Inference with eBPF

ChainIO: Bridging Disk and Network Domains with eBPF                           

Offloading the Tedious Task of Writing eBPF Programs                           

Extending Applications Safely and Efficiently (bpftime: userspace eBPF Runtime for Uprobe, Syscall and Kernel-User Interactions)

wBPF: Efficient Edge-Case Observability for CXL Pooling systems via eBPF                                                                        

eGPU: Extending eBPF Programmability and Observability to GPUs                                                                        

Kgent: Kernel Extensions Large Language Model Agent (KEN: Kernel Extensions using Natural Language)

CXLMemSim: A pure software simulated CXL.mem for performance characterization

Attack as Defense: Characterizing Adversarial Examples using Robustness

Teaching Assistant

ShanghaiTech CS131: Compiler

UCSC CSE12: Computer Systems and Assembly Language