pizhenwei Goto Github PK

followers: 160.0 following: 0.0 repos: 42.0 gists: 0.0

Name: zhenwei pi

Type: User

Company: ByteDance

Bio: 皮振伟。云计算技术系统研究。个人微信公众号AlwaysGeek。

Location: Beijing

Hi, I’m @pizhenwei

👀 I’m interested in the Linux operating system and lots of software. I've contributed to Linux, util-linux, QEMU, libvirt, libiscsi, spdk,tgt, Redis, bcc, atop.

I’m currently working on Virtio Over Fabrics specification, Linux driver demonstration code and Virtio-oF target.
I developed Valkey over RDMA, the new feature has been merged into Valkey 8.0. This allows clients to communicate with Valkey server by RDMA, it's possible to improve the QPS to ~250%. and reduce latency to ~50%.
I developed virtio crypto kernel driver and QEMU backend, this allows guest to offload RSA/ECDSA to host. It's possible to let nginx(with openssl) improve the performance of HTTPS to ~200%. I started to maintain the cryptodev subsystem of QEMU since 2023-03.
I contributed lots of patches to atop, and recently I'm developing atophttpd which is a web style atop, this allows to access atop without login, it's also possible to get system level/process level status of many servers in batch.
I wrote irqtop/lsirq/blkpr commands(from util-linux), any suggestion/feedback is welcome!
I wrote hugetop command(from procps), any suggestion/feedback is welcome!
I wrote tcprtt/virtiostat/rdmaucma commands, improved runqslower/killsnoop/trace/funccount commands(from bcc), any suggestion/feedback is welcome!
I'm familiar with iSCSI/iSER/NVMe-OF, contributed patches to libiscsi/spdk/tgt/kernel nvme target, I also developed a user space NVMe-oF initiator libnvmf which makes QEMU block as faster as ~200K IOPS.
📫 Contact me by [email protected]

zhenwei pi's Projects

atophttpd

A web style atop(https://www.atoptool.nl/)

bcc

BCC - Tools for BPF-based Linux IO analysis, networking, monitoring, and more

cpuid

A simple CPUID decoder/dumper for x86/x86_64

irq-util-linux-for-debian

Build a deb package includes irqtop & lsirq

irqbalance

The irqbalance source tree - The new official site for irqbalance

irqtop

A top-like utility to monitor kernel interrupt information.(irqtop has been merged into util-linux v2.36, This project is no longer maintained)

procfs

procfs provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc.

pyflame

🔥 Pyflame: A Ptracing Profiler For Python

qemu

Official QEMU mirror. Please see http://wiki.qemu.org/Contribute/SubmitAPatch for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website.

rdma-core

RDMA core userspace libraries and daemons

Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes, Streams, HyperLogLogs, Bitmaps.