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, Valkey, Redis, bcc, atop, rdma-core.
- I developed Valkey over RDMA, and the new feature has been merged into Valkey 8.0. This allows clients to communicate with the Valkey server via RDMA, potentially improving the QPS by approximately 250% and reducing latency by around 50%. I am also working on Valkey/Redis for vLLM Splitwise and remote KV cache.
- I developed the virtio crypto kernel driver and the QEMU backend. These developments allow guests to offload RSA/ECDSA to the hosts. It's possible to let nginx (with openssl) improve the performance of HTTPS to ~200%. I have been maintaining the cryptodev subsystem of QEMU since March 2023.
- I contributed lots of patches to atop. I also developed atophttpd, which is a web-style atop. This allows users to access atop without logging in. It's also possible to get the system-level/process-level status of many servers in batch.
- I wrote the
irqtop/lsirq/blkprcommands (from util-linux). Any suggestion/feedback is welcome! - I wrote the
hugetopcommand (from procps). Any suggestion/feedback is welcome! - I wrote the
tcprtt/virtiostat/rdmaucmacommands and improved therunqslower/killsnoop/trace/funccountcommands (from bcc). Any suggestion/feedback is welcome! - I'm familiar with iSCSI/iSER/NVMe-oF, contributed patches to libiscsi/spdk/tgt/kernel nvme target, and I also developed a user-space NVMe-oF initiator libnvmf which makes QEMU block as fast as ~200K IOPS.
- I have worked on the Virtio Over Fabrics specification, Linux driver demonstration code, and the Virtio-oF target. This work has stalled due to the unavailability of the Virtio-Spec maintainers.
- 📫 Contact me at pizhenwei@bytedance.com