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gRPC server in kernel with eBPF; three times faster than go, two than Rust. Implemented minimum features just for benchmarking. eBPF (sockhash) gives hook for data arriving on TCP/UDP sockets, useful to implement server software? Or too restrictive? github.com/fujita/greeter…

For anyone thinking of doing a eBPF observability/tracing startup: this costs companies ~$52, has >100 open source tools, and was written by an expert with >15 yrs tracing experience & help from other BPF experts brendangregg.com/bpf-performanc…

Thanks Andrii Nakryiko for helping me improve this article！

E2fsprogs 1.46.0 is out: "[…] now supports the fast_commit […] which improves the latency of the fsync(2) system call […] now supports the stable_inodes […] both file system encryption and the casefold feature enabled […] lore.kernel.org/linux-ext4/YBm… #linux #kernel #ext4

Meet bperf: Sharing hardware PMCs with BPF. git.kernel.org/acme/c/7fac83a… 2nd use of BPF skels in perf, first one was to use BPF in perf to count events in BPF programs. Again, thanks to Song Liu! #perf_tools #bpf #linux

Prediction: exokernels era begins thanks to eBPF Interesting use of eBPF to reduce the access latency to NVMe (half of the overhead is due to the kernel storage path usually) 👇 arxiv.org/pdf/2102.12922…

I wrote an article about BPF and Linux perf 🎉 The article includes step-by-step debugging with flame graphs, and many nitty-gritty details that tie themselves together at the end (i promise!). #bpf #ebpf #linux doordash.engineering/2021/04/01/exa…

CFP for Networking & BPF Track for LPC 2021 is open! cilium.io/blog/2021/04/0…

Removing receive side bottlenecks in network performance with eBPF and CPUMAP...aka really ensuring flows are spread across cpus: developers.redhat.com/blog/2021/05/1…

New kernel post! This time: /proc/*/mem and how it writes to unwritable mem. Key takeaway: By walking page tables in software, the kernel can access userspace mem without directly dereferencing pointers it gets from userspace. (No WP/SMAP bits involved). offlinemark.com/2021/05/12/an-…

new blog post: What is Observability? brendangregg.com/blog/2021-05-2…

"Computer Performance: On the Horizon" is my plenary talk for USENIX #LISA21 next week, Jun 1-3 bit.ly/usenixlisa21 LISAConference

Having to deal with bpf_printk() recently for some fancier debug output I realized there are a bunch of interesting aspects worth sharing, especially taking into account various kernel versions. This resulted in nakryiko.com/posts/bpf-tips… Hope it will be helpful to someone.

Computing Performance: On the Horizon, USENIX Association #LISA21 video & slides are now online. The current state, and my predictions, for CPUs, memory, disks, and more. youtube.com/watch?v=5nN1wj… usenix.org/conference/lis…

BPF Internals, USENIX Association #LISA21 video & slides are now online. From bpftrace to machine code, showing how it all works. youtube.com/watch?v=_5Z2AU… usenix.org/conference/lis… #eBPF

eBPF Foundation announced. Founding members are Facebook, Google, Isovalent, Microsoft, Netflix. linuxfoundation.org/press-release/…

Compact NUMA-aware Locks talk starting in 15 mins: youtube.com/watch?v=b6jQnJ…

I am pleased to announce that our paper "An In-Kernel Solution Based on #XDP for #5G #UPF: Design, Prototype and Performance Evaluation" has been accepted 1st joint International Workshop on Network Programmability and Automation.

[$] Controlling the CPU scheduler with BPF lwn.net/Articles/87324…

New blog post introducing and demoing retsnoop, a powerful and ergonomic tool for debugging confusing kernel errors and learning kernel internals through tracing. nakryiko.com/posts/retsnoop… #linux #tracing