Taming the FFmpeg Stampede: Writing a Custom eBPF Scheduler with Linux 6.12 sched_ext
Have you ever launched 20–30 concurrent ffmpeg encoding jobs on a beefy multi-core server, only to watch the entire system grind to a halt? Even on…
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Kubernetes: iptables is empty after migrating to Cilium — what to look at next
A Kubernetes Service stops responding. The first move is always the same: get on the node and run iptables-save | grep KUBE-SERVICES to see which Po…
Кэши, режимы нагрузки и ловушка среднего, или Почему storage-бенчмарки врут
Представьте, разработчики добавили прозрачное шифрование в файловую систему, собрали ядро и прогнали Fio — пропускная способность не изменилась. Одн…
I Replaced kube-proxy with eBPF in Production (And Why My Monitoring Went Blind for 6 Hours)
I Replaced kube-proxy with eBPF in Production (And Why My Monitoring Went Blind for 6 Hours) From a "simple" Cilium upgrade to a 6-hour outage where…
A Differential Test Harness for Native vs. Generic XDP: Methodology and Baseline
Native XDP and generic SKB-mode XDP are not the same thing in practice. The same BPF program can pass the verifier and still behave differently depe…
GPU Incident at 3am: eBPF Tracing from Page to Root Cause in 60 Seconds
TL;DR 3am page: GPU training pipeline missed its SLA. Datadog shows 95% GPU utilization. nvidia-smi agrees. Everything looks green, but the job is 3…