In this post I will introduce a much more efficient method for accounting block I/O latencies with eBPF on Linux. In my stress test, the “new biolatency” accounting method had 59x lower CPU and probe latency overhead compared to the current biolatency approach. So I couldn’t help it and ended up putting 21 NVMe SSDs into one of my homelab servers. 8 of them are PCIe5 and the remaining 13 are PCIe4. - Linux, Oracle, SQL performance tuning and troubleshooting - consulting & training.
