Performance Engineering & Scale Limits

All technical articles related to Performance Engineering & Scale Limits.

• Migrating tc classifiers to XDP with rollback discipline

  2 Jul, 2026

  Technical deep dive into Migrating tc classifiers to XDP with rollback discipline

• More NIC queues do not mean linear scaling

  27 Jun, 2026

  Technical deep dive into More NIC queues do not mean linear scaling

• Nested labs and the virtio single-queue cliff

  14 Jun, 2026

  Technical deep dive into Nested labs and the virtio single-queue cliff

• Tcpdump Cut the Ceiling in Half

  8 Jun, 2026

  Technical deep dive into Tcpdump Cut the Ceiling in Half

• Where VXLAN actually burns CPU in Linux labs

  29 May, 2026

  Technical deep dive into Where VXLAN actually burns CPU in Linux labs

• The lab says multi-queue, the host says not really

  19 May, 2026

  Technical deep dive into The lab says multi-queue, the host says not really

• Intended queue telemetry versus what the kernel exports

  16 May, 2026

  Technical deep dive into Intended queue telemetry versus what the kernel exports

• tc flower offload worked until it silently did not

  14 May, 2026

  Technical deep dive into tc flower offload worked until it silently did not

• One Packet Through Namespace, Bridge, Conntrack, NAT

  11 Apr, 2026

  Technical deep dive into One Packet Through Namespace, Bridge, Conntrack, NAT

• 64-byte PPS Is Not 1500-byte Throughput

  10 Apr, 2026

  Technical deep dive into 64-byte PPS Is Not 1500-byte Throughput