Posts on sgarzare's blog

A missing piece for AF_VSOCK in the Linux kernel has been network namespace support.

A vDPA device is a type of device that follows the virtio specification for its datapath but has a vendor-specific control path. vDPA devices can be both physically located on the hardware or emulated by software.

SOCAT is a CLI utility which enables the concatenation of two sockets together.

During the last KVM Forum 2019, we discussed some next steps and several requests came from the audience.

In order to save memory and boot time, QEMU 4.2 and later versions are able to mmap(2) the kernel and initrd specified with -kernel and -initrd parameters.

Slides and recording are available for the “virtio-vsock in QEMU, Firecracker and Linux: Status, Performance and Challenges” talk that Andra Paraschiv and I presented at KVM Forum 2019.

The stefano-garzarella/qemu-boot-time repository contains a Python perf-script and (Linux, QEMU, SeaBIOS) patches to measure the boot time of a Linux VM with QEMU/KVM.

QEMU 4.0 is now able to boot directly into the uncompressed Linux x86_64 kernel binary with minimal firmware involvement using the PVH entry point defined in the x86/HVM direct boot ABI.

The iperf-vsock repository contains few patches to add the support of VSOCK address family to iperf3.