| Metric | QBT 3.0 | QBT 4.0 | Improvement | |--------|---------|---------|--------------| | Cold boot (x86_64, UEFI to Linux shell) | 12.1 sec | 11.3 sec | +7% | | Snapshot restore (on failure) | 4.2 sec | 0.44 sec | | | Memory usage per instance (idle) | 380 MB | 210 MB | -45% | | Parallel 10x ARMv8 boot | 89 sec | 34 sec | +162% | | TPM PCR capture overhead | N/A | 0.15 sec | New feature |
If a firmware update causes the boot time to change by 200ms or reorders two identical log lines, 4.0 flags it as a regression. This has caught subtle ACPI table ordering bugs in EDK II that previously escaped manual review. qemu boot tester 4.0
The version 4.0 ecosystem brings several enhancements to the boot testing process, focusing on compatibility and ease of use: | Metric | QBT 3
I can provide a step-by-step guide for your specific scenario. Before we explore version 4
Before we explore version 4.0, let’s establish a baseline. QEMU Boot Tester (QBT) is an open-source automation tool that orchestrates QEMU instances to test boot sequences without human intervention. Unlike generic QEMU wrappers (like libvirt or simple bash scripts), QBT is . It understands boot phases: reset vector, pre-EFI initialization, bootloader handoff, kernel decompression, and userspace pivot.
Stop wasting time restarting your PC just to check if your bootable USB works. QEMU Boot Tester
The you are currently using (e.g., Windows 10, Windows 11).