Intel Processor Trace

littleQ — Sun, 26 Jan 2025 15:31:18 GMT

I am trying to use intel-PT in vm.

When I run following command in host, the result is as follows:

echo -n "Intel PT support: "; if $(grep -q "intel_pt" /proc/cpuinfo); then echo ""; else echo ""; fi Intel PT support:

And when I trying to enable intel-pt in qemu-kvm vm, I got some error:

~/ccc-vm$ cat Makefile QEMU ?= qemu-system-x86_64 PORT ?= 2333 qemu_image := ubuntu-22.04-server-cloudimg-amd64.img qemu_args := \ -smp 16 -m 80G -accel kvm -nographic \ -machine q35,kernel_irqchip=split \ -cpu host,intel-pt,-kvm-asyncpf,-kvm-pv-eoi,-kvm-pv-ipi,-kvm-pv-sched-yield,-kvm-pv-unhalt,-kvm-steal-time,-kvmclock \ -drive file=$(qemu_image) \ -net user,id=net,hostfwd=tcp::$(PORT)-:22 -net nic,model=e1000e \ -serial mon:stdio \ $(qemu_image): wget https://cloud-images.ubuntu.com/releases/22.04/release/ubuntu-22.04-server-cloudimg-amd64.img .ONESHELL: image: $(qemu_image) cat >user-data <<EOF #cloud-config password: guest chpasswd: { expire: False } ssh_pwauth: True EOF cloud-localds user-data.img user-data qemu-img resize $(qemu_image) +64G sudo $(QEMU) $(qemu_args) -drive file=user-data.img,format=raw qemu: $(qemu_image) sudo $(QEMU) $(qemu_args) ~/ccc-vm$ make qemu qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]

what should I do?

Re: Intel Processor Trace

UmairWaris53 — Mon, 22 Jun 2026 17:03:52 GMT

Intel Processor Trace helps you see how a computer runs programs step by step. It records important actions so developers can find and fix problems easily. This makes software faster, safer, and more reliable.

topic Re: Intel Processor Trace in Software Tuning, Performance Optimization & Platform Monitoring

Intel Processor Trace

Re: Intel Processor Trace