[Bug 1826401] Re: qemu-system-aarch64 has a high cpu usage on windows

[Thomas Huth]

Looking through old bug tickets... is this still an issue with the latest 
version of QEMU? Or could we close this ticket nowadays?
Also, what guest operating systems were you running ?

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1826401

Title:
  qemu-system-aarch64 has a high cpu usage on windows

Status in QEMU:
  Incomplete

Bug description:
  Running qemu-system-aarch64 leads to a high CPU consumption on windows
  10.

  Tested with qemu: 4.0.0-rc4 & 3.1.0 & 2.11.0

  Command: qemu_start_command = [
          qemu-system-aarch64,
          "-pidfile",
          target_path + "/qemu" + str(instance) + ".pid",
          "-machine",
          "virt",
          "-cpu",
          "cortex-a57",
          "-nographic",
          "-smp",
          "2",
          "-m",
          "2048",
          "-kernel",
          kernel_path,
          "--append",
          "console=ttyAMA0 root=/dev/vda2 rw ipx=" + qemu_instance_ip + "/64 
net.ifnames=0 biosdevname=0",
          "-drive",
          "file=" + qemu_instance_img_path + ",if=none,id=blk",
          "-device",
          "virtio-blk-device,drive=blk",
          "-netdev",
          "socket,id=mynet0,udp=127.0.0.1:2000,localaddr=127.0.0.1:" + 
qemu_instance_port,
          "-device",
          "virtio-net-device,netdev=mynet0",
          "-serial",
          "file:" + target_path + "/qemu" + str(instance) + ".log"
      ]

  *The cpu consumption is ~70%.
  *No acceleration used.
  *This CPU consumption is obtained only by running the above command. No 
workload on the guest OS.

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