Quantum Mechanics demystified, a try
Documenting events, issues, incidents and such with Android Studio and Kotlin along the way
Android AVD performance is getting worse and worse. Top is now showing 200% cpu usage for itmost of the time. Below some actions, after which cpu usage dropped to 50%
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/config.ini:
hw.audioInput = no # 20241129 VN: was yes
hw.audioOutput = no # 20241129 VN: add this
hw.gps = no # 020241129 VN: was yes
AndroidStudio - Device Manager -
may help if there is a total hang
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$ ls -l ~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/*.lock
-rw-rw-r-- 1 pappa pappa 0 marras 29 10:16 /home/pappa/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/multiinstance.lock
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$ rm ~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/*.lock
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$ ls -l ~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/*.qc*
-rw-r--r-- 1 pappa pappa 209453056 marras 29 10:20 /home/pappa/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/cache.img.qcow2
-rw-r--r-- 1 pappa pappa 2097221 marras 29 10:20 /home/pappa/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/encryptionkey.img.qcow2
-rw-r--r-- 1 pappa pappa 720965 marras 29 10:20 /home/pappa/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/sdcard.img.qcow2
-rw-r--r-- 1 pappa pappa 1187971072 marras 29 10:20 /home/pappa/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/userdata-qemu.img.qcow2
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$ rm ~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/*.qco*
AndroidStudio - device manager - edit with pencil symbol - Emulated performace Graphics: from auto to hardware GLES 2.0
This was crucial. Gave most of the performance improvement.
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$ sudo kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$ ps aux | grep qemu-system-x86_64
pappa 42366 174 13.1 4589800 2123060 ? Sl 11:38 2:19 /home/pappa/Android/Sdk/emulator/qemu/linux-x86_64/qemu-system-x86_64 -netdelay none -netspeed full -no-snapshot-load -avd 5inchphode64bitemu_API_Tiramisu -qt-hide-window -grpc-use-token -idle-grpc-timeout 300
pappa 42699 0.0 0.0 11580 656 pts/0 S+ 11:39 0:00 grep --color=auto qemu-system-x86_64
pappa@pappa-ThinkPad-X270:~/.android/avd/5inchphode64bitemu_API_Tiramisu.avd$
sudo apt update
sudo apt install -y libvirt-daemon-system libvirt-clients
sudo systemctl start libvirtd
sudo systemctl enable libvirtd # enable on boot
sudo usermod -aG kvm pappa
sudo usermod -aG libvirt pappa
sudo apt install qemu-kvm bridge-utils virt-manager
virsh list --all
pappa@pappa-ThinkPad-X270:~$
Install all required libraries:
sudo apt install -y libtcmalloc-minimal4
sudo apt install -y qt5-default libqt5widgets5 libqt5webchannel5
export LD_LIBRARY_PATH=~/Android/Sdk/emulator/lib64/qt/lib:$LD_LIBRARY_PATH # For libQt5WebChannelAndroidEmu.so.5
export LD_LIBRARY_PATH=~/Android/Sdk/emulator/lib64:$LD_LIBRARY_PATH
pappa@pappa-ThinkPad-X270:~$ /home/pappa/Android/Sdk/emulator/qemu/linux-x86_64/qemu-system-x86_64 -netdelay none -netspeed full -no-snapshot-load -avd 5inchphode64bitemu_API_Tiramisu -qt-hide-window -grpc-use-token -idle-grpc-timeout 300 -verbose -accel on > qemu-system-x86_64.log 2>&1 &
[1] 45894
pappa@pappa-ThinkPad-X270:~$ ps aux | grep qemu-system-x86_64
pappa 50027 64.3 3.1 3909692 513036 pts/1 Sl 13:37 0:05 /home/pappa/Android/Sdk/emulator/qemu/linux-x86_64/qemu-system-x86_64 -netdelay none -netspeed full -no-snapshot-load -avd 5inchphode64bitemu_API_Tiramisu -qt-hide-window -grpc-use-token -idle-grpc-timeout 300 -verbose -accel on
pappa 50204 0.0 0.0 11580 720 pts/1 S+ 13:37 0:00 grep --color=auto qemu-system-x86_64
In log file we now have indication kvm acceleration is in use
pappa@pappa-ThinkPad-X270:~$ grep kvm qemu-system-x86_64.log # kvm is now shown in log as well
INFO | argv[12] = "-enable-kvm"
INFO | Concatenated QEMU options: /home/pappa/Android/Sdk/emulator/qemu/linux-x86_64/qemu-system-x86_64 -dns-server 1.1.1.1,1.0.0.1,208.67.222.222,208.67.220.220 -mem-path /home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/snapshots/default_boot/ram.img -mem-file-shared -serial null -device goldfish_pstore,addr=0xff018000,size=0x10000,file=/home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/data/misc/pstore/pstore.bin -cpu android64-xts -enable-kvm -smp cores=2 -m 2048 -lcd-density 420 -object iothread,id=disk-iothread -nodefaults -kernel /home/pappa/Android/Sdk/system-images/android-Tiramisu/google_apis/x86_64//kernel-ranchu -initrd /home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/initrd -drive if=none,index=0,id=system,if=none,file=/home/pappa/Android/Sdk/system-images/android-Tiramisu/google_apis/x86_64//system.img,read-only -device virtio-blk-pci,drive=system,iothread=disk-iothread,modern-pio-notify -drive if=none,index=1,id=cache,if=none,file=/home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/cache.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=cache,iothread=disk-iothread,modern-pio-notify -drive if=none,index=2,id=userdata,if=none,file=/home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/userdata-qemu.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=userdata,iothread=disk-iothread,modern-pio-notify -drive if=none,index=3,id=encrypt,if=none,file=/home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/encryptionkey.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=encrypt,iothread=disk-iothread,modern-pio-notify -drive if=none,index=4,id=vendor,if=none,file=/home/pappa/Android/Sdk/system-images/android-Tiramisu/google_apis/x86_64//vendor.img,read-only -device virtio-blk-pci,drive=vendor,iothread=disk-iothread,modern-pio-notify -drive if=none,index=5,id=sdcard,if=none,file=/home/pappa/.android/avd/5inchphode64bitemu_API_Tiramisu.avd/sdcard.img.qcow2,overlap-check=none,cache=unsafe,l2-cache-size=1048576 -device virtio-blk-pci,drive=sdcard,iothread=disk-iothread,modern-pio-notify -netdev user,id=mynet -device virtio-net-pci,netdev=mynet -chardev null,id=forhvc0 -chardev null,id=forhvc1 -device virtio-serial-pci,ioeventfd=off -device virtconsole,chardev=forhvc0 -device virtconsole,chardev=forhvc1 -chardev netsim,id=bluetooth -device virtserialport,chardev=bluetooth,name=bluetooth -device virtio-serial,ioeventfd=off -chardev socket,port=35915,host=::1,nowait,nodelay,reconnect=10,ipv6,id=modem -device virtserialport,chardev=modem,name=modem -device virtio-rng-pci -show-cursor -device virtio_input_multi_touch_pci_1 -device virtio_input_multi_touch_pci_2 -device virtio_input_multi_touch_pci_3 -device virtio_input_multi_touch_pci_4 -device virtio_input_multi_touch_pci_5 -device virtio_input_multi_touch_pci_6 -device virtio_input_multi_touch_pci_7 -device virtio_input_multi_touch_pci_8 -device virtio_input_multi_touch_pci_9 -device virtio_input_multi_touch_pci_10 -device virtio_input_multi_touch_pci_11 -device virtio-keyboard-pci -netdev user,id=virtio-wifi,dhcpstart=10.0.2.16 -device virtio-wifi-pci,netdev=virtio-wifi -device virtio-vsock-pci,guest-cid=77 -L /home/pappa/Android/Sdk/emulator/lib/pc-bios -soundhw hda -vga none -append 'no_timer_check 8250.nr_uarts=1 clocksource=pit console=0 cma=288M@0-4G ndns=4 loop.max_part=7 ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000$0xff018000 printk.devkmsg=on bootconfig' -android-hw /home/pappa/.android/avd/../avd/5inchphode64bitemu_API_Tiramisu.avd/hardware-qemu.ini
pappa@pappa-ThinkPad-X270:~$
Unfortunately starting from within AndroidStudio still does not use kvm:
pappa@pappa-ThinkPad-X270:~$ ps aux | grep qemu-system-x86_64
pappa 49364 107 13.2 4869220 2133308 ? Sl 13:31 3:14 /home/pappa/Android/Sdk/emulator/qemu/linux-x86_64/qemu-system-x86_64 -netdelay none -netspeed full -no-snapshot-load -avd 5inchphode64bitemu_API_Tiramisu -qt-hide-window -grpc-use-token -idle-grpc-timeout 300
pappa 49896 0.0 0.0 11580 656 pts/1 S+ 13:34 0:00 grep --color=auto qemu-system-x86_64
pappa@pappa-ThinkPad-X270:~$
AndroidStudio is said to recognize if acceleration is available and use it automatically. Doesn’t seem to be so. Need to start it from command line for the time being until get it figured out how to do it from within AndroidStudio.
After taking above kvm emulation into use, my system started to have some network lags after having been up for a longer period without a boot. Shutdown after such a lag had been experienced also took a long time, cursor just blinked in a black screen. Eventually system was shut down though.
Thought libvirtd enabling in boot might cause the problem, as that was enabled while taking kvm acceleration in use.
But sadly
sudo systemctl disable libvirtd
didn’t remove it from boot, it was still running after reboot. Had to disable below libvirt stuff as well
sudo systemctl disable libvirt-guests
sudo systemctl disable libvirtd-admin.socket
sudo systemctl disable libvirtd.socket
sudo systemctl disable libvirtd-ro.socket
Now after reboot, libvirtd wasn’t running any more.