1 files changed, 70 insertions, 0 deletions
diff --git a/results/classifier/zero-shot/118/TCG/693 b/results/classifier/zero-shot/118/TCG/693
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+TCG: 0.933
+graphic: 0.891
+performance: 0.851
+virtual: 0.721
+boot: 0.627
+device: 0.626
+hypervisor: 0.573
+architecture: 0.518
+semantic: 0.507
+i386: 0.357
+x86: 0.311
+debug: 0.273
+network: 0.243
+PID: 0.232
+permissions: 0.214
+ppc: 0.212
+mistranslation: 0.182
+vnc: 0.171
+risc-v: 0.165
+kernel: 0.130
+user-level: 0.123
+arm: 0.115
+register: 0.105
+peripherals: 0.104
+socket: 0.101
+VMM: 0.039
+assembly: 0.024
+files: 0.011
+KVM: 0.006
+--------------------
+virtual: 0.987
+TCG: 0.873
+performance: 0.843
+hypervisor: 0.800
+x86: 0.411
+kernel: 0.069
+debug: 0.033
+VMM: 0.016
+device: 0.016
+PID: 0.013
+register: 0.010
+i386: 0.010
+boot: 0.008
+files: 0.008
+ppc: 0.007
+arm: 0.004
+user-level: 0.004
+assembly: 0.003
+socket: 0.003
+KVM: 0.002
+risc-v: 0.001
+network: 0.001
+semantic: 0.001
+architecture: 0.001
+vnc: 0.001
+graphic: 0.001
+permissions: 0.001
+peripherals: 0.001
+mistranslation: 0.000
+
+Qemu increased memory usage with TCG
+Description of problem:
+The issue is that instances that are supposed to use only a small amount of memory (like 256MB) suddenly use a much higher amount of RSS when running the accel=tcg, around 512MB in the above example. This was not happening with qemu-4.2 (on Ubuntu 20.04). This is also not happening when using accel=kvm instead. The issue has been first noticed on Debian 11 (Bullseye) with the versions above, but it is happening in the same way on Centos 8 Stream, Ubuntu 21.10 and a pre-release version of Ubuntu 22.04. It also also seen when testing with qemu-6.1 built from source.
+Steps to reproduce:
+1. Deploy devstack (https://opendev.org/openstack/devstack) with VIRT_TYPE=qemu on a VM
+2. Start an instance with cirros image and a flavor allocating 256MB
+3. Do a ps and see a RSS size of about 512MB being used after the instance has finished booting
+4. Expected result (seen with qemu-4.2 or VIRT_TYPE=kvm): RSS stays < 256MB
+Additional information:
+I can try to find a smaller commandline for manual reproduction if needed. The above sample is generated by OpenStack Nova via libvirt.