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Diffstat (limited to 'results/classifier/gemma3:12b/performance/1659')
| -rw-r--r-- | results/classifier/gemma3:12b/performance/1659 | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/performance/1659 b/results/classifier/gemma3:12b/performance/1659 new file mode 100644 index 00000000..0dbd80df --- /dev/null +++ b/results/classifier/gemma3:12b/performance/1659 @@ -0,0 +1,28 @@ + +x86 vm fails to stop on Darwin aarch64 when qemu compiled with -O1/-O2 +Description of problem: +When compiled with `-O2` or `-O1` qemu process hangs on full VM stopping on macOS aarch64 host if `shutdown -P now` initiated from guest system. +Steps to reproduce: +1. Compile latest qemu version with -O2 (default value) or -O1 passed +2. Run qemu-system-x86_64 with ubuntu image, e.g. https://cloud-images.ubuntu.com/focal/20230215/focal-server-cloudimg-amd64.img and custom cloud-init (for user/password authentication) +3. Wait until image is loaded, connect via vnc or provide login/password in stdio +4. Initiate shutdown with `sudo shutdown -P now` +5. See that VM indefinitely shutdowns +6. Kill VM from host system with kill -9 <qemu-system-x86_64-process-pid> +7. Recompile qemu with -O0 +8. Repeat steps 2-4 +9. See that vm successfully stopped, and qemu process exited with code 0 +Additional information: +I've created thread dump from activity monitor with threads which qemu hanging on, attached below +[sample-qemu-system-x86_64.txt](/uploads/119b89b7f55f4374acb9ae1f9dc2e517/sample-qemu-system-x86_64.txt) + +Probably there is some compiler optimisation which prevents qemu threads from receive shutdown signal or appropriate notification from another threads. + +The compiler version with which qemu is built: +```bash +% cc --version +Apple clang version 14.0.3 (clang-1403.0.22.14.1) +Target: arm64-apple-darwin22.4.0 +Thread model: posix +InstalledDir: /Library/Developer/CommandLineTools/usr/bin +``` |