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authorChristian Krinitsin <mail@krinitsin.com>2025-06-16 16:59:00 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-16 16:59:33 +0000
commit9aba81d8eb048db908c94a3c40c25a5fde0caee6 (patch)
treeb765e7fb5e9a3c2143c68b0414e0055adb70e785 /results/classifier/118/none/1137
parentb89a938452613061c0f1f23e710281cf5c83cb29 (diff)
downloadqemu-analysis-9aba81d8eb048db908c94a3c40c25a5fde0caee6.tar.gz
qemu-analysis-9aba81d8eb048db908c94a3c40c25a5fde0caee6.zip
add 18th iteration of classifier
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+performance: 0.783
+architecture: 0.764
+user-level: 0.754
+x86: 0.738
+kernel: 0.727
+device: 0.694
+socket: 0.691
+boot: 0.679
+peripherals: 0.656
+graphic: 0.642
+KVM: 0.640
+hypervisor: 0.635
+ppc: 0.630
+vnc: 0.628
+register: 0.622
+TCG: 0.615
+VMM: 0.612
+PID: 0.608
+permissions: 0.608
+semantic: 0.608
+risc-v: 0.607
+i386: 0.586
+files: 0.579
+arm: 0.548
+network: 0.545
+debug: 0.534
+virtual: 0.522
+assembly: 0.463
+mistranslation: 0.417
+
+When using qemu-system-x86_64 whpx acceleration, cpu information is set strangely.
+Description of problem:
+When using the guest with whpx acceleration in qemu-system-x86_64, the CPU information of the guest seems to be set strangely.
+
+When the guest is Linux, it seems that individual CPUs are allocated as many as the number of cores when using the -accel whpx option and the -smp option.
+* -smp 4, -smp cores=4, -smp sockes=1, cores=4, threads=1 are all set to have 4 single-core CPUs plugged in
+
+If the guest is Windows, check the information with CPU-Z
+ It is recognized as a Pentium 4 and is displayed as a CPU with 1 core and n threads.
+
+Physically, it seems to be set to have n individual CPUs with 1 core plugged in.
+In Windows 11 Home (which seems to be the case for all versions of Windows Home), you cannot give the -smp value more than 5.
+* When booting with the -smp option value of 5 or more, a BSOD saying multiprocessor configuration not supported appears. -smp n, -smp cores=n, -smp sockes=1,cores=n,threads=1 All same symptoms occur
+Steps to reproduce:
+1. Boot Windows or Linux with -accel whpx -smp 4 option (or with the -accel whpx -smp sockets=1,cores=4,threads=1 option to make it deterministic)
+2. For Linux guest, use cat /proc/cpuinfo to check cpu information, for Windows guest, use cpu-z, device manager, task manager, etc. to check cpu information
+3. In the information of the Linux guest, it is displayed as fixed as core id : 0, cpu cores : 1, 
+   In Windows guest, information is displayed as written in "Description of problem" respectively.
+Additional information:
+**Windows 11 Home Guest set to 4 cores :**
+
+qemu-system-x86_64 -M q35 -smp sockets=1,cores=4,threads=1 -m 8g -device qxl-vga,vgamem_mb=256 -display sdl -drive file="Windows 11.vmdk",id=disk,if=none -device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0 -rtc base=localtime -usbdevice tablet -accel whpx
+![Windows_Guest](/uploads/7b38889ff4ef20c935f724b0307766c9/Windows_Guest.jpg)
+
+
+**Windows 11 Home Guest set to 5 cores :**
+
+qemu-system-x86_64 -M q35 -smp sockets=1,cores=5,threads=1 -m 8g -device qxl-vga,vgamem_mb=256 -display sdl -drive file="Windows 11.vmdk",id=disk,if=none -device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0 -rtc base=localtime -usbdevice tablet -accel whpx
+![BSOD](/uploads/910378cc73140831d9db5c58cb575bb8/BSOD.jpg)
+
+
+**Linux (Debian 11) guest set to 4 cores :**
+
+qemu-system-x86_64 -M q35 -smp sockets=1,cores=4,threads=1 -m 4g -device qxl-vga,vgamem_mb=256 -display sdl -drive file="debian.vdi",id=disk,if=none -device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0 -rtc base=localtime -usbdevice tablet -accel whpx
+![Linux_Guest](/uploads/d1dbb2e38fcba57741c43f0f348297a2/Linux_Guest.jpg)