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Diffstat (limited to 'results/classifier/mode-deepseek-r1:32b/reasoning/system/1520')
| -rw-r--r-- | results/classifier/mode-deepseek-r1:32b/reasoning/system/1520 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/results/classifier/mode-deepseek-r1:32b/reasoning/system/1520 b/results/classifier/mode-deepseek-r1:32b/reasoning/system/1520 new file mode 100644 index 00000000..452bcbdf --- /dev/null +++ b/results/classifier/mode-deepseek-r1:32b/reasoning/system/1520 @@ -0,0 +1,17 @@ +<think> +Okay, I'm trying to figure out whether this bug is user-mode or system-mode related based on the description provided. + +The problem occurs when running an x86 guest using OVMF under QEMU on an s390x host. The slowdown happens specifically when using more SMP (Symmetric Multi-Processing) virtual CPUs than the host has physical CPUs. This issue is only present after applying a specific patch related to ACPI and CPU hotplug, which suggests it's tied to how certain hardware emulation or system-level features are handled. + +The affected tests involve OVMF, which is used for UEFI booting in QEMU. The slowdown is significant—about ten times slower when the conditions are met. This isn't just a minor hiccup but a substantial performance regression that affects automated tests and could impact real-world use cases where users might run more virtual CPUs than physical ones. + +Looking at the steps to reproduce, it involves command-line options for QEMU specifying SMP settings. The fact that this behavior is specific to s390x hosts when emulating x86 suggests that it's related to how the emulator handles different architectures and their interactions with system-level components like CPU hotplug or ACPI. + +The additional information mentions that only signed OVMF cases are affected, while aavmf isn't. This indicates that the issue is tied to specific firmware configurations, which in turn relates to how the hypervisor interacts with the guest's firmware—definitely a lower-level concern rather than user applications. + +Furthermore, the patch mentioned (dab30fb) deals with ACPI and CPU hotplug, which are system-level features. This suggests that the problem is rooted in how QEMU manages these system resources when emulating across different architectures, especially under certain SMP configurations. + +In summary, the bug affects system-level interactions such as firmware handling, CPU resource management, and emulation of hardware features across different architectures. It's not related to user applications running within the guest but rather the underlying system-mode operations that QEMU performs. +</think> + +system \ No newline at end of file |