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id = 2460
title = "Significant performance degradation of qemu-x86_64 starting from version 3 on aarch64"
state = "opened"
created_at = "2024-07-26T12:20:19.705Z"
closed_at = "n/a"
labels = ["accel: TCG"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2460"
host-os = "Centos 8"
host-arch = "aarch64"
qemu-version = "qemu-x86_64 version 9.0.1, qemu-x86_64 version 2.9.1"
guest-os = "n/a"
guest-arch = "n/a"
description = """When I ran CoreMark with different qemu user-mode versions，guest x86-64-> host arm64, I found that the performance was highest with QEMU 2.x versions, and there was a significant performance degradation starting from QEMU version 3. What is the reason?
| | | | | | | | | | | | |
|------------------------------------------|-------------|-------------|-------------|-------------|-------------|-------------|------------|-------------|-------------|-------------|-------------|
| qemu version | 2.5.1 | 2.8.0 | 2.9.0 | 2.9.1 | 3.0.0 | 4.0.0 | 5.2.0 | 6.2.0 | 7.2.13 | 8.2.6 | 9.0.1 |
| coremark score | 3905.995703 | 4465.947153 | 4534.119247 | 4538.577912 | 1167.337886 | 1163.399453 | 928.348384 | 1327.051954 | 1301.659616 | 1034.714677 | 1085.304971 |"""
reproduce = "n/a"
additional = "n/a"
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