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DescriptionJonathan Edwards
2020-07-09 15:05:43 UTC
Created attachment 1700460[details]
Windows 10 KVM v ESX disk IO test
Description of problem:
Observing excessive slowness of storage IO with a Windows 10 guest on RHEL 7 KVM vs a similar configuration on ESX - on the order of 300-400% worse over KVM
Version-Release number of selected component (if applicable):
qemu-img-rhev-2.12.0-33.el7_7.4.x86_64
qemu-kvm-common-rhev-2.12.0-33.el7_7.4.x86_64
libvirt-daemon-driver-qemu-4.5.0-23.el7_7.1.x86_64
qemu-kvm-rhev-2.12.0-33.el7_7.4.x86_64
ipxe-roms-qemu-20180825-2.git133f4c.el7.noarch
Windows Qemu Package
c:\Program Files\Qemu-ga>qemu-ga.exe -V
QEMU Guest Agent 100.0.0
Backing Store
Local disk
File System Type xfs:
/dev/sda5 xfs 6.9T 1.6T 5.4T 23% /mnt/datastore
Getting Created Partition 5:
sgdisk -n 1:2048:+${uefi_size}M \
-n 2:0:+${bootsz}M \
-n 3:0:+${biosbootsz}M \
-n 4:0:+${rootsz}M \
-n 5:0:0 \
-t 1:EF00 \
-t 2:0700 \
-t 3:EF02 \
-t 4:8E00 \
-t 5:8E00 /dev/${bid}
Hardware (HPE) Controller:
Smart Array P440ar
RAID 5
ESX controller emulation
LSI Logic SAS
How reproducible:
100%
Steps to reproduce:
1. iometer, fio, winsat disk (pick your favorite disk io testing tool)
Results:
https://docs.google.com/spreadsheets/d/1ZP8V_Q0-peIqJJO5aigGmzGn6YJwNXf6HkI1iUJ_x_s