How to enable 1G hugepages?

[Oliv3]

I did exactly what is described above with 8 hugepages of 1GB

cat /proc/cmdline
initrd=\EFI\proxmox\6.17.4-2-pve\initrd.img-6.17.4-2-pve root=ZFS=rpool/ROOT/pve-1 boot=zfs intel_iommu=on iommu=pt transparent_hugepage=never default_hugepagesz=1G hugepagesz=1G hugepages=8

nano /etc/pve/qemu-server/xxx.conf

hugepages: 1024 # line added

> proxmox-boot-tool refresh

then reboot

# Before runing my VM

grep -i huge /proc/meminfo
AnonHugePages:         0 kB
ShmemHugePages:     8192 kB
FileHugePages:         0 kB
HugePages_Total:       8
HugePages_Free:        8
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:    1048576 kB
Hugetlb:         8388608 kB

# After running my VM

grep -i huge /proc/meminfo
AnonHugePages:         0 kB
ShmemHugePages:     8192 kB
FileHugePages:         0 kB
HugePages_Total:       8
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:    1048576 kB
Hugetlb:         8388608 kB

HugePages_Free: 8 => HugePages_Free: 0
It is working

 

[LnxBil]

It is working

Glad to see.

Are you seeing any performance improvement in your use case? If not, using hugepages may not be the best thing to do. In my tests, I could see an increase in 10% memory allocation performance within benchmarks, yet you pay with a lot of unflexability for this improvement.

 

[Oliv3]

"..you pay with a lot of unflexability for this improvement."

i agree, then i haved removed it