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paintchip
n00b
Joined: 02 Jan 2010
Posts: 58
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 Posted: Thu Jul 15, 2021 3:08 pm Post subject: Hugepages |
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Hey all,
I went through a lot of trouble trying to get hugepages to be 1G and now I'm wondering if I did it correctly. I only ask because everything was already working normally in my Mint install, but I had to modify GRUB_CMDLINE_LINUX_DEFAULT="default_hugepagesz=1G hugepagesz=1G hugepages = 4" in /etc/default/grub in order to get it to work on Gentoo. Is there a better way to set these defaults on boot so that they won't also affect my Mint installation? Also, do those defaults seem okay/normal? I've got 16GB or RAM.
Some of my steps:
I've turned on all of the hugepages options I could find in the kernel
Set GRUB_CMDLINE_LINUX_DEFAULT="default_hugepagesz=1G hugepagesz=1G hugepages = 4" (and remade crug.cfg + restarted)
Verified that pageizes is 1048576 kB with cat /proc/meminfo | grep Huge
Verified that my program could use the new hugepages.
Resources:
https://www.reddit.com/r/Gentoo/comments/o4b67d/how_to_enable_huge_pages/
https://help.ubuntu.com/community/KVM%20-%20Using%20Hugepages
https://www.golinuxcloud.com/change-default-hugepage-size-cpu-support-rhel/ |
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mrbassie
l33t
Joined: 31 May 2013
Posts: 832
Location: Go past the sign for cope, right at the sign for seethe. If you see the target you've missed it.
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| Posted: Sat Jul 17, 2021 9:20 am Post subject: Re: Hugepages |
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| paintchip wrote: | Hey all,
I had to modify GRUB_CMDLINE_LINUX_DEFAULT="default_hugepagesz=1G hugepagesz=1G hugepages = 4" in /etc/default/grub in order to get it to work on Gentoo. Is there a better way to set these defaults on boot so that they won't also affect my Mint installation? Also, do those defaults seem okay/normal? I've got 16GB or RAM. |
Have a look at the kvm page in the arch wiki, they use a sysctl. |
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