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devel / comp.unix.bsd.freebsd.misc / RAM huge pages?

SubjectAuthor
* RAM huge pages?David Chmelik
`* Re: RAM huge pages?Andreas Kempe
 `* Re: RAM huge pages?David Chmelik
  `* Re: RAM huge pages?Andreas Kempe
   `* Re: RAM huge pages?David Chmelik
    `- Re: RAM huge pages?Andreas Kempe

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RAM huge pages?

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From: dchme...@gmail.com (David Chmelik)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: RAM huge pages?
Date: Tue, 2 Jan 2024 06:44:36 -0000 (UTC)
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 by: David Chmelik - Tue, 2 Jan 2024 06:44 UTC

Can one set 1280 2MB and allow 1GB RAM huge pages? There's a bash script
that does on GNU/Linux (by the xmr-stak-rx programmer) but this expects
Linux kernel software/settings not present on *BSD...

Re: RAM huge pages?

<un25oh$1c4a$2@nyheter.lysator.liu.se>

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From: kem...@lysator.liu.se (Andreas Kempe)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: RAM huge pages?
Date: Tue, 2 Jan 2024 23:20:49 -0000 (UTC)
Organization: Lysator ACS
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 by: Andreas Kempe - Tue, 2 Jan 2024 23:20 UTC

Den 2024-01-02 skrev David Chmelik <dchmelik@gmail.com>:
> Can one set 1280 2MB and allow 1GB RAM huge pages? There's a bash script
> that does on GNU/Linux (by the xmr-stak-rx programmer) but this expects
> Linux kernel software/settings not present on *BSD...

FreeBSD's virtual memory system automatically merges smaller pages
into larger pages if appropriate. This is done automatically and you
don't have to change any settings. You can find a counter of how many
promotions have happened in the vm.pmap.pde.promotions sysctl.

Re: RAM huge pages?

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From: dchme...@gmail.com (David Chmelik)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: RAM huge pages?
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 by: David Chmelik - Wed, 3 Jan 2024 02:29 UTC

On Tue, 2 Jan 2024 23:20:49 -0000 (UTC), Andreas Kempe wrote:

> Den 2024-01-02 skrev David Chmelik <dchmelik@gmail.com>:
>> Can one set 1280 2MB and allow 1GB RAM huge pages? There's a bash
>> script that does on GNU/Linux (by the xmr-stak-rx programmer) but this
>> expects Linux kernel software/settings not present on *BSD...
>
> FreeBSD's virtual memory system automatically merges smaller pages into
> larger pages if appropriate. This is done automatically and you don't
> have to change any settings. You can find a counter of how many
> promotions have happened in the vm.pmap.pde.promotions sysctl.

Great... however, I installed ports/net-p2p/xmrig which says 1GB huge-
pages are unavailable... is it inaccurate or I should bug-report to xmrig
computer/software programmer/developer it's not programmed right for
FreeBSD UNIX?

Re: RAM huge pages?

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From: kem...@lysator.liu.se (Andreas Kempe)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: RAM huge pages?
Date: Wed, 3 Jan 2024 12:35:19 -0000 (UTC)
Organization: Lysator ACS
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 by: Andreas Kempe - Wed, 3 Jan 2024 12:35 UTC

Den 2024-01-03 skrev David Chmelik <dchmelik@gmail.com>:
>
> Great... however, I installed ports/net-p2p/xmrig which says 1GB huge-
> pages are unavailable... is it inaccurate or I should bug-report to xmrig
> computer/software programmer/developer it's not programmed right for
> FreeBSD UNIX?

As far as I know, FreeBSD's max page size is 2 MB. I think 1 GB pages
are a Linux specific thing.

Re: RAM huge pages?

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From: dchme...@gmail.com (David Chmelik)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: RAM huge pages?
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 by: David Chmelik - Thu, 4 Jan 2024 04:31 UTC

On Wed, 3 Jan 2024 12:35:19 -0000 (UTC), Andreas Kempe wrote:

> Den 2024-01-03 skrev David Chmelik <dchmelik@gmail.com>:
>>
>> Great... however, I installed ports/net-p2p/xmrig which says 1GB huge-
>> pages are unavailable... is it inaccurate or I should bug-report to
>> xmrig computer/software programmer/developer it's not programmed right
>> for FreeBSD UNIX?
>
> As far as I know, FreeBSD's max page size is 2 MB. I think 1 GB pages
> are a Linux specific thing.

I read they might still exist as 'superpages'?

Re: RAM huge pages?

<un7hcn$2voq$1@nyheter.lysator.liu.se>

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From: kem...@lysator.liu.se (Andreas Kempe)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: RAM huge pages?
Date: Fri, 5 Jan 2024 00:09:59 -0000 (UTC)
Organization: Lysator ACS
Message-ID: <un7hcn$2voq$1@nyheter.lysator.liu.se>
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 by: Andreas Kempe - Fri, 5 Jan 2024 00:09 UTC

Den 2024-01-04 skrev David Chmelik <dchmelik@gmail.com>:
> On Wed, 3 Jan 2024 12:35:19 -0000 (UTC), Andreas Kempe wrote:
>> As far as I know, FreeBSD's max page size is 2 MB. I think 1 GB pages
>> are a Linux specific thing.
>
> I read they might still exist as 'superpages'?

AFAIK, super pages are the 2 MB pages and they are the largest
continuous allocations FreeBSD makes.


devel / comp.unix.bsd.freebsd.misc / RAM huge pages?

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