Re: large pages
with 1536MB AMD64 machine it would be nice for FreeBSD to boot seeing 256 megs for itself and allowing 1280 megs to be mappedlocked to just one program. Hmm. Doesn't FreeBSD's default VM behavior do just fine dealing with one large active process without any unusual tuning? what version? 6.2 will? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: large pages
how can i check in program that the region is mapped using huge pages? i
use mmap with address padded to 4M and mlock.
On Sun, 1 Jul 2007, Chuck Swiger wrote:
Wojciech Puchar wrote:
does FreeBSD {can,will,patch exist} supports using huge pages? i mean 2M
pages on AMD64 and 2/4M pages on i386
I believe so, yes-- isn't this what the PAE kernel option does?
i need freebsd just for running one program needing about 1280 megs of data
space (+1-2 meg of code stacks etc. can be normally mapped). everything
else is just using less than 1% of power.
with 1536MB AMD64 machine it would be nice for FreeBSD to boot seeing 256
megs for itself and allowing 1280 megs to be mappedlocked to just one
program.
Hmm. Doesn't FreeBSD's default VM behavior do just fine dealing with one
large active process without any unusual tuning?
--
-Chuck
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Re: large pages
Wojciech Puchar wrote: how can i check in program that the region is mapped using huge pages? I am not entirely sure from within userland, but I believe the kernel boot messages will indicate the status of PAE. i use mmap with address padded to 4M and mlock. Note that there is a separate tunable for the maximum # of pages that a process or user can lock down; you'll probably need to increate that value. -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
large pages
does FreeBSD {can,will,patch exist} supports using huge pages? i mean 2M
pages on AMD64 and 2/4M pages on i386
i don't mean any automatics, just enough will be to be able to map a big
chunk of RAM to an app with such pages, or even more (better) to make
FreeBSD use only part of memory for itself, and leaving everything else as
/dev/something that can be mmap'ped (and locked) to program this way.
i need freebsd just for running one program needing about 1280 megs of
data space (+1-2 meg of code stacks etc. can be normally mapped).
everything else is just using less than 1% of power.
with 1536MB AMD64 machine it would be nice for FreeBSD to boot seeing 256
megs for itself and allowing 1280 megs to be mappedlocked to just one
program.
thank you very much
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Re: large pages
Wojciech Puchar wrote:
does FreeBSD {can,will,patch exist} supports using huge pages? i mean 2M
pages on AMD64 and 2/4M pages on i386
I believe so, yes-- isn't this what the PAE kernel option does?
i need freebsd just for running one program needing about 1280 megs of
data space (+1-2 meg of code stacks etc. can be normally mapped).
everything else is just using less than 1% of power.
with 1536MB AMD64 machine it would be nice for FreeBSD to boot seeing
256 megs for itself and allowing 1280 megs to be mappedlocked to just
one program.
Hmm. Doesn't FreeBSD's default VM behavior do just fine dealing with one
large active process without any unusual tuning?
--
-Chuck
___
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To unsubscribe, send any mail to [EMAIL PROTECTED]
