; freebsd-hackers@freebsd.org
Subject: Re: Multiple page size support on FreeBSD?
On 4/10/13 11:42 AM, Benjamin Kaduk wrote:
On Wed, 10 Apr 2013, Wojciech Puchar wrote:
How do your tests work? Do you examine PTEs directly to check for
superpages or are you relying on the vm.pmap.pde sysctls
On Monday, April 08, 2013 6:39:31 am Wojciech Puchar wrote:
Superpage promotion happens automatically when consecutive data are
accessed
according to the proper heuristic.
and in practice - unless there are only few processes, never really works.
this is a result of my own tests.
How do your tests work? Do you examine PTEs directly to check for superpages
or are you relying on the vm.pmap.pde sysctls?
the later.
anyway - algorithm described on list - that heuristics detects consecutive
page access doesn't really help the urgent case - RANDOM access to large
amount
On Wed, 10 Apr 2013, Wojciech Puchar wrote:
How do your tests work? Do you examine PTEs directly to check for
superpages
or are you relying on the vm.pmap.pde sysctls?
the later.
anyway - algorithm described on list - that heuristics detects consecutive
page access doesn't really help the
On 4/10/13 11:42 AM, Benjamin Kaduk wrote:
On Wed, 10 Apr 2013, Wojciech Puchar wrote:
How do your tests work? Do you examine PTEs directly to check for
superpages
or are you relying on the vm.pmap.pde sysctls?
the later.
anyway - algorithm described on list - that heuristics detects
On Wed, Apr 10, 2013 at 7:49 PM, Wojciech Puchar
woj...@wojtek.tensor.gdynia.pl wrote:
How do your tests work? Do you examine PTEs directly to check for
superpages
or are you relying on the vm.pmap.pde sysctls?
the later.
anyway - algorithm described on list - that heuristics detects
-Original Message-
From: owner-freebsd-hack...@freebsd.org
[mailto:owner-freebsd-hack...@freebsd.org] On Behalf Of Alfred Perlstein
Sent: Wednesday, April 10, 2013 4:00 PM
To: Benjamin Kaduk
Cc: Wojciech Puchar; Sebastian Feld; freebsd-hackers@freebsd.org
Subject: Re: Multiple page size support
-
From: owner-freebsd-hack...@freebsd.org
[mailto:owner-freebsd-hack...@freebsd.org] On Behalf Of Alfred Perlstein
Sent: Wednesday, April 10, 2013 4:00 PM
To: Benjamin Kaduk
Cc: Wojciech Puchar; Sebastian Feld; freebsd-hackers@freebsd.org
Subject: Re: Multiple page size support on FreeBSD?
On 4
Superpage promotion happens automatically when consecutive data are accessed
according to the proper heuristic.
and in practice - unless there are only few processes, never really works.
this is a result of my own tests.
___
Does FreeBSD support multiple page sizes in a single userland process
like Solaris 11 does?
___
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On Sun, 7 Apr 2013, Sebastian Feld wrote:
Does FreeBSD support multiple page sizes in a single userland process
like Solaris 11 does?
Superpage promotion happens automatically when consecutive data are
accessed according to the proper heuristic. As promotion is dynamic,
necessarily a
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