I add "hugepagesz=1M hugepages=32" to grub.conf.
The "hugepagesz=16M" doesn't take effect.
The "hugepages=32" take effect.
What type is hardware support that?
Any help will be appreciated.
--Easley
------------------ Original ------------------
From: "bill4carson"<bill4car...@gmail.com>;
Date: Mon, Nov 14, 2011 09:47 AM
To: "Easley"<ugi...@gmail.com>;
Cc: "libhugetlbfs-devel"<libhugetlbfs-devel@lists.sourceforge.net>;
Subject: Re: [Libhugetlbfs-devel] How to change the hugepagesize?
On 2011年11月10日 17:27, Easley wrote:
>
> Thank you very much.
> I still have a question. How can I know that have been take effect?
> I take steps as follow:
> ------------------
> mkdir /hugetlb
> mount -t hugetlbfs hugetlbfs /hugetlb
> HUGETLB_MORECORE=yes LD_PRELOAD=libhugetlbfs.so hugepagesz=16M
> hugepages=32 ./myprogram
> ------------------
> That's right?
No
hugepagesz=16M hugepages=32 is for kernel boot command line
HUGETLB_MORECORE=yes LD_PRELOAD=libhugetlbfs.so will let malloc get huge
page based memory.
> Easley
> ------------------ Original ------------------
> *From: * "bill4carson"<bill4car...@gmail.com>;
> *Date: * Thu, Nov 10, 2011 11:24 AM
> *To: * "Easley"<ugi...@gmail.com>;
> *Cc: * "libhugetlbfs-devel"<libhugetlbfs-devel@lists.sourceforge.net>;
> *Subject: * Re: [Libhugetlbfs-devel] How to change the hugepagesize?
>
>
> On 2011年11月10日 10:41, Easley wrote:
> >
> > Hi,
> >
> > I run "grep Huge /proc/meminfo" in rhel5.4 .
> > it shows:
> > HugePages_Total: 0
> > HugePages_Free: 0
> > HugePages_Rsvd: 0
> > Hugepagesize: 2048 kB
> >
> > It says hugepagesize is 2M, how can I change the size to 16M?
> > Any help will be appreciated.
> >
> > Easley
>
> You can *only* do this by adding "hugepagesz=16M hugepages=32" into
> you command line
> to preallocate 32 16M hugepages.
>
> Prerequisite is you hardware support 16M huge page.
>
> >
> >
> ------------------------------------------------------------------------------
> > RSA(R) Conference 2012
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> >
> >
> > _______________________________________________
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> > Libhugetlbfs-devel@lists.sourceforge.net
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>
> --
> I am a slow learner
> but I will keep trying to fight for my dreams!
>
> --bill
>
--
I am a slow learner
but I will keep trying to fight for my dreams!
--bill
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