on 2021/4/13 22:53, Borislav Petkov wrote:
> I thought "should be better" too last time when I measured rep; movs vs
> NT stores but actual measurements showed no real difference.
Mabye the NT stores make difference when store to slow dimms, like the
persistent memory I just tested. Also, it lik
On Tue, Apr 13, 2021 at 08:54:55PM +0800, Kemeng Shi wrote:
> Yes. And NT stores should be better for copy_page especially copying a lot
> of pages as only partial memory of copied page will be access recently.
I thought "should be better" too last time when I measured rep; movs vs
NT stores but a
on 2021/4/13 19:01, Borislav Petkov wrote:
> + linux-nvdimm
>
> Original mail at
> https://lkml.kernel.org/r/3f28adee-8214-fa8e-b368-eaf8b1934...@huawei.com
>
> On Tue, Apr 13, 2021 at 02:25:58PM +0800, Kemeng Shi wrote:
>> I'm using AEP with dax_kmem drvier, and AEP is export as a NUMA node
+ linux-nvdimm
Original mail at
https://lkml.kernel.org/r/3f28adee-8214-fa8e-b368-eaf8b1934...@huawei.com
On Tue, Apr 13, 2021 at 02:25:58PM +0800, Kemeng Shi wrote:
> I'm using AEP with dax_kmem drvier, and AEP is export as a NUMA node in
What is AEP?
> my system. I will move cold pages from
I'm using AEP with dax_kmem drvier, and AEP is export as a NUMA node in
my system. I will move cold pages from DRAM node to AEP node with
move_pages system call. With old "rep movsq', it costs 2030ms to move
1 GB pages. With "movnti", it only cost about 890ms to move 1GB pages.
I also test move 1GB
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