Re: [Xen-devel] Converting heap page_infos to contiguous virtual

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 15/07/16 17:04, Konrad Rzeszutek Wilk wrote:
> On Fri, Jul 15, 2016 at 10:53:51AM -0400, Boris Ostrovsky wrote:
>> On 07/14/2016 09:29 AM, Andrew Cooper wrote:
>>> However, I would recommend getting something functioning first, before
>>> trying to optimise it.
>> There are two fairly independent parts to improving scrubbing: one is
>> making it asynchronous and second is improving clear_page() performance.
>> Whole-RAM mapping is needed for the latter.
> Attaching a nice graph of different memset on Broadwell (credits go to
> Joao for doing the testing). Skylake is 10% faster than Broadwell.

Graph says memcpy() not memset().

Either way, it looks like we would do very well to "borrow" a different
implementation.

~Andrew

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