[x264-devel] Performance difference between windows and linux

[Pradeep Ramachandran]

On Fri, Feb 3, 2017 at 8:39 PM, Henrik Gramner <henrik at gramner.com> wrote:

> On Fri, Feb 3, 2017 at 6:58 AM, Pradeep Ramachandran
> <pradeeprama at gmail.com> wrote:
> > Hi all,
> > I notice an ~50% performance difference between windows and linux
> platforms
> > on the same hardware (linux is faster) when I encode 4K videos with the
> most
> > presets with x264. When I poked further, we notice that the page-faults
> in
> > windows are 2-3 orders of magnitude more than on linux, and this is
> despite
> > using the VirtualPrefetch() function in x264.
> >
> > Does anyone have any experience with this that they can share to improve
> > this?
> >
> > Pradeep.
>
> Is this with the OS file cache cleared beforehand on both systems?
>
> Just to make sure it's not reading from RAM on one system and from
> disk on the other.
>

I'm copying my files to a RAM disk that I create using a tool like lmdisk
and reading files from there; shouldn't that be sufficient?


>
> Henrik
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