Re: [RFC PATCH 5/6] zsmalloc: introduce handle mapping API

[Sergey Senozhatsky]

On (25/01/28 17:21), Yosry Ahmed wrote:
> On Tue, Jan 28, 2025 at 06:38:35PM +0900, Sergey Senozhatsky wrote:
> > On (25/01/28 14:29), Sergey Senozhatsky wrote:
> > > Maybe copy-in is just an okay thing to do.  Let me try to measure.
> 
> Yeah seems like the optimization is effective, at least on that
> workload

The workload is just lots of browser tabs (zram is configured as a
swap device), so it's quite representative.

> unless the memcpy() is cheap and avoiding it is not buying as
> much
>
> ...
>
> (do you know if that's the case?).

We run on arm64 and x86_64 on a variety of models from low-cost ones to
high-cost ones.  I probably wouldn't expect memcpy() of 6GB of random
sized objects (loop unrolling is possible only partially) to be cheap
in general.