Re: [PATCH v2 0/6] memory: renesas-rpc-if: Optimize transfer overhead and implement runtime PM autosuspend

"Lad, Prabhakar" <[email protected]> Mon, 27 Jul 2026 18:58:42 +0100

Newsgroups	org.kernel.vger.linux-renesas-soc,org.kernel.vger.linux-kernel
Message-ID	<CA+V-a8vTjYKeGAt+FdRz3qsyyJLZxUFD1MDvSHsJv7=P+FHTfA@mail.gmail.com>

Hi Wolfram,

On Mon, Jul 27, 2026 at 4:51 PM Wolfram Sang
<[email protected]> wrote:
>
> Hi Prabhakar,
>
> > This patch series optimizes the Renesas RPC-IF driver by significantly
> > reducing software overhead in both the direct memory-mapped (dirmap) and
> > manual transfer paths, maximizing transaction throughput, and introducing
> > runtime PM autosuspend to prevent aggressive power gating during
> > consecutive flash operations.
>
> Sounds great. I want to test it on R-Car V4H SparrowHawk.
>
Thank you.

> > These changes were benchmarked using flash_speed on the RZ/T2H EVK with
> > xSPI0/1 interfaces operating in 1S-1S-1S mode for write operations:
>
> 'flash_speed' from mtd-utils, I assume. Did you use other options than
> '-d' for testing writes?
>
Apart from the -d option I used `-c 256` option too.

Cheers,
Prabhakar