[PATCH 00/18] mfd: convert to use maple tree register cache
Mark Brown
broonie at kernel.org
Tue Feb 6 02:59:05 PST 2024
On Tue, Feb 06, 2024 at 11:14:11AM +0100, Geert Uytterhoeven wrote:
> On Tue, Feb 6, 2024 at 11:09 AM Mark Brown <broonie at kernel.org> wrote:
> > There is a very small niche for devices where cache syncs are a
> > particularly important part of the workload where rbtree's choices might
> > give better performance, especially on systems with low end CPUs.
> The REGCACHE_* value is specified by the device, not by the CPU?
The device is going to dominate here, the main thing is how much of the
workload consists of syncs.
> While some of these MFD devices are on-SoC, and thus there is some
> relation between device and CPU, several others (e.g. PMICs) are
> external, and thus might be present on systems with a variety of CPU
> performance.
> Perhaps the value should depend on some CPU heuristic instead?
No.
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