On Wed, 08 Jan 2025 14:28:55 +0000, James Clark wrote:
> Discard mode (Armv8.6) is a way to enable SPE related PMU events without
> the overhead of recording any data. Add a format option, tests and docs
> for it.
>
> In theory we could make the driver drop calls to allocate the aux buffer
> when discard mode is enabled. This would give a small memory saving,
> but I think there is potential to interfere with any tools that don't
> expect this so I left the aux allocation untouched. Even old tools that
> don't know about discard mode will be able to use it because we publish
> the format option. Not allocating the aux buffer will have to be added
> to tools which I've done in Perf.
>
> [...]
Applied driver and docs patches to will (for-next/perf), thanks!
[1/5] perf: arm_spe: Add format option for discard mode
https://git.kernel.org/will/c/d28d95bc63cb
[2/5] perf docs: arm_spe: Document new discard mode
https://git.kernel.org/will/c/ba113ecad81a
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
