On Fri, Jan 10, 2025 at 04:22:48PM +0000, Will Deacon wrote: > 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! Picked the rest and added it to perf-tools-next, Thanks, - Arnaldo > [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
