Messages in this thread | | | Date | Mon, 27 Mar 2023 12:49:44 +0100 | From | Conor Dooley <> | Subject | Re: [PATCH V2] riscv: export cpu/freq invariant to scheduler |
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+CC Bjorn,
On Thu, Mar 23, 2023 at 08:39:24PM +0800, Song Shuai wrote: > RISC-V now manages CPU topology using arch_topology which provides > CPU capacity and frequency related interfaces to access the cpu/freq > invariant in possible heterogeneous or DVFS-enabled platforms. > > Here adds topology.h file to export the arch_topology interfaces for > replacing the scheduler's constant-based cpu/freq invariant accounting. > > Signed-off-by: Song Shuai <suagrfillet@gmail.com>
Something in CI really, really doesn't like this patch: https://patchwork.kernel.org/project/linux-riscv/patch/20230323123924.3032174-1-suagrfillet@gmail.com/
The CI stuff applies the patch, builds the tree, resets to HEAD~1, builds it again, goes back to the applied patch and builds a third time. Builds 2 and 3 are incremental. In theory the same stuff should change between applying and removing the patch, and therefore each of builds 2 and 3 should have the same coverage, but that doesn't seem to be happening here. Build 2 looks to have rebuilt almost nothing and build 3 has rebuilt the world. I'm gonna chalk that one down as a CI issue rather than your patch!
That said, I was wondering if you would end up submitting this patch, given the discussion on your last one ;)
Looks to be the same as was done for arm64, so fwiw: Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Thanks, Conor.
> --- > changes from V1: > - fix the leading underscore and tidy the patch up > --- > arch/riscv/include/asm/topology.h | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > create mode 100644 arch/riscv/include/asm/topology.h > > diff --git a/arch/riscv/include/asm/topology.h b/arch/riscv/include/asm/topology.h > new file mode 100644 > index 000000000000..727e8d163a3b > --- /dev/null > +++ b/arch/riscv/include/asm/topology.h > @@ -0,0 +1,20 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#ifndef _ASM_RISCV_TOPOLOGY_H > +#define _ASM_RISCV_TOPOLOGY_H > + > +#include <linux/arch_topology.h> > + > +/* Replace task scheduler's default frequency-invariant accounting */ > +#define arch_scale_freq_tick topology_scale_freq_tick > +#define arch_set_freq_scale topology_set_freq_scale > +#define arch_scale_freq_capacity topology_get_freq_scale > +#define arch_scale_freq_invariant topology_scale_freq_invariant > + > +/* Replace task scheduler's default cpu-invariant accounting */ > +#define arch_scale_cpu_capacity topology_get_cpu_scale > + > +/* Enable topology flag updates */ > +#define arch_update_cpu_topology topology_update_cpu_topology > + > +#include <asm-generic/topology.h> > +#endif /* _ASM_RISCV_TOPOLOGY_H */ > -- > 2.20.1 > > [unhandled content-type:application/pgp-signature] | |