Re: [PATCH 00/24] x86/resctrl: Merge the CDP resources

2020-11-17 Thread James Morse
Hi Reinette, On 16/11/2020 17:54, Reinette Chatre wrote: > On 10/30/2020 9:10 AM, James Morse wrote: >> MPAM has an equivalent feature to CDP, but its a property of the CPU, >> not the cache. Resctrl needs to have x86's odd/even behaviour, as that >> its the ABI, but this isn't how the MPAM

Re: [PATCH 00/24] x86/resctrl: Merge the CDP resources

2020-11-16 Thread Reinette Chatre
Hi James, On 10/30/2020 9:10 AM, James Morse wrote: MPAM has an equivalent feature to CDP, but its a property of the CPU, not the cache. Resctrl needs to have x86's odd/even behaviour, as that its the ABI, but this isn't how the MPAM hardware works. It is entirely possible that an in-kernel

Re: [PATCH 00/24] x86/resctrl: Merge the CDP resources

2020-11-13 Thread Jamie Iles
Hi James, On Fri, Oct 30, 2020 at 04:10:56PM +, James Morse wrote: > Hi folks, > > This series re-folds the resctrl code so the CDP resources (L3CODE et al) > behaviour is all contained in the filesystem parts, with a minimum amount > of arch specific code. > > Arm have some CPU support for

[PATCH 00/24] x86/resctrl: Merge the CDP resources

2020-10-30 Thread James Morse
Hi folks, This series re-folds the resctrl code so the CDP resources (L3CODE et al) behaviour is all contained in the filesystem parts, with a minimum amount of arch specific code. Arm have some CPU support for dividing caches into portions, and applying bandwidth limits at various points in the