Hi, On Mon, Feb 10, 2025 at 10:10:26AM -0800, Reinette Chatre wrote: > Hi Babu, > > On 2/7/25 10:23 AM, Moger, Babu wrote: > > On 2/5/2025 5:57 PM, Reinette Chatre wrote: > >> On 1/22/25 12:20 PM, Babu Moger wrote: [...] > >>> MBM events of a monitoring group is tracked by hardware. Such queries > >>> are acceptable because of a very small number of assignable counters. > >> > >> It is not obvious what "very small number" means. Is it possible to give > >> a range to help reader understand the motivation? > > > > How about? > > > > MBM events of a monitoring group is tracked by hardware. Such queries > > are acceptable because of a very small number of assignable counters(32 to 64). > > Yes, thank you. This helps to understand the claim. > > Reinette Do these queries only happen when userspace reads an mbm_assign_control file? It might be worth documenting somewhere that writing and (especially) reading an mbm_assign_control file is not intended to be super-fast. It feels like userspace should not generally rely on reading mbm_assign_control files except for diagnostic purposes, or occasional read-modify-write transformations. Or do expect some other usage model that makes this a hotter path? Cheers ---Dave
