Hi Babu, On Thu, Mar 28, 2024 at 6:07 PM Babu Moger <babu.moger@xxxxxxx> wrote: > The list follows the following format: > > * Default CTRL_MON group: > "//<domain_id>=<assignment_flags>" > > * Non-default CTRL_MON group: > "<CTRL_MON group>//<domain_id>=<assignment_flags>" > > * Child MON group of default CTRL_MON group: > "/<MON group>/<domain_id>=<assignment_flags>" > > * Child MON group of non-default CTRL_MON group: > "<CTRL_MON group>/<MON group>/<domain_id>=<assignment_flags>" > > Assignment flags can be one of the following: > > t MBM total event is assigned > l MBM local event is assigned > tl Both total and local MBM events are assigned > _ None of the MBM events are assigned > > Examples: > > # cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control > non_defult_group//0=tl;1=tl;2=tl;3=tl;4=tl;5=tl;6=tl;7=tl; > non_defult_group/non_default_mon1/0=tl;1=tl;2=tl;3=tl;4=tl;5=tl;6=tl;7=tl; > //0=tl;1=tl;2=tl;3=tl;4=tl;5=tl;6=tl;7=tl; > /default_mon1/0=tl;1=tl;2=tl;3=tl;4=tl;5=tl;6=tl;7=tl; > > There are four groups and all the groups have local and total event assigned. > > "//" - This is a default CONTROL MON group > > "non_defult_group//" - This is non default CONTROL MON group > > "/default_mon1/" - This is Child MON group of the defult group > > "non_defult_group/non_default_mon1/" - This is child MON group of the non default group > > =tl means both total and local events are assigned. I recall there was supposed to be a way to perform the same update on all domains together so that it isn't tedious to not do per-domain customizations. (And also to avoid serializing programming all the domains the same way.) > > .../admin-guide/kernel-parameters.txt | 2 +- > Documentation/arch/x86/resctrl.rst | 144 ++++ > arch/x86/include/asm/cpufeatures.h | 1 + > arch/x86/include/asm/msr-index.h | 2 + > arch/x86/kernel/cpu/cpuid-deps.c | 3 + > arch/x86/kernel/cpu/resctrl/core.c | 25 +- > arch/x86/kernel/cpu/resctrl/internal.h | 56 +- > arch/x86/kernel/cpu/resctrl/monitor.c | 24 +- > arch/x86/kernel/cpu/resctrl/rdtgroup.c | 714 +++++++++++++++++- > arch/x86/kernel/cpu/scattered.c | 1 + > include/linux/resctrl.h | 12 + > 11 files changed, 964 insertions(+), 20 deletions(-) > > -- > 2.34.1 > This should be fine for me to get started with. I'll see if I can work backwards from the patches adding the parsing code to see how I'll work the software implementation in. Thanks! -Peter
