Hi Reinette, On 10/25/22 18:50, Reinette Chatre wrote: > Hi Babu, > > On 10/17/2022 3:27 PM, Babu Moger wrote: > > ... > >> +"mbm_total_config", "mbm_local_config": >> + These files contain the current event configuration for the events >> + mbm_total_bytes and mbm_local_bytes, respectively, when the >> + Bandwidth Monitoring Event Configuration (BMEC) feature is supported. >> + The event configuration settings are domain specific and will affect >> + all the CPUs in the domain. >> + >> + Following are the types of events supported: >> + >> + ==== ======================================================== >> + Bits Description >> + ==== ======================================================== >> + 6 Dirty Victims from the QOS domain to all types of memory >> + 5 Reads to slow memory in the non-local NUMA domain >> + 4 Reads to slow memory in the local NUMA domain >> + 3 Non-temporal writes to non-local NUMA domain >> + 2 Non-temporal writes to local NUMA domain >> + 1 Reads to memory in the non-local NUMA domain >> + 0 Reads to memory in the local NUMA domain >> + ==== ======================================================== >> + >> + By default, the mbm_total_bytes configuration is set to 0x7f to count >> + all the event types and the mbm_local_bytes configuration is set to >> + 0x15 to count all the local memory events. >> + >> + Examples: >> + >> + * To view the current configuration:: >> + :: >> + >> + # cat /sys/fs/resctrl/info/L3_MON/mbm_total_config >> + 0=0x7f;1=0x7f;2=0x7f;3=0x7f >> + >> + # cat /sys/fs/resctrl/info/L3_MON/mbm_local_config >> + 0=0x15;1=0x15;3=0x15;4=0x15 >> + >> + * To change the mbm_total_bytes to count only reads on domain 0, >> + the bits 0, 1, 4 and 5 needs to be set, which is 110011b in binary >> + (in hexadecimal 0x33): >> + :: >> + >> + # echo "0=0x33" > /sys/fs/resctrl/info/L3_MON/mbm_total_config >> + >> + # cat /sys/fs/resctrl/info/L3_MON/mbm_total_config >> + 0=0x33;1=0x7f;2=0x7f;3=0x7f >> + >> + * To change the mbm_local_bytes to count all the slow memory reads >> + on domain 1, the bits 4 and 5 needs to be set, which is 110000b >> + in binary (in hexadecimal 0x30): >> + :: >> + >> + # echo "1=0x30" > /sys/fs/resctrl/info/L3_MON/mbm_local_config >> + >> + # cat /sys/fs/resctrl/info/L3_MON/mbm_local_config >> + 0=0x15;1=0x30;3=0x15;4=0x15 >> > The code supports modifying multiple domains with one write. To help users > understand this it may be useful to have one of these examples do so to show > that and how it can be done. Sure. > >> "max_threshold_occupancy": >> Read/write file provides the largest value (in >> @@ -464,6 +539,26 @@ Memory bandwidth domain is L3 cache. >> >> MB:<cache_id0>=bw_MBps0;<cache_id1>=bw_MBps1;... >> >> +Slow Memory bandwidth Allocation (SMBA) > bandwidth -> Bandwidth? ok > >> +--------------------------------------- >> +AMD hardwares support Slow Memory bandwidth Allocation (SMBA) feature. > hardware -> hardware? > bandwidth -> Bandwidth? Sure. Thanks Babu
