Hi Babu,
On 3/4/2024 2:24 PM, Moger, Babu wrote:
> Based on our discussion, I am listing few examples here. Let me know if I missed something.
>
> mount -t resctrl resctrl /sys/fs/resctrl/
When creating examples it may help to accompany it with an overview of
which groups exist.
>
> 1. Assign both local and total counters to default group on domain 0 and 1.
> $echo "//00=lt;01=lt" > /sys/fs/resctrl/info/L3_MON/mbm_assign_control
>
> $cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
> //00=lt;01=lt
I also think it will be useful to always print a small header that guides
the interpretation. For example,
$ cat mbm_assign_control
#control_group/monitor_group/flags
...
>
> 2. Assign a total event to mon group inside the default group for both domain 0 and 1.
>
> $mkdir /sys/fs/resctrl/mon_groups/mon_a
> $echo "/mon_a/00+t;01+t" > /sys/fs/resctrl/info/L3_MON/mbm_assign_control
>
> $cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
> //00=lt;01=lt
> /mon_a/00=t;01=t
For an example of "+" I think understanding the output will be easier if the "before" view with
existing flags is available. For example,
if it was
$cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
#control_group/monitor_group/flags
/mon_a/00=l;01=l
then
$echo "/mon_a/00+t;01+t" > /sys/fs/resctrl/info/L3_MON/mbm_assign_control
would result in:
$cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
#control_group/monitor_group/flags
/mon_a/00=lt;01=lt
An example like above would make it easier to understand how it is different
from using "=" like in example 1.
>
> 3. Assign a local event to non-default control mon group both domain 0 and 1.
> $mkdir /sys/fs/resctrl/ctrl_a
> $echo "/ctrl_a/00=l;01=l" > /sys/fs/resctrl/info/L3_MON/mbm_assign_control
I think this should be:
$echo "ctrl_a//00=l;01=l" > /sys/fs/resctrl/info/L3_MON/mbm_assign_control
>
> $cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
> //00=lt;01=lt
> /mon_a/00=t;01=t
> /ctrl_a/00=l;01=l
ctrl_a//00=l;01=l
>
> 4. Assign a both counters to mon group inside another control group(non-default).
> $mkdir /sys/fs/resctrl/ctrl_a/mon_ab/
Above will not work.
$ mkdir /sys/fs/resctrl/ctrl_a
$ mkdir /sys/fs/resctrl/ctrl_a/mon_groups/mon_ab
> $echo "ctrl_a/mon_ab/00=lt;01=lt" > /sys/fs/resctrl/nfo/L3_MON/mbm_assign_contro
(watch out for typos in examples)
>
> $cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
> //00=lt;01=lt
> /mon_a/00=t;01=t
> /ctrl_a/00=l;01=l
> ctrl_a/mon_ab/00=lt;01=lt
>
> 5. Unassign a counter to mon group inside another control group(non-default).
> $echo "ctrl_a/mon_ab/00-l;01-l" > /sys/fs/resctrl/nfo/L3_MON/mbm_assign_control
>
> $cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
> //00=lt;01=lt
> /mon_a/00=t;01=t
> /ctrl_a/00=l;01=l
> ctrl_a/mon_ab/00=t;01=t
ack.
>
> 6. Unassign all the counters on a specific group.
> $echo "ctrl_a/mon_ab/00=_" > /sys/fs/resctrl/nfo/L3_MON/mbm_assign_control
(watch for typos)
Note that this only did unassign on domain 0.
>
> $cat /sys/fs/resctrl/info/L3_MON/mbm_assign_control
> //00=lt;01=lt
> /mon_a/00=t;01=t
> /ctrl_a/00=l;01=l
> ctrl_a/mon_ab/00=_;01=_
ctrl_a/mon_ab/00=_;01=t
To address some earlier requirements I think it will be helpful to also
show an example of multiple groups changed with a single write.
Reinette
