config-linux: documentation change for Intel RDT/MBA Software Controller support #992
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…ler support MBA Software Controller feature is introduced in Linux kernel v4.18. It is a software enhancement to mitigate some limitations in MBA which describes in kernel documentation. It also makes the interface more user friendly - we could specify memory bandwidth in "MBps" (Mega Bytes per second) as well as in "percentages". We could enable this feature through mount option "-o mba_MBps": mount -t resctrl resctrl -o mba_MBps /sys/fs/resctrl In runtime-spec, we handle both memory bandwidth schemata in unified format: "MB:<cache_id0>=bandwidth0;<cache_id1>=bandwidth1;..." The unit of memory bandwidth is specified in "percentages" by default, and in "MBps" if MBA Software Controller is enabled. For more information about Intel RDT and MBA Software Controller: https://www.kernel.org/doc/Documentation/x86/intel_rdt_ui.txt Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com>
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This is the prerequisite of runc PR:
opencontainers/runc#1919
MBA Software Controller feature is introduced in Linux kernel v4.18.
It is a software enhancement to mitigate some limitations in MBA which
describes in kernel documentation. It also makes the interface more user
friendly - we could specify memory bandwidth in "MBps" (Mega Bytes per
second) as well as in "percentages".
We could enable this feature through mount option "-o mba_MBps":
mount -t resctrl resctrl -o mba_MBps /sys/fs/resctrl
In runtime-spec, we handle both memory bandwidth schemata in unified
format: "MB:<cache_id0>=bandwidth0;<cache_id1>=bandwidth1;..."
The unit of memory bandwidth is specified in "percentages" by default,
and in "MBps" if MBA Software Controller is enabled.
For more information about Intel RDT and MBA Software Controller:
https://www.kernel.org/doc/Documentation/x86/intel_rdt_ui.txt
Signed-off-by: Xiaochen Shen xiaochen.shen@intel.com