Intel Resource Director Technology fails after upgrade to Red Hat Enterprise Linux 7.5
Issue
- Intel Resource Director Technology fails after upgrade to Red Hat Enterprise Linux 7.5
# mount -t resctrl resctrl /sys/fs/resctrl
# echo "L3:0=f;1=3ff" > /sys/fs/resctrl/schemata
-bash: echo: write error: Invalid argument
And pqos -s shows no change to cache allocation:
# pqos -s
NOTE: Mixed use of MSR and kernel interfaces to manage
CAT or CMT & MBM may lead to unexpected behavior.
L3CA/MBA COS definitions for Socket 0:
L3CA COS0 => MASK 0x7ff
L3CA COS1 => MASK 0x7ff
L3CA COS2 => MASK 0x7ff
L3CA COS3 => MASK 0x7ff
L3CA COS4 => MASK 0x7ff
L3CA COS5 => MASK 0x7ff
L3CA COS6 => MASK 0x7ff
L3CA COS7 => MASK 0x7ff
L3CA COS8 => MASK 0x7ff
L3CA COS9 => MASK 0x7ff
L3CA COS10 => MASK 0x7ff
L3CA COS11 => MASK 0x7ff
L3CA COS12 => MASK 0x7ff
L3CA COS13 => MASK 0x7ff
L3CA COS14 => MASK 0x7ff
L3CA COS15 => MASK 0x7ff
MBA COS0 => 100% available
MBA COS1 => 100% available
MBA COS2 => 100% available
MBA COS3 => 100% available
MBA COS4 => 100% available
MBA COS5 => 100% available
MBA COS6 => 100% available
MBA COS7 => 100% available
Environment
- Red Hat Enterprise Linux 7.5
- Specifically kernel version
kernel-3.10.0-862.el7
- Specifically kernel version
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