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- #!/bin/bash
- sudo modprobe msr
- if [[ -z $(which rdmsr) ]]; then
- echo "msr-tools is not installed. Run 'sudo apt-get install msr-tools' to install it." >&2
- exit 1
- fi
- if [[ ! -z $1 && $1 != "enable" && $1 != "disable" ]]; then
- echo "Invalid argument: $1" >&2
- echo ""
- echo "Usage: $(basename $0) [disable|enable]"
- exit 1
- fi
- cores=$(cat /proc/cpuinfo | grep processor | awk '{print $3}')
- for core in $cores; do
- if [[ $1 == "disable" ]]; then
- sudo wrmsr -p${core} 0x1a0 0x4000850089
- fi
- if [[ $1 == "enable" ]]; then
- sudo wrmsr -p${core} 0x1a0 0x850089
- fi
- state=$(sudo rdmsr -p${core} 0x1a0 -f 38:38)
- if [[ $state -eq 1 ]]; then
- echo "core ${core}: disabled"
- else
- echo "core ${core}: enabled"
- fi
- done
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