Control CPU frequency and idle settings

This selection of script, config and systemd unit file shall give
control over configuring the CPU behaviour with cpupower on startup.

Since SuSE does not ship anything we have to write our own...

cpupower/cpupower

@@ -0,0 +1,2 @@
+CPU_GOVERNOR="performance"
+CPU_CSTATES_DISABLE_BY_LATENCY="3"

cpupower/cpupower.examples

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+ansible -b all -m copy -a "src=cpupower.sh dest=/usr/local/sbin/cpupower.sh"
+ansible -b all -m copy -a "src=cpupower.service dest=/etc/systemd/system/cpupower.service"
+ansible -b all -m copy -a "src=cpupower.sh dest=/usr/local/sbin/cpupower.sh mode=0755"
+
+ansible -b all -m shell -a "systemctl enable --now cpupower.service"
+
+ansible -b all -m shell -a "cpupower frequency-info | grep governor; cpupower idle-info | grep ^C"
+
+l3support@uxicasfs01:~/cpupower> ansible -b all -m shell -a "cpupower frequency-info | grep governor; cpupower idle-info | grep ^C"
+uxicasfs02 | CHANGED | rc=0 >>
+  available cpufreq governors: performance powersave
+                  The governor "performance" may decide which speed to use
+CPUidle driver: intel_idle
+CPUidle governor: menu
+C1:
+C1E (DISABLED) :
+C6 (DISABLED) :
+uxicasfs01 | CHANGED | rc=0 >>
+  available cpufreq governors: performance powersave
+                  The governor "performance" may decide which speed to use
+CPUidle driver: intel_idle
+CPUidle governor: menu
+C1:
+C1E (DISABLED) :
+C6 (DISABLED) :

cpupower/cpupower.service

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+[Unit]
+Description=Configure cpupower related settings
+
+[Service]
+EnvironmentFile=-/etc/default/cpupower
+Type=oneshot
+ExecStart=/usr/local/sbin/cpupower.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target

cpupower/cpupower.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+CPUPOWER_CONFIG="/etc/default/cpupower"
+
+if [ -f "${CPUPOWER_CONFIG}" ]; then
+  source "${CPUPOWER_CONFIG}"
+else
+  exit 0
+fi
+
+print_header() {
+cat << HEADER
+
+###############################################################################
+# ${@}
+###############################################################################
+HEADER
+}
+
+# Set the CPU governor
+if [ ! "${CPU_GOVERNOR}" == "" ]; then
+  print_header "Setting CPU governor to ${CPU_GOVERNOR}"
+  cpupower frequency-set --governor "${CPU_GOVERNOR}" &> /dev/null
+  cpupower frequency-info
+else
+  echo "CPU governor is not set."
+fi
+
+# Set the Cstate by latency
+if [ ! "${CPU_CSTATES_DISABLE_BY_LATENCY}" == "" ]; then
+  print_header "Setting CPU CStates by latency to ${CPU_CSTATES_DISABLE_BY_LATENCY}"
+  cpupower idle-set --disable-by-latency "${CPU_CSTATES_DISABLE_BY_LATENCY}" &> /dev/null
+  cpupower idle-info
+else
+  echo "No CPU Cstates by latency configured."
+fi