1 files changed, 128 insertions, 0 deletions
diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh
new file mode 100755
index 000000000..e7008f614
--- /dev/null
+++ b/tools/testing/selftests/intel_pstate/run.sh
@@ -0,0 +1,128 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# This test runs on Intel x86 based hardware which support the intel_pstate
+# driver.  The test checks the frequency settings from the maximum turbo
+# state to the minimum supported frequency, in decrements of 100MHz.  The
+# test runs the aperf.c program to put load on each processor.
+#
+# The results are displayed in a table which indicate the "Target" state,
+# or the requested frequency in MHz, the Actual frequency, as read from
+# /proc/cpuinfo, the difference between the Target and Actual frequencies,
+# and the value of MSR 0x199 (MSR_IA32_PERF_CTL) which indicates what
+# pstate the cpu is in, and the value of
+# /sys/devices/system/cpu/intel_pstate/max_perf_pct X maximum turbo state
+#
+# Notes: In some cases several frequency values may be placed in the
+# /tmp/result.X files.  This is done on purpose in order to catch cases
+# where the pstate driver may not be working at all.  There is the case
+# where, for example, several "similar" frequencies are in the file:
+#
+#
+#/tmp/result.3100:1:cpu MHz              : 2899.980
+#/tmp/result.3100:2:cpu MHz              : 2900.000
+#/tmp/result.3100:3:msr 0x199: 0x1e00
+#/tmp/result.3100:4:max_perf_pct 94
+#
+# and the test will error out in those cases.  The result.X file can be checked
+# for consistency and modified to remove the extra MHz values.  The result.X
+# files can be re-evaluated by setting EVALUATE_ONLY to 1 below.
+
+EVALUATE_ONLY=0
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if ! uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ | grep -q x86; then
+	echo "$0 # Skipped: Test can only run on x86 architectures."
+	exit $ksft_skip
+fi
+
+msg="skip all tests:"
+if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then
+    echo $msg please run this as root >&2
+    exit $ksft_skip
+fi
+
+max_cpus=$(($(nproc)-1))
+
+function run_test () {
+
+	file_ext=$1
+	for cpu in `seq 0 $max_cpus`
+	do
+		echo "launching aperf load on $cpu"
+		./aperf $cpu &
+	done
+
+	echo "sleeping for 5 seconds"
+	sleep 5
+	grep MHz /proc/cpuinfo | sort -u > /tmp/result.freqs
+	num_freqs=$(wc -l /tmp/result.freqs | awk ' { print $1 } ')
+	if [ $num_freqs -ge 2 ]; then
+		tail -n 1 /tmp/result.freqs > /tmp/result.$1
+	else
+		cp /tmp/result.freqs /tmp/result.$1
+	fi
+	./msr 0 >> /tmp/result.$1
+
+	max_perf_pct=$(cat /sys/devices/system/cpu/intel_pstate/max_perf_pct)
+	echo "max_perf_pct $max_perf_pct" >> /tmp/result.$1
+
+	for job in `jobs -p`
+	do
+		echo "waiting for job id $job"
+		wait $job
+	done
+}
+
+#
+# MAIN (ALL UNITS IN MHZ)
+#
+
+# Get the marketing frequency
+_mkt_freq=$(cat /proc/cpuinfo | grep -m 1 "model name" | awk '{print $NF}')
+_mkt_freq=$(echo $_mkt_freq | tr -d [:alpha:][:punct:])
+mkt_freq=${_mkt_freq}0
+
+# Get the ranges from cpupower
+_min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ')
+min_freq=$(($_min_freq / 1000))
+_max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ')
+max_freq=$(($_max_freq / 1000))
+
+
+[ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq`
+do
+	echo "Setting maximum frequency to $freq"
+	cpupower frequency-set -g powersave --max=${freq}MHz >& /dev/null
+	run_test $freq
+done
+
+[ $EVALUATE_ONLY -eq 0 ] && cpupower frequency-set -g powersave --max=${max_freq}MHz >& /dev/null
+
+echo "========================================================================"
+echo "The marketing frequency of the cpu is $mkt_freq MHz"
+echo "The maximum frequency of the cpu is $max_freq MHz"
+echo "The minimum frequency of the cpu is $min_freq MHz"
+
+# make a pretty table
+echo "Target Actual Difference MSR(0x199) max_perf_pct" | tr " " "\n" > /tmp/result.tab
+for freq in `seq $max_freq -100 $min_freq`
+do
+	result_freq=$(cat /tmp/result.${freq} | grep "cpu MHz" | awk ' { print $4 } ' | awk -F "." ' { print $1 } ')
+	msr=$(cat /tmp/result.${freq} | grep "msr" | awk ' { print $3 } ')
+	max_perf_pct=$(cat /tmp/result.${freq} | grep "max_perf_pct" | awk ' { print $2 } ' )
+	cat >> /tmp/result.tab << EOF
+$freq
+$result_freq
+$((result_freq - freq))
+$msr
+$((max_perf_pct * max_freq))
+EOF
+done
+
+# print the table
+pr -aTt -5 < /tmp/result.tab
+
+exit 0