From 454561bf89fce4c656aaa7d0e05668f14a996370 Mon Sep 17 00:00:00 2001
From: Richael Zhuang <richael.zhuang@arm.com>
Date: Mon, 6 Sep 2021 10:33:42 +0800
Subject: [PATCH] test/scheduler: add test of cppc_cpufreq

current test only include intel acpi-cpufreq and pstate. Add test
of cppc_cpufreq which works on most arm platforms.

Change-Id: I5b34c15be7992e5a521d6acf7b5c30a0c4baaf9a
Signed-off-by: Richael Zhuang <richael.zhuang@arm.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9404
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
---
 test/scheduler/common.sh   | 35 +++++++++++++++++++++++++++++++++++
 test/scheduler/governor.sh | 11 +++++++++++
 2 files changed, 46 insertions(+)

diff --git a/test/scheduler/common.sh b/test/scheduler/common.sh
index be807211e..d6230b5cf 100644
--- a/test/scheduler/common.sh
+++ b/test/scheduler/common.sh
@@ -291,6 +291,41 @@ map_cpufreq() {
 					fi
 				done
 				;;
+			cppc_cpufreq)
+				cpufreq_setspeed[cpu_idx]=$(< "$cpu/cpufreq/scaling_setspeed")
+				scaling_min_freqs[cpu_idx]=$(< "$cpu/cpufreq/scaling_min_freq")
+				scaling_max_freqs[cpu_idx]=$(< "$cpu/cpufreq/scaling_max_freq")
+				cpuinfo_max_freqs[cpu_idx]=$(< "$cpu/cpufreq/cpuinfo_max_freq")
+				nominal_perf[cpu_idx]=$(< "$cpu/acpi_cppc/nominal_perf")
+				highest_perf[cpu_idx]=$(< "$cpu/acpi_cppc/highest_perf")
+
+				#the unit of highest_perf and nominal_perf differs on different arm platforms.
+				#For highest_perf, it maybe 300 or 3000000, both means 3.0GHz.
+				if ((highest_perf[cpu_idx] > nominal_perf[cpu_idx] && (\
+					highest_perf[cpu_idx] == cpuinfo_max_freqs[cpu_idx] || \
+					highest_perf[cpu_idx] * 10000 == cpuinfo_max_freqs[cpu_idx]))); then
+					cpufreq_is_turbo[cpu_idx]=1
+				else
+					cpufreq_is_turbo[cpu_idx]=0
+				fi
+
+				if ((nominal_perf[cpu_idx] < 10000)); then
+					nominal_perf[cpu_idx]=$((nominal_perf[cpu_idx] * 10000))
+				fi
+
+				num_freqs=$(((nominal_perf[cpu_idx] - scaling_min_freqs[cpu_idx]) / 100000 + 1 + \
+					cpufreq_is_turbo[cpu_idx]))
+
+				available_freqs=()
+				for ((freq = 0; freq < num_freqs; freq++)); do
+					if ((freq == 0 && cpufreq_is_turbo[cpu_idx] == 1)); then
+						available_freqs[freq]=$((scaling_max_freqs[cpu_idx]))
+					else
+						available_freqs[freq]=$((nominal_perf[cpu_idx] - (\
+							freq - cpufreq_is_turbo[cpu_idx]) * 100000))
+					fi
+				done
+				;;
 		esac
 	done
 	if [[ -e $sysfs_cpu/cpufreq/boost ]]; then
diff --git a/test/scheduler/governor.sh b/test/scheduler/governor.sh
index fea69dcfd..2dfd798d6 100755
--- a/test/scheduler/governor.sh
+++ b/test/scheduler/governor.sh
@@ -38,6 +38,7 @@ update_main_core_cpufreq() {
 	case "$main_core_driver" in
 		acpi-cpufreq) main_core_setspeed=${cpufreq_setspeed[spdk_main_core]} ;;
 		intel_pstate | intel_cpufreq) main_core_setspeed=$main_core_set_max_freq ;;
+		cppc_cpufreq) main_core_setspeed=${cpufreq_setspeed[spdk_main_core]} ;;
 	esac
 }
 
@@ -56,6 +57,10 @@ verify_dpdk_governor() {
 	#    - governor set to performance
 	#    - lowering max_freq and min_freq for the main core
 	#    - having max_freq and min_freq at lowest supported frequency
+	#  - cppc_cpufreq:
+	#    - governor set to userspace
+	#    - lowering setspeed for the main core
+	#    - having setspeed at lowest supported frequency
 
 	local -g cpus
 
@@ -105,6 +110,12 @@ verify_dpdk_governor() {
 					&& ((main_core_set_max_freq == main_core_set_min_freq)) \
 					&& ((dir == 0))
 				;;
+			cppc_cpufreq)
+				[[ $main_core_governor == userspace ]] \
+					&& [[ -n ${main_core_freqs_map[main_core_setspeed]} ]] \
+					&& ((main_core_setspeed == main_core_freqs[-1])) \
+					&& ((dir == 0))
+				;;
 		esac && all_set=1
 
 		# Print stats after first sane sample was taken