Added Scheduler testcase

This test validates the Scheduler support by checking corresponding
SCHED configs and checks cpu affinity by creating a CPU-bound background task

Signed-off-by: Vamsee Narapareddi <[email protected]>

Author: vnarapar

Runner/suites/Kernel/FunctionalArea/Scheduler/CPU_affinity/README.md

@@ -0,0 +1,37 @@
+# Scheduler CPU Affinity validation Test
+
+This test validates the Scheduler support and runtime status on Qualcomm platforms with Yocto builds.
+
+## Overview
+
+The test script performs these functional checks:
+
+1. **Kernel Configuration**:
+   - Validates presence of `CONFIG_SCHED_DEBUG`, `CONFIG_CGROUP_SCHED` and `CONFIG_SMP*` entries in `/proc/config.gz`.
+
+2. **Runtime Verification**:
+   - Checks cpu affinity by creating a CPU-bound background task
+
+## How to Run
+
+```sh
+source init_env
+cd suites/Kernel/FunctionalArea/Scheduler/CPU_affinity
+./run.sh
+```
+
+## Prerequisites
+
+- `taskset`, `grep`, `zgrep`, `top`, `chrt` must be available
+- Root access may be required for complete validation
+
+## Result Format
+
+Test result will be saved in `CPU_affinity.res` as:
+- `Default scheduling policy detected. Test passed` – if all validations pass
+- `Unexpected scheduling policy. Test Failed` – if any check fails
+
+## License
+
+SPDX-License-Identifier: BSD-3-Clause-Clear  
+(C) Qualcomm Technologies, Inc. and/or its subsidiaries.

Runner/suites/Kernel/FunctionalArea/Scheduler/CPU_affinity/run.sh

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+#!/bin/sh
+# Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# Robustly find and source init_env
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+INIT_ENV=""
+SEARCH="$SCRIPT_DIR"
+while [ "$SEARCH" != "/" ]; do
+    if [ -f "$SEARCH/init_env" ]; then
+        INIT_ENV="$SEARCH/init_env"
+        break
+    fi
+    SEARCH=$(dirname "$SEARCH")
+done
+ 
+if [ -z "$INIT_ENV" ]; then
+    echo "[ERROR] Could not find init_env (starting at $SCRIPT_DIR)" >&2
+    exit 1
+fi
+ 
+# Only source if not already loaded (idempotent)
+if [ -z "$__INIT_ENV_LOADED" ]; then
+    # shellcheck disable=SC1090
+    . "$INIT_ENV"
+fi
+# Always source functestlib.sh, using $TOOLS exported by init_env
+# shellcheck disable=SC1090,SC1091
+. "$TOOLS/functestlib.sh"
+
+TESTNAME="CPU_affinity"
+test_path=$(find_test_case_by_name "$TESTNAME")
+cd "$test_path" || exit 1
+# shellcheck disable=SC2034
+res_file="./$TESTNAME.res"
+
+log_info "----------------------------------------------------"
+log_info "-------- Starting $TESTNAME Functional Test --------"
+
+check_dependencies taskset top chrt zcat grep
+
+REQUIRED_CONFIGS="CONFIG_SCHED_DEBUG CONFIG_CGROUP_SCHED CONFIG_SMP"
+for config in $REQUIRED_CONFIGS; do
+    if check_kernel_config "$config"; then
+        log_pass "$config is enabled"
+        echo "$TESTNAME PASS" > "$res_file"
+    else
+        log_fail "$config is missing"
+        echo "$TESTNAME FAIL" > "$res_file"
+        exit 1
+    fi
+done
+
+log_info "Creating a CPU-bound background task..."
+cpu_task() {
+    while :; do :; done
+}
+cpu_task &
+TASK_PID=$!
+sleep 2
+
+log_info "Checking CPU affinity of task $TASK_PID..."
+CPU_AFFINITY=$(taskset -p $TASK_PID | awk -F: '{print $2}' | xargs)
+log_info "CPU affinity: $CPU_AFFINITY"
+
+log_info "Setting affinity to CPU 0"
+taskset -pc 0 $TASK_PID > /dev/null
+sleep 1
+
+NEW_AFFINITY=$(taskset -p $TASK_PID | awk -F: '{print $2}' | xargs)
+if [ "$NEW_AFFINITY" = "1" ]; then
+    log_pass "Successfully set CPU affinity"
+    echo "$TESTNAME PASS" > "$res_file"
+else
+    log_fail "Failed to set CPU affinity"
+    echo "$TESTNAME FAIL" > "$res_file"
+fi
+
+log_info "Checking scheduling policy of task..."
+SCHED_POLICY=$(chrt -p $TASK_PID | grep "scheduling policy" | awk -F: '{print $2}' | xargs)
+log_info "Scheduling Policy: $SCHED_POLICY"
+
+if echo "$SCHED_POLICY" | grep -q "SCHED_OTHER"; then
+    log_pass "Default scheduling policy detected. Test passed"
+    echo "$TESTNAME PASS" > "$res_file"
+else
+    log_fail "Unexpected scheduling policy. Test Failed"
+    echo "$TESTNAME FAIL" > "$res_file"
+fi
+
+kill $TASK_PID
+echo "$TESTNAME PASS" > $test_path/$TESTNAME.res
+log_info "-------- Completed $TESTNAME Functional Test --------"