feat(pwr): Log AMD CPU package power in the Script 4 loop

avt_pmpower.sh runs AVTCMD -module pmm "get_pmdata()" and summarizes
SktPwr, PPT Fast / Slow against their limits, and MemPwr. -p takes the
AVTCMD path, -q drops the raw PM table. Exit 2 = AVTCMD missing,
3 = AVTCMD failed, 4 = nothing parsed. The values are SMU telemetry, not
a measurement.

Script 4 calls it every round after the two TH6_SWB power readbacks, so
switch rails and CPU package power sit side by side in each sample.

AVT is under NDA and not shipped in Blanton_Script. It has to be
unpacked on the DUT at ~/AVT_Linux_NDA_2.8.37/ beforehand; otherwise the
call exits 2 each round and the loop continues without the reading.
Without -q the full PM table is logged once a minute.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UniUXkxgCG2Ty74advL8Pd

src/Script_ABC_Blanton/4_Blanton_Script_thermal_safety.ttl

@@ -152,6 +152,8 @@ while 1
     sendln "~/Blanton_Script/TH6_SWB0_power_readback.sh"
     wait prompt_sonic_root
     sendln "~/Blanton_Script/TH6_SWB1_power_readback.sh"
+    wait prompt_sonic_root
+    sendln "~/Blanton_Script/avt_pmpower.sh -p ~/AVT_Linux_NDA_2.8.37/AVTCMD"
 
     ; Background jobs Check
     wait prompt_sonic_root

src/Script_ABC_Blanton/Blanton_Script/avt_pmpower.sh

@@ -0,0 +1,137 @@
+#!/bin/bash
+#===============================================================================
+# Script  : avt_pmpower.sh
+# Purpose : Dump AMD AVT PM table (get_pmdata) and summarize package power.
+#
+# Author  : ETWen
+# Date    : 20260923
+#
+# Version History
+# V1.0.0     20260923    Initial Version
+#
+# Usage   : ./avt_pmpower.sh [-p <AVTCMD path>] [-q] [-h]
+#             -p   Path to AVTCMD (default: $AVTCMD_PATH or ./AVTCMD)
+#             -q   Quiet: summary only, suppress raw PM table
+#             -h   Help
+#
+# Exit    : 0 ok / 1 usage / 2 AVTCMD not found / 3 AVTCMD failed
+#           4 parse failed (no power fields found)
+#
+# Note    : Values come from SMU telemetry, not direct measurement. Absolute
+#           accuracy depends on BIOS SVI telemetry calibration. Cross-check
+#           against VR PMBus READ_POUT when accuracy matters.
+#===============================================================================
+
+set -u
+set -o pipefail
+
+#------------------------------------------------------------------------------
+# Defaults
+#------------------------------------------------------------------------------
+AVTCMD_BIN="${AVTCMD_PATH:-./AVTCMD}"
+AVT_MODULE="pmm"
+AVT_CMD="get_pmdata()"
+QUIET=0
+
+#------------------------------------------------------------------------------
+# usage - print help
+#------------------------------------------------------------------------------
+usage() {
+    sed -n '/^# Usage/,/^# Exit/p' "$0" | sed 's/^# \{0,1\}//'
+}
+
+#------------------------------------------------------------------------------
+# Argument parsing
+#------------------------------------------------------------------------------
+while getopts ":p:qh" opt; do
+    case "$opt" in
+        p) AVTCMD_BIN="$OPTARG" ;;
+        q) QUIET=1 ;;
+        h) usage; exit 0 ;;
+        :) echo "ERROR: -$OPTARG requires an argument" >&2; usage >&2; exit 1 ;;
+        \?) echo "ERROR: unknown option -$OPTARG" >&2; usage >&2; exit 1 ;;
+    esac
+done
+
+#------------------------------------------------------------------------------
+# Pre-flight check
+#------------------------------------------------------------------------------
+if [ ! -x "$AVTCMD_BIN" ]; then
+    echo "ERROR: AVTCMD not found or not executable: $AVTCMD_BIN" >&2
+    echo "       Use -p <path> or export AVTCMD_PATH=<path>" >&2
+    exit 2
+fi
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo "WARN : not running as root, AVTCMD may fail to access SMU." >&2
+fi
+
+#------------------------------------------------------------------------------
+# Collect PM table
+#------------------------------------------------------------------------------
+RAW="$("$AVTCMD_BIN" -module "$AVT_MODULE" "$AVT_CMD" 2>&1)"
+RC=$?
+if [ $RC -ne 0 ]; then
+    echo "ERROR: AVTCMD exited with code $RC" >&2
+    echo "$RAW" >&2
+    exit 3
+fi
+
+if [ "$QUIET" -eq 0 ]; then
+    printf '%s\n' "$RAW"
+fi
+
+#------------------------------------------------------------------------------
+# Parse & summarize
+#   - split on whitespace and comma, keep only "key:number" tokens
+#   - bracketed tokens ([Pkg:0], [MISC]) are skipped by the regex anchor
+#------------------------------------------------------------------------------
+printf '%s\n' "$RAW" | awk '
+{
+    n = split($0, a, /[ ,]+/)
+    for (i = 1; i <= n; i++) {
+        if (a[i] ~ /^[A-Za-z0-9_()]+:[-0-9.]+$/) {
+            split(a[i], kv, ":")
+            m[kv[1]] = kv[2]
+            found++
+        }
+    }
+}
+
+# pct - usage against limit, guard divide-by-zero
+function pct(v, l) {
+    return (l > 0) ? sprintf("%5.1f%%", 100 * v / l) : "  n/a"
+}
+
+# has - field present in PM table
+function has(k) {
+    return (k in m)
+}
+
+END {
+    if (found == 0) {
+        print "ERROR: no PM fields parsed, PM table format may have changed." > "/dev/stderr"
+        exit 4
+    }
+
+    print "===== Package Power (live) ====="
+
+    if (has("SktPwr(W)"))
+        printf "%-9s: %7.2f W\n", "SktPwr", m["SktPwr(W)"]
+
+    if (has("PPT_VALUE_FAST"))
+        printf "%-9s: %7.2f / %3d W  %s\n", "PPT Fast",
+               m["PPT_VALUE_FAST"], m["PPT_LIMIT_FAST"],
+               pct(m["PPT_VALUE_FAST"], m["PPT_LIMIT_FAST"])
+
+    if (has("PPT_VALUE_SLOW"))
+        printf "%-9s: %7.2f / %3d W  %s (%ss avg)\n", "PPT Slow",
+               m["PPT_VALUE_SLOW"], m["PPT_LIMIT_SLOW"],
+               pct(m["PPT_VALUE_SLOW"], m["PPT_LIMIT_SLOW"]),
+               (has("SlowPPTTimeConstant") ? m["SlowPPTTimeConstant"] : "?")
+
+    if (has("MemPwr(W)"))
+        printf "%-9s: %7.2f W\n", "MemPwr", m["MemPwr(W)"]
+}
+'
+exit $?