feat(animasi): T-0.4 spike lolos — ticker 30 FPS + toast harmonica, CPU idle 2.75% (F-026 awal)

scripts/measure-cpu.py

@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+"""Ukur CPU + output pty binary TUI tia (Phase 0).
+
+Dipakai untuk spike T-0.4 (docs/spikes/T-0.4-animasi.md):
+fase 1 animasi 30 FPS menyala, fase 2 setelah tombol 'a' (reduced-motion).
+
+Pakai:
+    python3 scripts/measure-cpu.py [./tia-love] [detik-per-fase]
+"""
+import fcntl
+import os
+import pty
+import signal
+import struct
+import sys
+import termios
+import threading
+import time
+
+BIN = sys.argv[1] if len(sys.argv) > 1 else "./tia-love"
+SECS = float(sys.argv[2]) if len(sys.argv) > 2 else 8.0
+ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+pid, fd = pty.fork()
+if pid == 0:
+    os.chdir(ROOT)
+    os.execvp("timeout", ["timeout", str(int(SECS * 2 + 10)), BIN])
+fcntl.ioctl(fd, termios.TIOCSWINSZ, struct.pack("HHHH", 40, 120, 0, 0))
+
+nbytes = [0]
+
+
+def drain():
+    while True:
+        try:
+            b = os.read(fd, 65536)
+        except OSError:
+            return
+        if not b:
+            return
+        nbytes[0] += len(b)
+
+
+threading.Thread(target=drain, daemon=True).start()
+
+
+def app_pid():
+    """PID anak (binary tia), bukan PID `timeout`."""
+    for _ in range(50):
+        try:
+            kids = open(f"/proc/{pid}/task/{pid}/children").read().split()
+            if kids:
+                return int(kids[0])
+        except FileNotFoundError:
+            pass
+        time.sleep(0.1)
+    return pid
+
+
+apid = app_pid()
+print("monitoring PID:", apid)
+
+HZ = os.sysconf("SC_CLK_TCK")
+
+
+def cpu():
+    p = open(f"/proc/{apid}/stat").read().split()
+    return (int(p[13]) + int(p[14])) / HZ
+
+
+def phase(label):
+    b0, c0, t0 = nbytes[0], cpu(), time.time()
+    time.sleep(SECS)
+    b1, c1, t1 = nbytes[0], cpu(), time.time()
+    print(f"{label:<38} CPU {100 * (c1 - c0) / (t1 - t0):5.2f}%  ·  output pty {(b1 - b0) / (t1 - t0) / 1024:5.1f} KB/s")
+
+
+time.sleep(3)  # warmup
+phase("FASE 1 (animasi 30fps)")
+os.write(fd, b"t")  # picu toast
+time.sleep(3.5)
+os.write(fd, b"a")  # reduced-motion
+time.sleep(1)
+phase("FASE 2 (reduced-motion)")
+try:
+    os.kill(pid, signal.SIGKILL)
+except ProcessLookupError:
+    pass
+print("selesai")