mirror of
https://github.com/openglow-org/forgefirm.git
synced 2026-09-28 01:01:12 -07:00
ScottW514
ff117c4f6b
The host-side coolant and fan tools call the ssh on PATH, or the client named by GF_SSH (a wrapper such as a WSL distro's ssh), instead of a fixed wrapper. The bench README lists every committed tool and data file, and explains how the coolant-flow fire-gate threshold was derived from the committed flow-matrix data and how to re-run that derivation on another machine.
101 lines
3.1 KiB
Python
101 lines
3.1 KiB
Python
#!/usr/bin/env python3
|
|
"""Sustained-load test for periodic flow re-checks.
|
|
|
|
Question: what does repeated interrogation cost thermally over a long
|
|
job, and does the loop reach equilibrium or climb without bound? Runs
|
|
the driver's real check cadence (M8 held for the duration) with the
|
|
cut-profile fans, logging bulk coolant temperature and every verdict.
|
|
|
|
Usage: flow_sustained.py [minutes] (default 30)
|
|
"""
|
|
import math
|
|
import os
|
|
import shlex
|
|
import re
|
|
import socket
|
|
import subprocess
|
|
import sys
|
|
import time
|
|
|
|
HOST = os.environ.get('GF_HOST')
|
|
if not HOST:
|
|
raise SystemExit('set GF_HOST to the machine IP address')
|
|
# ssh client used to reach the board; override for a wrapper, e.g.
|
|
# GF_SSH='wsl -d <distro> -- ssh'.
|
|
SSH = shlex.split(os.environ.get('GF_SSH', 'ssh'))
|
|
F = 1024.0 * 1.3
|
|
RD, BETA = 10000.0, 3380.0
|
|
RINF = 10000.0 * math.exp(-3380.0 / 298.15)
|
|
|
|
|
|
def degc(raw):
|
|
r = RD / (F / float(raw) - 1.0)
|
|
return BETA / math.log(r / RINF) - 273.15
|
|
|
|
|
|
def board(cmd):
|
|
r = subprocess.run(SSH + ['-o', 'PreferredAuthentications=none',
|
|
'root@' + HOST, cmd],
|
|
capture_output=True, text=True, timeout=30)
|
|
return r.stdout.strip()
|
|
|
|
|
|
def temps():
|
|
o = board('cat /sys/glowforge/pic/water_temp_1 /sys/glowforge/pic/water_temp_2').split()
|
|
return degc(o[0]), degc(o[1])
|
|
|
|
|
|
minutes = float(sys.argv[1]) if len(sys.argv) > 1 else 30
|
|
|
|
s = socket.create_connection((HOST, 23), timeout=5)
|
|
s.settimeout(0.3)
|
|
time.sleep(0.5)
|
|
try:
|
|
while s.recv(4096):
|
|
pass
|
|
except socket.timeout:
|
|
pass
|
|
|
|
d0, u0 = temps()
|
|
print('start: down=%.2f up=%.2f running M8 for %.0f min' % (d0, u0, minutes))
|
|
s.sendall(b'M8\n')
|
|
|
|
t0 = time.time()
|
|
verdicts = []
|
|
peak_up = u0
|
|
buf = ''
|
|
while time.time() - t0 < minutes * 60:
|
|
try:
|
|
buf += s.recv(4096).decode('ascii', 'replace')
|
|
except socket.timeout:
|
|
pass
|
|
for line in buf.split('\n'):
|
|
if 'flow' in line and ('verified' in line or 'FAULT' in line):
|
|
m = re.search(r'rise ([\d.]+) C', line)
|
|
if m and (not verdicts or verdicts[-1][1] != float(m.group(1))):
|
|
el = (time.time() - t0) / 60
|
|
verdicts.append((el, float(m.group(1)), 'FAULT' in line))
|
|
d, u = temps()
|
|
peak_up = max(peak_up, u)
|
|
print(' %5.1f min rise=%5.2f %-8s loop down=%.2f up=%.2f (%+.2f from start)'
|
|
% (el, float(m.group(1)), 'FAULT' if 'FAULT' in line else 'ok', d, u, u - u0),
|
|
flush=True)
|
|
buf = buf[-2000:]
|
|
time.sleep(5)
|
|
|
|
s.sendall(b'M9\n')
|
|
time.sleep(1)
|
|
s.close()
|
|
|
|
d, u = temps()
|
|
print()
|
|
print('checks run: %d over %.0f min' % (len(verdicts), minutes))
|
|
if verdicts:
|
|
rises = [v[1] for v in verdicts]
|
|
print('rise values: min=%.2f max=%.2f mean=%.2f (threshold 13.7)'
|
|
% (min(rises), max(rises), sum(rises) / len(rises)))
|
|
print('false faults: %d' % sum(1 for v in verdicts if v[2]))
|
|
print('loop temperature: start %.2f -> end %.2f (%+.2f C), peak %.2f'
|
|
% (u0, u, u - u0, peak_up))
|
|
print('cadence: %.1f min between checks' % (minutes / max(1, len(verdicts))))
|