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delta_calibrate: Perform coordinate descent in a background process

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Run the coordinate descent in a background process so that the main
thread does not block.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-10-15 18:52:28 -04:00
parent 46355f903e
commit 368703fd78
2 changed files with 30 additions and 8 deletions
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29
klippy/mathutil.py
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@ -3,7 +3,7 @@
# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import math, logging
import math, logging, multiprocessing
######################################################################
@ -45,6 +45,33 @@ def coordinate_descent(adj_params, params, error_func):
logging.info("Coordinate descent best_err: %s rounds: %d", best_err, rounds)
return params
# Helper to run the coordinate descent function in a background
# process so that it does not block the main thread.
def background_coordinate_descent(printer, adj_params, params, error_func):
parent_conn, child_conn = multiprocessing.Pipe()
def wrapper():
res = coordinate_descent(adj_params, params, error_func)
child_conn.send(res)
child_conn.close()
# Start a process to perform the calculation
calc_proc = multiprocessing.Process(target=wrapper)
calc_proc.daemon = True
calc_proc.start()
# Wait for the process to finish
reactor = printer.get_reactor()
gcode = printer.lookup_object("gcode")
eventtime = last_report_time = reactor.monotonic()
while calc_proc.is_alive():
if eventtime > last_report_time + 5.:
last_report_time = eventtime
gcode.respond_info("Working on calibration...")
eventtime = reactor.pause(eventtime + .1)
# Return results
res = parent_conn.recv()
calc_proc.join()
parent_conn.close()
return res
######################################################################
# Trilateration