Andrei-Pozolotin

RE: micropython/micropython#7015

GIST: https://gist.github.com/Andrei-Pozolotin/c4b3dd041efe53cfb92cfb4de9c67267

Here is a working experimental implementation. Basic approach is:

• use piecewise interpolation for stepper motor pulse profile
• persist interpolation segments once, inside esp32.RMT.items store
• start sending pulses from items store with rmt.h | rmt_set_clk_div() and rmt.h | rmt_write_items()
• continue sending by switching between pulse patterns with rmt.h | rmt_register_tx_end_callback() system ISR

Andrei-Pozolotin

original question

https://stats.stackexchange.com/questions/526581/expectation-of-maximum-and-minimum-of-partial-sums-of-normal-random-variables

Andrei-Pozolotin

//
// https://github.com/bogde/HX711
//
// sensor setup:
// * 5V supply (from nano)
// * 128 gain (library config)
// * +-20 mV input range (derived from gain)
// * int32_t output range (library convention)
// * 80 Hz (12.5 ms) sample rate (jumper on board)
//

Andrei-Pozolotin

"""
"""

import tester
import logging

from logging.config import fileConfig

from sqlalchemy import pool
from sqlalchemy import engine_from_config

Andrei-Pozolotin

"""
robust cluster connection pool
"""

import asyncio
import logging
from contextvars import ContextVar
from typing import Awaitable
from typing import List
from typing import Mapping

Andrei-Pozolotin

master nice=0
worker index=2 nice=19
worker index=1 nice=19
worker index=3 nice=19
worker index=4 nice=19
worker index=5 nice=19
worker index=6 nice=19
worker index=7 nice=19
worker index=9 nice=19
worker index=8 nice=19

Andrei-Pozolotin

master nice=0
worker index=1 nice=19
worker index=2 nice=19
worker index=3 nice=19
worker index=4 nice=19
worker index=5 nice=19
worker index=6 nice=19
worker index=7 nice=19
worker index=8 nice=19
worker index=9 nice=19

Andrei-Pozolotin

--- session=0 ---
count=100000 time_diff=0.179 time_unit=1 micro
--- session=1 ---
count=100000 time_diff=0.168 time_unit=1 micro
--- session=2 ---
count=100000 time_diff=0.168 time_unit=1 micro

Andrei-Pozolotin

--- session=0 ---
count=100000 time_diff=2.300 time_unit=23 micro
--- session=1 ---
count=100000 time_diff=2.262 time_unit=22 micro
--- session=2 ---
count=100000 time_diff=2.145 time_unit=21 micro

Andrei-Pozolotin

https://github.com/joerick/pyinstrument/issues/70