ochaton

use strict;
use warnings;
use feature 'say';
use Module::CoreList;
use Pod::Simple::SimpleTree;
use List::Util qw(first);

# 1 - only standard level modules
# 2 - mostly all packages
# 3 - subpackages of packages

ochaton

Weird EV-loop behaviour

I've recently discovered weird behaviour of EV-loop timers.

First in Tarantool, and now in Perl libev.

Subj:

When asking EV-loop to sleep for 1ms, it does 1.2ms when requesting to sleep for 2ms, it does 2.4ms,

ochaton

#!/usr/bin/env tarantool

local json = require('json')
local cluster_config = require('internal.config.cluster_config')

local scalars = {}

scalars.string = {
    jsonschema = {
        type = 'string',

ochaton

use std::collections::HashMap;
use serde::{Deserialize, Serialize};

use tarantool::{self, session, tuple::Encode};
use mlua::Lua;

#[tarantool::proc]
fn add(left: i64, right: i64) -> i64 {
    left + right
}

ochaton

-- Tarantool 3.0.2-0-gf9e82c5 Darwin-arm64-RelWithDebInfo
local fiber = require 'fiber'
local clock = require 'clock'
local log   = require 'log'

box.cfg{checkpoint_count = 1,listen=3301}
box.ctl.promote()

require 'jit'.on()
fiber.top_enable()

ochaton

--[[
	cpu limit is like leaking bucket.

	we say that we want to limit this iterator to consume ≤10% cpu.

	Caller:
		- ev(), real()
			- gen_x(param_x, state_x)
		- ev(), real()

ochaton

local fiber = require 'fiber'
local clock = require 'clock'
local fun   = require 'fun'

require 'jit'.on()
fiber.top_enable()

local COLLECT_INTERVAL = 1
fiber.create(function()
	fiber.name("monitor")

ochaton

{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","additionalProperties":false,"properties":{"fiber":{"type":"object","additionalProperties":false,"properties":{"io_collect_interval":{"type":"number","default":null},"too_long_threshold":{"type":"number","default":0.5},"top":{"type":"object","additionalProperties":false,"properties":{"enabled":{"type":"boolean","default":false}}},"slice":{"type":"object","additionalProperties":false,"properties":{"err":{"type":"number","default":1},"warn":{"type":"number","default":0.5}}},"worker_pool_threads":{"type":"number","default":4}}},"wal":{"type":"object","additionalProperties":false,"properties":{"queue_max_size":{"type":"integer","default":16777216},"dir_rescan_delay":{"type":"number","default":2},"dir":{"type":"string","default":"var/lib/{{ instance_name }}"},"ext":{"type":"object","properties":{"spaces":{"type":"object","additionalProperties":{"type":"object","additionalProperties":false,"properties":{"old":{"type":"boolean","default":false

ochaton

require 'compat'.json_escape_forward_slash = 'new'

local log = require 'log'
local json = require 'json'
local netbox = require 'net.box'
local router = netbox.connect('127.0.0.1:4401')

log.info("call_raw: %s", json.encode(router:call('call_raw')))
log.info("call_noraw: %s", json.encode(router:call('call_noraw')))
--[[

ochaton

tarantool> require'tarantool'
---
- build: &0
    target: Darwin-arm64-Release
    options: cmake . -DCMAKE_INSTALL_PREFIX=/opt/homebrew/Cellar/tarantool/2.11.0_1
      -DENABLE_BACKTRACE=TRUE
    linking: dynamic
    mod_format: dylib
    flags: ' -fexceptions -funwind-tables -fasynchronous-unwind-tables -fno-common
      -fopenmp -Wformat -Wformat-security -Werror=format-security -fstack-protector-strong