azat

// Written with ChatGPT
#include <iostream>
#include <chrono>
#include <format>
#include <print>
#include <fmt/core.h>
#include <fmt/format.h>
#include <fmt/chrono.h>
#include <fmt/ranges.h>

azat

2024.12.10 14:13:33.100758 [ 3466 ] {b0c2bae7-e930-484d-9a98-26d972c8a985} <Trace> PushingToViews: Pushing (sequentially) from default.t_null (97ff26c2-3608-4b4b-b9a9-41696dd3f1a1) to default.t_mv (6ce3ce80-e1b0-4986-a79f-6c318399a8a6) took 21719 ms.
2024.12.10 14:13:33.100823 [ 3466 ] {} <Error> ThreadStatus: Untracked memory left: -96.00 B
2024.12.10 14:13:33.100969 [ 3135 ] {} <Trace> BaseDaemon: Received signal 6
2024.12.10 14:13:33.101277 [ 13793 ] {} <Fatal> BaseDaemon: ########## Short fault info ############
2024.12.10 14:13:33.101325 [ 13793 ] {} <Fatal> BaseDaemon: (version 24.12.1.1, build id: FBBF1E9C30254289BBFDF63093B967C2508ACB4C, git hash: 423da86c3064580c77679684d61b2b9d73da756f, architecture: x86_64) (from thread 3466) Received signal 6
2024.12.10 14:13:33.101344 [ 13793 ] {} <Fatal> BaseDaemon: Signal description: Aborted
2024.12.10 14:13:33.101351 [ 13793 ] {} <Fatal> BaseDaemon:
2024.12.10 14:13:33.101370 [ 13793 ] {} <Fatal> BaseDaemon: Stack trace: 0x000000000c16f4ed 0x000000000c42cafc 

azat

import os
import pyinotify


def get_current_memory_cgroup_path():
    try:
        with open("/proc/self/cgroup", "r") as f:
            for line in f:
                parts = line.strip().split(":")
                if len(parts) == 3 and parts[1] == "":

azat

#!/usr/bin/env python3

import matplotlib.pyplot as plt


def hashsocket_1(fd):
    return fd


def hashsocket_2(fd):

azat

#include <atomic>
#include <bits/types/clockid_t.h>
#include <cstdint>
#include <cstdlib>
#include <ctime>
#include <cerrno>
#include <iostream>
#include <list>
#include <random>
#include <sched.h>

azat

#!/usr/bin/env bash

# Measure overhead of fsync_part_directory for SELECTs from MergeTree/ReplicatedMergeTree (due to rename under lock)
# Refs: https://github.com/ClickHouse/ClickHouse/pull/64955

set -e

bin=$1 && shift
id=$BASHPID

azat

#!/usr/bin/env bash

# This is wrapper for faster addr2line, that is required for "perf --call-graph dwarf"
# NOTE: since v6.3 perf supports specifying addr2line and supports LLVM so it is not required there

# stdbuf is important here to avoid buffering, otherwise perf will stuck
stdbuf -o0 -i0 sed -e 's/,//' -e 's/^$/ffffffffffffff/' | llvm-addr2line "$@"

azat

#include <boost/smart_ptr/detail/spinlock.hpp>
#include <cstdint>
#include <cstring>
#include <cassert>
#include <iostream>
#include <list>
#include <mutex>
#include <optional>
#include <shared_mutex>
#include <thread>

azat

$ lscpu -J | jq '.lscpu.[] | select(.field == "Model name:").data' -r
AMD Ryzen Threadripper PRO 5975WX 32-Cores
$ musl-clang -static -O3 -o test-syscalls test-syscalls.cpp
$ ldd test-syscalls
        not a dynamic executable
$ ./test-syscalls
gettid: 48735.848us, 20518777.061 cps, 48.736 ns per call
clock_gettime (VDSO): 20660.516us, 48401501.686 cps, 20.661 ns per call
nothing_indirect_call: 0.020us, 50000000000000.000 cps, 0.000 ns per call
nothing: 0.020us, 50000000000000.000 cps, 0.000 ns per call

azat

#include <cstdint>
#include <ctime>
#include <cerrno>
#include <iostream>
#include <utility>

uint64_t now_ns(clockid_t clock)
{
    struct timespec ts;
    clock_gettime(clock, &ts);