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#!/usr/bin/env python3

# Made for: https://github.com/TheJJ/ceph-balancer/issues/68

"""
Compute the exact counts involved in the jj-balancer's 0-move situation.

Key discovery: pg_num = 2048 (not 512 as I initially assumed).
Verification: 12288 total shards / 6 (pool size) = 2048 PGs.
The -vvv log confirms: ideal_14T = 153.623 = 12288 / 1168.69 * 14.61089.

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#!/usr/bin/env python3

# This script outputs passwords that the Ubuntu Chromium Snap stores in plain text by default.
#
# It should also work for any other Chromium that uses `--password-store=basic` (which is what
# the Snap uses by default unless the user has manually connected it to a passowrd store backend).
# See
#     https://chromium.googlesource.com/chromium/src/+/1fbcd1d2fcab302f8593393135fe6253a963101f/docs/linux/password_storage.md
# It is a repro for Ubuntu bug:
#

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"""Minimal repro: torch.profiler CUDA events on worker threads get wrong thread IDs.

When `torch.profiler.profile()` is active and CUDA operations happen on
worker threads (e.g. from `ThreadPoolExecutor`), the exported Chrome trace
has CUDA runtime events (like `cudaLaunchKernel`) with `tid` values based
on `pthread_self()` instead of `gettid()` (Linux kernel TID).

This happens because `torch.profiler.profile()` registers `RecordFunction`
callbacks via `at::addThreadLocalCallback()`, so only the thread that
called `profile().__enter__()` gets callbacks. Kineto's

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-- Creates the table recording the current migration.

SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;

BEGIN;

-- Note: `create or replace function` cannot be run concurrently; postgres
--       will error with "tuple concurrently updated" when that happens.
--       That's why we wrap it in a transaction-level exclusive advisory lock.
--       See http://stackoverflow.com/questions/40525684/tuple-concurrently-updated-when-creating-functions-in-postgresql-pl-pgsql/44101303

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# This `firefox-vm.nix` builds a simple NixOS VM with XFCE and Firefox inside.
#
# Build and run it with:
#
#     nix-build '<nixpkgs/nixos>' -A vm -I nixos-config=./firefox-vm.nix
#     result/bin/run-nixos-vm
#
# Log in as "root" with empty password.
#
# To delete the VM state (storage):

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(bootloader) product:sunfish
(bootloader) serialno:17191JEC203691
(bootloader) variant:SM7 UFS
(bootloader) max-download-size:0x10000000
(bootloader) slot-suffixes:_a,_b
(bootloader) version-bootloader:s5-0.5-10252351
(bootloader) version-baseband:g7150-00112-230505-B-10075601
(bootloader) secure-boot:PRODUCTION
(bootloader) secure:yes
(bootloader) hw-revision:MP1.0

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{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.services.ceph-benaco;

  inherit (pkgs.callPackage ../helpers.nix {}) ensureUnitExists;
in

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# ./ghc-performance-categorizer.py ghci-v-output-1.txt --sort-by time

TASK                            time ms   mem MB
------------------------------------------------
systool:cpp                           4        2
systool:merge-objects                11        3
Simplify                             38       68
ByteCodeGen                          70      164
initializing                         72      119
systool:as                          175       68

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#! /usr/bin/env python3

# Moves contents of one directory tree into another, safely.

import argparse
import filecmp
import shlex
import sys

from dataclasses import dataclass

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// Demo of how mmap() affects VIRT, RES, SHR memory usage in Linux.
//
// A useful resource for more background:
// https://techtalk.intersec.com/2013/07/memory-part-2-understanding-process-memory/

// Required for:
// * `O_TMPFILE`
// * `fallocate()`
#define _GNU_SOURCE