louchenyao

// clang++ two_or_three.cpp -O3 --std=c++17

// results:
// two  : 130.3 ns
// two+  : 131.0 ns
// three: 133.2 ns

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

louchenyao

// This is a C++ CUDA port of the Zipf Distribution generator from https://github.com/jonhoo/rust-zipf/blob/master/src/lib.rs, written in Rust.

#include <cassert>
#include <cstdio>
#include <cmath>
#include <curand_kernel.h>

namespace Zipf {
    
struct ZipfDist {

louchenyao

#include <cassert>
#include <cstdio>
#include <cmath>
#include <random>

int zipf(double alpha, int n, std::mt19937_64 &rng)
{
  static bool first = true;      // Static first time flag
  static double c = 0;          // Normalization constant
  static double *sum_probs;     // Pre-calculated sum of probabilities

louchenyao

#include <algorithm>
#include <cstdio>
#include <cstdlib>

template <typename T>
void cmp(T &a, T &b) {
    if (a > b) {
        std::swap(a, b);
    }
}

louchenyao

CREATE TABLE date_ (
	d_datekey          INTEGER,
	d_date             TEXT ENCODING DICT(32),
	d_dayofweek        TEXT ENCODING DICT(8),
	d_month            TEXT ENCODING DICT(8),
	d_year             SMALLINT,
	d_yearmonthnum     INTEGER,
	d_yearmonth        TEXT ENCODING DICT(16),
	d_daynuminweek     SMALLINT,
	d_daynuminmonth    SMALLINT,

louchenyao

// nvcc bench_seq.cu -O3 -gencode arch=compute_70,code=sm_70
// Result on V100:
// bench_seq        max throughput: 769.856 GiB/s
// bench_seq_unroll max throughput: 833.067 GiB/s

#include <iostream>

__device__
int64_t reduce(int64_t *buf, uint64_t s) {
    // The more effecient way is to reduce within the wrap firstly, but it's not the bottleneck

louchenyao

#! /usr/bin/env python3

import sys

# if the dns server of the wireguard are showed in the resolve.conf, then we skim off other servers to make sure the wireguard has the highest priority.
with open("/etc/resolv.conf") as f:
    old_resolv = f.read()
if "10.56.100.1" in old_resolv:
    with open("/etc/resolv.conf", "w") as f:
        f.write("# generated by /etc/NetworkManager/dispatcher.d/refresh_dns.py\nnameserver 10.56.100.1\n")

louchenyao

#cloud-config
users:
  - name: louchenyao
    groups: sudo
    shell: /bin/bash
    sudo: ['ALL=(ALL) NOPASSWD:ALL']
    ssh-authorized-keys:
      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCudAF5jQCs+HTk9ST93yyhXNUFtxldah+D9gU7xSKXW4c6xC1ZuVHZuBvrorArDUbXwByrB/bnjC8fQy4VH0JaS3qfjofroXnLWwHqQS4RC6N1H20EYm5+fsMu0GzzbgoCJOO99QT85UghN661iPzLd7gCdc96O/AiYmDliBlsYCMVblcHkD2D9VTzeKYKmCDjl4d1kjMBdK4H8xbzpbvrhRO5Xtexm+D5foH/elB7aB3CtoCSaHl+GHFOQWidI9MIwVNlYj0i+97fYbhk0V0dir3DuIaHHy5h2PCm0ruoeESKp2e0UirEH8NwkHS/dbiC4UlrAvSHFetSJdfEabMl louchenyao

runcmd:

louchenyao

#!/usr/bin/env python3
import subprocess

delay = 4

def ifstat():
    result = subprocess.check_output(["ifstat", str(delay), "1"]).decode()
    lines = result.splitlines()

    devs = lines[0].split()

louchenyao

#! /usr/bin/env python3

import requests
import subprocess
import time

USER = "USERNAME"
MD5 = "YOUR_PASSOWRD_MD5" # echo -n "password" |  md5

AUTH4 = "https://auth4.tsinghua.edu.cn/do_login.php?action=login&username=%s&password={MD5_HEX}%s&ac_id=1" % (USER, MD5)