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Ryota Ozaki ozaki-r

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  • Tokyo, Japan
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@ozaki-r
ozaki-r / gist:356439eac313eb0fbf1afae54942587b
Last active February 3, 2023 06:25
詳解システム・パフォーマンス　差分
まえがき
1章　イントロダクション
1.1　システムパフォーマンス
1.2　職種
1.3　作業
1.4　分析の視点
1.5　パフォーマンスエンジニアリングの難しさと面白さ
1.5.1　主観的な性質
1.5.2　複雑さ
@ozaki-r
ozaki-r / get_likes.py
Last active January 1, 2024 14:44
Get items from the playlist of Your Likes via YouTube Data API (See https://developers.google.com/youtube/v3/quickstart/python?hl=ja)
#!/usr/bin/python
import httplib2
import os
import sys
import json
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
@ozaki-r
ozaki-r / setup_veth.sh
Created September 19, 2021 20:18
ip link add name tx-veth0 type veth peer name tx-veth1
ip netns add af_xdp
ip link set tx-veth1 netns af_xdp
ip link add name rx-veth0 type veth peer name rx-veth1
ip link set rx-veth1 netns af_xdp
ip link set up dev tx-veth0
ip link set up dev rx-veth0
ip a add 10.0.1.2/24 dev tx-veth0
ip a add 10.0.2.2/24 dev rx-veth0
@ozaki-r
ozaki-r / setup.md
Last active January 8, 2021 08:19
Setups for a newly created VM on GCP

Fill $vmname and $username with yours.

  • gcloud compute ssh $vmname -- tmux -u new-session -A -s main
  • git clone https://github.com/ozaki-r/dotfiles
    • cd dotfiles
    • sh setup.sh
  • sudo apt install zsh
  • sudo passwd $username
  • chsh
    • /usr/bin/zsh
@ozaki-r
ozaki-r / gce_idle_suspend.sh
Last active June 3, 2021 20:31
GCE: automatically suspend the underlying VM on idle
#!/bin/sh
if [ $# -lt 2 ]; then
echo "usage: $0 name zone [time]"
exit 1
fi
# TODO: check if authenticated and suggest 'gcloud auth login'
name=$1
@ozaki-r
ozaki-r / sys-papers.md
Last active April 20, 2021 00:34
システム系論文紹介のまとめ
@ozaki-r
ozaki-r / restore-vmstat.diff
Last active August 23, 2019 07:03
workaround rumphijck for vmstat
commit d8aa69b7abe780ed6778e23e3f68713f71d13d99
Author: Ryota Ozaki <ozaki-r@iij.ad.jp>
Date: Fri Aug 23 13:33:58 2019 +0900
Restore vmstat
diff --git a/tests/net/net_common.sh b/tests/net/net_common.sh
index 8b1790f9c5a..e224047b76c 100644
--- a/tests/net/net_common.sh
+++ b/tests/net/net_common.sh
@ozaki-r
ozaki-r / fix-tcp-panic.diff
Created August 13, 2019 03:29
fix https://syzkaller.appspot.com/bug?id=910c84220f7ed55f124919cf54980c617e5fed76
commit a0b8622b34a7a865eee497dbb8e844f0e39383dd
Author: Ryota Ozaki <ozaki.ryota@gmail.com>
Date: Tue Aug 13 12:04:03 2019 +0900
fix tcp panic
diff --git a/sys/kern/uipc_socket.c b/sys/kern/uipc_socket.c
index c89dc0f4d57..fc0a7a3fd9d 100644
--- a/sys/kern/uipc_socket.c
+++ b/sys/kern/uipc_socket.c
@ozaki-r
ozaki-r / KVM
Last active December 28, 2016 04:46
# $NetBSD: GENERIC,v 1.386 2014/04/21 16:35:38 chs Exp $
#
# GENERIC machine description file
#
# This machine description file is used to generate the default NetBSD
# kernel. The generic kernel does not include all options, subsystems
# and device drivers, but should be useful for most applications.
#
# The machine description file can be customised for your specific
# machine to reduce the kernel size and improve its performance.
@ozaki-r
ozaki-r / gist:38293b7e40015f60287e
Created March 12, 2016 07:36
demo
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<title></title>
<meta name="Generator" content="Cocoa HTML Writer">
<meta name="CocoaVersion" content="1404.34">
<style type="text/css">
p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 14.0px; font: 12.0px Courier; color: #000000; -webkit-text-stroke: #000000}