LinuxCon 2015 Linux Kernel Networking Walkthrough
This presentation features a walk through the Linux kernel networking stack for users and developers. It will cover insights into both, existing essential networking features and recent developments and will show how to use them properly. Our starting point is the network card driver as it feeds a packet into the stack. We will follow the packet as it traverses through various subsystems such as p
Linux packet-forwarding
2. ã¯ã˜ã‚ã¾ã—ã¦ï¼Ÿ • 新潟県三æ¡å¸‚ã«ã‚る地域 ISP 有é™ä¼šç¤¾éŠ€åº§å ‚ã§ã‚µãƒ¼ãƒç®¡ç†ã‚„ãƒãƒƒãƒˆ ワーク管ç†ã‚’ã—ã¦ã„ã¾ã™ • 弊社ã§ã¯ä¸Šæµ ISP(OCN ã•ã‚“ã¨æ–°æ½ŸçœŒå†…ã® ISP) ã‚„ Echigo-IX(新潟県 内ã®åœ°åŸŸ IX) ã¨ã®æŽ¥ç¶šã« Linux(Vyatta Core) を使ã£ã¦ BGP 接続を ã—ã¦ã„ã¾ã™ • 2010 å¹´é ƒã‹ã‚‰ Linux カーãƒãƒ«ã®ãƒ‘ケット転é€å‡¦ç†ã«ã¤ã„ã¦èª¿ã¹ InternetWeek ã§ç™ºè¡¨ã—ãŸã‚Šã—ã¦ã„ã¾ã—㟠• 趣味ã§ã¯ IETF ã§æ¨™æº–化ãŒé€²ã‚られã¦ã„ã‚‹ MAP(Mapping of Address and Port with Encapsulation) ã¨ã„ã†ãƒ—ãƒãƒˆã‚³ãƒ«ã‚’ Linux カーãƒãƒ«ã«å®Ÿè£…ã— Vyatta Core ã«çµ„ã¿è¾¼ã¿ ASAMAP ã¨ã„ã†åå‰ã§ オープンソースã§å…¬é–‹ã—ãŸã‚Šã—ã¦ã„ã¾ã™ 2 3. ASAMAP？ • IPv4 over
1.1. UEKã«ã¤ã„ã¦
2010å¹´9月ã«ã€ã‚ªãƒ©ã‚¯ãƒ«ç¤¾ã¯ã€Oracle Linux 5を使用ã—ãŸãƒ‡ãƒ—ãƒã‚¤ãƒ¡ãƒ³ãƒˆã«æŽ¨å¥¨ã•ã‚Œã‚‹ã‚«ãƒ¼ãƒãƒ«ã¨ã—ã¦Oracle Linux用ã®æ–°ã—ã„Unbreakable Enterprise Kernel (UEK)を公開ã—ã¾ã—ãŸã€‚Oracle Linux 5.5以é™ã‹ã‚‰ã€Red Hat互æ›ã‚«ãƒ¼ãƒãƒ«ã¾ãŸã¯UEKã®ã„ãšã‚Œã‹ã‚’使用ã§ãるよã†ã«ãªã‚Šã¾ã—ãŸã€‚Oracle Linux 5.6ã§ã€UEKã¯ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆãƒ»ã‚«ãƒ¼ãƒãƒ«ã«ãªã‚Šã¾ã—ãŸã€‚ UEK作æˆã®ä¸»ãªå‹•æ©Ÿã¯ã€ExadataãŠã‚ˆã³Exalogicã«ã‚ˆã£ã¦ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒªãƒ³ã‚°ã•ã‚ŒãŸã‚·ã‚¹ãƒ†ãƒ 用ã®é«˜æ€§èƒ½ãªæœ€æ–°ã®Linuxカーãƒãƒ«ã‚’æä¾›ã™ã‚‹ã“ã¨ã§ã—ãŸã€‚カーãƒãƒ«ã¯ã€CPUã®æ•°ã€ãƒ¡ãƒ¢ãƒªãƒ¼ãŠã‚ˆã³ã‚¤ãƒ³ãƒ•ã‚£ãƒ‹ãƒãƒ³ãƒ‰æŽ¥ç¶šã®å¢—åŠ ã«å¿œã˜ã¦ã‚¹ã‚±ãƒ¼ãƒªãƒ³ã‚°ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã—ãŸã€‚ オラクル社ã§ã¯ã€è² è·ã®é«˜ã„Oracleワークãƒãƒ¼ãƒ‰ã§é›†ä¸çš„ã«UEKをテストã—ã¦ãŠã‚Šã€UEKã‚’Oracleデ
Diving into the Linux Networking Stack, Part I | Beyond Syntax | Michael J. Schultz
This is the first part of a (planned) multi-part series on receiving a network packet on a modern Linux kernel. Have you ever wondered what happens when your Linux machine gets a packet from the network? I have, but most of the information I've seen is concerned with the 2.4.x kernel. For my own sake, I decided to take a walk through the Linux networking stack (using Linux kernel 2.6.37) and thoug
RSS対応NICãªã®ã«å‰²ã‚Šè¾¼ã¿å‡¦ç†ãŒè¤‡æ•°ã‚³ã‚¢ã«åˆ†æ•£ã—ãªã„…ã®ã¯irqbalanceãŒå‹•ã„ã¦ãªã‹ã£ãŸã‹ã‚‰ - 酒日記 ã¯ã¦ãªæ”¯åº—
タイトルãŒã™ã¹ã¦ã§ã”ã–ã„ã¾ã™ã€‚ NICã®å‰²ã‚Šè¾¼ã¿å‡¦ç†ãŒ1コアã«é›†ä¸ã—ã¦ã—ã¾ã„ã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã«ãªã£ã¦æ€§èƒ½ãŒå‡ºãªã„å ´åˆãŒã‚ã‚‹ã¨ã„ã†è©±ã¯æœ€è¿‘広ã知られã¦ã„ã‚‹ã¨æ€ã„ã¾ã™ã€‚ NICã®ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãƒ¬ãƒ™ãƒ«ã§å‰²ã‚Šè¾¼ã¿ã‚’分散ã—ã¦ãれる RSS(Receive Side Scaling) ã¨ã„ã†ä»•çµ„ã¿ãŒã‚ã‚Šã€ãれを利用ã™ã‚Œã°ç‰¹ã«ãªã«ã‚‚ã—ãªãã¦ã‚‚複数コアã«åˆ†æ•£ã•ã‚Œã‚‹ã¯ãšã€ã¨æ€ã£ã¦ã„ãŸã®ã§ã™ãŒã€ã©ã†ã‚‚特定ã®ãƒžã‚·ãƒ³ã§ãã†ãªã‚‰ãªã„。 # cat /proc/interrupts CPU0 CPU1 CPU2 (çœç•¥) CPU11 64: 1256214 0 0 ... 0 IR-PCI-MSI-edge eth1-0 65: 225711 0 0 0 IR-PCI-MSI-edge eth1-1 66: 402906 0 0 0 IR-PCI-MSI-edge eth1-2 67: 723539 0 0 0 IR-P
Receive-Side Scalingã«ã¤ã„ã¦ã®èª¿æŸ»ãƒ¡ãƒ¢ - syuu1228's blog
Kernel/VM Advent Calendar ４日目: Linuxã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“リティã«ã¤ã„㦠- ã‹ãƒ¼ãる・ã†ã‚›ã„ãˆã‚€ã«ã£ãã§æ›¸ã„ãŸReceive-Side Scalingã®è¨˜è¿°ãŒæœªã ç†è§£ãŒè¶³ã‚Šãšä¸æ£ç¢ºã ã¨æ€ã£ãŸã®ã§ã€èª¿ã¹ç›´ã—ã¦ã¿ã¦ã‚‹æ‰€ã€‚ Multi-queueãªNICã£ã¦ãªã« RPSæ案ã®ãƒ¡ãƒ¼ãƒ«ã«ã“ã‚“ãªäº‹ãŒæ›¸ã„ã¦ã‚る： This effectively emulates in software what a multi-queue NIC can provide, but is generic requiring no device support. è¦ç´„ã™ã‚‹ã¨ã€Œmulti-queue NICãŒæä¾›ã—ã¦ã„る機能をソフトウェアエミュレートã™ã‚‹ã®ãŒRPS〠→ã˜ã‚ƒã‚multi-queueãªNICã£ã¦ã©ã‚Œã§ã€ã©ã‚“ãªæ©Ÿèƒ½ã‚’æä¾›ã—ã¦ã‚‹ã‚“ã ã‚ã†ï¼Ÿ ãれらã—ã„NICを探ã—ã¦
Kernel/VM Advent Calendar ４日目: Linuxã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“リティã«ã¤ã„㦠- syuu1228's blog
ã€ãŠé¡˜ã„】ç§ã¯Linuxカーãƒãƒ«ã‚‚ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯å‘¨ã‚Šã‚‚ç´ äººã§ã™ã€‚ã“ã“ã«æ›¸ã„ã¦ã‚る事ã¯é–“é•ãˆã¦ã„ã‚‹å¯èƒ½æ€§ã‚‚ã‚ã‚‹ã®ã§ãŠã‹ã—ã„ãªã¨æ€ã£ãŸã‚‰ã™ã‹ã•ãšçªã£è¾¼ã‚“ã§ãã ã•ã„。宜ã—ããŠé¡˜ã„致ã—ã¾ã™ã€‚ 今回ã¯ã€ã“ã®è¨˜äº‹ã®å†…容を全é¢çš„ã«è¦‹ç›´ã—ã¦ã€å†åº¦Linuxã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ã®ã‚¹ã‚±ãƒ¼ãƒ©ãƒ“リティã«ã¤ã„ã¦ã¾ã¨ã‚よã†ã¨æ€ã„ã¾ã™ã€‚ 従æ¥ã®Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ï¼‹å¾“æ¥ã®ã‚·ãƒ³ã‚°ãƒ«ã‚ューNIC 以下ã®å›³ã¯å¾“æ¥ã®Linuxãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ã‚¿ãƒƒã‚¯ï¼‹å¾“æ¥ã®ã‚·ãƒ³ã‚°ãƒ«ã‚ューNICã§ã€ã‚るプãƒã‚»ã‚¹å®›ã®ãƒ‘ケットをå—ä¿¡ã—ã¦ã„る時ã®å‡¦ç†ã®æµã‚Œã‚’表ã—ã¦ã„る。フォワーディングã®å ´åˆã‚„プãƒãƒˆã‚³ãƒ«ã‚¹ã‚¿ãƒƒã‚¯å†…ã®å‡¦ç†ã¯å‰²æ„›ã—ãŸã€‚ プãƒã‚»ã‚¹ãŒã‚·ã‚¹ãƒ†ãƒ コールを発行ã—ã¦ã‹ã‚‰ã‚¹ãƒªãƒ¼ãƒ—ã™ã‚‹ã¾ã§ プãƒã‚»ã‚¹ã¯ã€ã‚·ã‚¹ãƒ†ãƒ コールを通ã—ã¦ã‚«ãƒ¼ãƒãƒ«ã«ãƒ‘ケットをå–ã‚Šã«è¡Œã。 パケットã¯ã‚½ã‚±ãƒƒãƒˆæ¯Žã®ãƒãƒƒãƒ•ã‚¡ã«è²¯ã¾ã‚‹ã‚ˆã†ã«ãªã£ã¦ã„ã‚‹ãŒã€ãƒãƒƒãƒ•ã‚¡ãŒç©ºã ã£ãŸã‚‰ãƒ—ãƒã‚»ã‚¹ã¯ãƒ‘ケ
1
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
{{#tags}}- {{label}}
{{/tags}}