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Xenã«é–¢ã™ã‚‹halfrackã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (22)

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Xen-on-Nitro: AWS Nitro for Legacy Instances â€“ Perspectives
$halfrack$
halfrack 2021/12/01
Xen PV ã‚’ Nitro ã«ç§»æ¤ã—ã¦ã‚‹ã¨ã®ã“ã¨â€¦

virtualization

xen

nitro

aws

hardware
ãƒªãƒ³ã‚¯
gettimeofday(2) ã¯ VDSO ã«ã‚ˆã‚Šãƒ¦ãƒ¼ã‚¶ãƒ¼ç©ºé–“ã§å®Ÿè¡Œã•ã‚Œã‚‹ - ablog
gettimeofday(2) ã¯ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ãªã®ã§ã€å¤§é‡ã«ç™ºè¡Œã™ã‚‹ã¨%sysãŒä¸ŠãŒã‚‹ã¨æ€ã£ã¦ã„ãŸãŒã€VDSOã¨ã„ã†ä»•çµ„ã¿ã§ãƒ¦ãƒ¼ã‚¶ãƒ¼ç©ºé–“ã§å®Ÿè¡Œã•ã‚Œã‚‹ã®ã§%userãŒä¸ŠãŒã‚‹ã‚‰ã—ã„ã€‚æ™‚åˆ»å–å¾—ã¿ãŸã„ãªã¡ã‚‡ã£ã¨ã—ãŸå‡¦ç†ã§ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã‚’ç™ºè¡Œã—ã¦ã‚³ãƒ³ãƒ†ã‚ã‚¹ãƒˆã‚¹ã‚¤ãƒƒãƒã™ã‚‹ã®ã£ã¦ç„¡é§„ãŒå¤šã„ãªã£ã¦æ€ã£ã¦ãŸã‘ã©ã€ãã“ã¯ã¡ã‚ƒã‚“ã¨è€ƒãˆã‚‰ã‚Œã¦ã„ã‚‹ã‚“ã§ã™ãã€‚ å¤šãã®ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³è² è· (ç‰¹ã«ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ãŠã‚ˆã³è²¡å‹™ã‚µãƒ¼ãƒ“ã‚¹ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³) ã¯ gettimeofday ã¾ãŸã¯é¡žä¼¼ã®æ™‚é–“æ©Ÿèƒ½ã‚³ãƒ¼ãƒ«ã‚’éžå¸¸ã«é »ç¹ã«å®Ÿè¡Œã—ã¾ã™ã€‚ ã“ã®ã‚³ãƒ¼ãƒ«ã®åŠ¹çŽ‡æ€§ã‚’æœ€é©åŒ–ã™ã‚‹ã¨ã€ å¤§ããªåˆ©ç‚¹ãŒã‚ã‚Šã¾ã™ã€‚ VDSO (Virtual Dynamic Shared Object) ã¯ã€ ãƒ¦ãƒ¼ã‚¶ãƒ¼ã‚¹ãƒšãƒ¼ã‚¹ã®ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ãŒã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ¼ãƒ«ã‚ˆã‚Šã‚‚å°‘ãªã„ã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ã§ä¸€éƒ¨ã®ã‚«ãƒ¼ãƒãƒ«ã‚¢ã‚¯ã‚·ãƒ§ãƒ³ã‚’å®Ÿè¡Œã§ãã‚‹ã‚ˆã†ã«ã™ã‚‹å…±æœ‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã§ã™ã€‚ å¤šãã®å ´
$halfrack$
halfrack 2021/06/16
xen

kernel

linux
ãƒªãƒ³ã‚¯
Xen on Raspberry Pi 4 adventures
The Xen Project is excited to share that the Xen Hypervisor now runs on Raspberry Pi. This is an exciting step for both hobbyists and industries. Read more to learn about how Xen now runs on RPi and how to get started. Written by Stefano Stabellini and Roman Shaposhnik, originally posted on Linux.com Raspberry Pi (RPi) has been a key enabling device for the Arm community for years, given the low p
$halfrack$
halfrack 2020/10/02
Xen ãŒ RasPi4 ã«å¯¾å¿œã—ãŸã€‚çµ„ã¿è¾¼ã¿ã‚‰ã—ãã‚¢ãƒ‰ãƒ¬ã‚¹å‘¨ã‚Šå¤‰ãªã“ã¨ã—ã¦ã‚‹ãŒãã‚Œã«å¯¾å¿œã—ãŸã€ã¨ã€‚

xen

arm

linux
ãƒªãƒ³ã‚¯
Xen Project Spectre/Meltdown FAQ
Updated to v3 on Dec 12th! Googleâ€™s Project Zero announced several information leak vulnerabilities affecting all modern superscalar processors. Details can be found on their blog, and in the Xen Project Advisory 254. To help our users understand the impact and our next steps forward, we put together the following FAQ. Note that we will update the FAQ as new information surfaces. Changes since the
$halfrack$
halfrack 2019/04/09
xen

cpu

kernel

security
ãƒªãƒ³ã‚¯
https://d0.awsstatic.com/events/jp/2017/summit/slide/D4T2-5.pdf
$halfrack$
halfrack 2019/03/06
"Amazon EC2 Performance Deep Dive" 2017å¹´ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã«é–¢ã™ã‚‹è³‡æ–™

aws

xen
ãƒªãƒ³ã‚¯
Deep Dive on Amazon EC2 Instances (March 2017)
This document provides an overview of Amazon EC2 instance types and performance optimization best practices. It discusses the factors that go into choosing an EC2 instance, how instance performance is characterized, and how to optimize workloads through choices like instance type, operating system, and configuration settings. Specific tips are provided around topics like timekeeping, CPU credit mo
$halfrack$
halfrack 2017/06/09
EC2ã«ã¤ã„ã¦éžå…¬é–‹ã ã£ãŸæƒ…å ±ã¨ã‹è‰²ã€…ã‹ã‹ã‚Œã¦ã‚‹ / ä»®æƒ³åŒ–ã«è©³ã—ã‘ã‚Œã°ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚’å¼•ãå‡ºã™ãŸã‚ã®ãƒ’ãƒ³ãƒˆãŒå¤šæ•°

EC2

AWS

server

Xen

kernel
ãƒªãƒ³ã‚¯
ä»®æƒ³åŒ–åŸºç›¤Xenã®æ€§èƒ½è©•ä¾¡ / Performance evaluation of virtualization platform Xen
ç¬¬3å›žé–¢è¥¿ITç³»ã‚¤ãƒ³ãƒ•ãƒ©å‹‰å¼·ä¼šç™ºè¡¨è³‡æ–™
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halfrack 2016/07/04
ã‚¬ã‚¬ãƒƒã¨èª¿ã¹ãŸã‚„ã¤

Xen
ãƒªãƒ³ã‚¯
æŠ€è¡“æƒ…å ± | VA Linux Systems Japanæ ªå¼ä¼šç¤¾
å…¨ã¦ã®æŠ€è¡“æƒ…å ± VA Linuxã®"æŠ€è¡“åŠ›"ã®ä¸€éƒ¨ã‚’ã”ç´¹ä»‹ã—ã¾ã™ã€‚ ç‹¬è‡ªã®ç ”ç©¶ã‚„é–‹ç™ºã€æŠ€è¡“ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã§ç™ºè¡¨ã—ãŸæŠ€è¡“è³‡æ–™ãªã©ã‚’å…¬é–‹ã—ã¦ã„ã¾ã™ã€‚ OSS ã‚ãƒ¼ãƒ¯ãƒ¼ãƒ‰ã§çµžã‚Šè¾¼ã‚€ æ·±å±¤å¦ç¿’ ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ ãƒ—ãƒãƒˆã‚³ãƒ« Linux ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã‚³ãƒ³ãƒ†ãƒŠé–¢é€£ æ§‹æˆç®¡ç† ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ ä»®æƒ³åŒ– ã‚¯ãƒ©ã‚¦ãƒ‰ è² è·åˆ†æ•£ ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªž ãƒ—ãƒ©ãƒƒãƒˆãƒ•ã‚©ãƒ¼ãƒ ãƒ•ãƒ¬ãƒ¼ãƒ ãƒ¯ãƒ¼ã‚¯ æ·±å±¤å¦ç¿’ã™ã¹ã¦ Isaac Gym(22000ä»¶) ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã™ã¹ã¦ SmartNIC(11000ä»¶) RDMA(22000ä»¶) Ryu(10100ä»¶) OpenFlow(21100ä»¶) ãã®ä»–(20020ä»¶) ãƒ—ãƒãƒˆã‚³ãƒ«ã™ã¹ã¦ NFS(51301ä»¶) OpenLDAP(77000ä»¶) SNMP(11000ä»¶) OAuth(11000ä»¶) ãã®ä»–(00000ä»¶) Linuxã™ã¹ã¦ æ–°Linuxã‚«ãƒ¼ãƒãƒ«è§£èªå®¤(77000ä»¶) D
$halfrack$
halfrack 2016/06/15
Xen
ãƒªãƒ³ã‚¯
ç±³ã‚·ãƒˆãƒªãƒƒã‚¯ã‚¹ãŒXenAppã€XenDesktopãªã©ã«çµŒå–¶è³‡æºã‚’é›†ä¸ã—ã€ç¤¾å“¡ç´„1000äººã‚’å‰Šæ¸›ã€‚XenServerã‚„CloudStackã¯é‡ç‚¹è£½å“ã«æŒ™ãŒã‚‰ãš
ç±³ã‚·ãƒˆãƒªãƒƒã‚¯ã‚¹ãƒ»ã‚·ã‚¹ãƒ†ãƒ ã‚ºã¯2016å¹´ã¨2017å¹´ã«å‘ã‘ãŸçµŒå–¶æ–¹é‡ã‚’ç™ºè¡¨ã€‚ã‚¨ãƒ³ã‚¿ãƒ¼ãƒ—ãƒ©ã‚¤ã‚ºåˆ†é‡Žã®è£½å“ã¸çµŒå–¶è³‡æºã‚’é›†ä¸ã™ã‚‹ã¨ã¨ã‚‚ã«ã€ç´„1000äººã®ç¤¾å“¡ã‚’å‰Šæ¸›ã™ã‚‹ã“ã¨ã‚’æ˜Žã‚‰ã‹ã«ã—ã¾ã—ãŸã€‚ çµŒå–¶æ–¹é‡ã¯æ¬¡ã®3ã¤ã®æŸ±ã‹ã‚‰ãªã‚‹ã¨ç™ºè¡¨ã•ã‚Œã¦ã„ã¾ã™ã€‚ ã‚¨ãƒ³ã‚¿ãƒ¼ãƒ—ãƒ©ã‚¤ã‚ºå‘ã‘ã«ã‚»ã‚ãƒ¥ã‚¢ã‹ã¤é«˜ä¿¡é ¼ã§ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’ãƒ‡ãƒªãƒãƒªã™ã‚‹æ¬¡ã®è£½å“åˆ†é‡Žã«çµŒå–¶è³‡æºã‚’é›†ä¸ã™ã‚‹ã€‚XenAppã€XenDesktopã€XenMobileã€ShareFileã€NetScalerã€‚ã“ã‚Œã‚’å®Ÿç¾ã™ã‚‹ãŸã‚ã€ä»–ã®è£½å“ã¸ã®æŠ•è³‡ã‚’çµ‚äº†ã™ã‚‹ã‹ã€ã‚ã‚‹ã„ã¯æˆ¦ç•¥çš„ã«æŠ€è¡“ã‚’åˆ¥è£½å“ã¸ç§»è¡Œã™ã‚‹ãªã©ã‚’è¡Œã†ã€‚ çµŒå–¶è³‡æºã®é…åˆ†ã‚’è¦‹ç›´ã—ã€ç´„1000åã®ç¤¾å“¡ã‚„å¥‘ç´„ç¤¾å“¡ã‚’å‰Šæ¸›ã™ã‚‹ã€‚ã“ã“ã«ã¯GoTOè£½å“ç¾¤ã®ã‚¹ãƒ”ãƒ³ã‚ªãƒ•ã«é–¢é€£ã—ãŸäººå“¡ã¯å«ã¾ã‚Œãªã„ã€‚ GoToè£½å“ç¾¤ã‚’åˆ¥ä¼šç¤¾ã¸ã‚¹ãƒ”ãƒ³ã‚ªãƒ•ã™ã‚‹ï¼ˆæ³¨ï¼šGoTo Meetingãªã©ã€æ—¥æœ¬ã§ã¯å±•é–‹ã•ã‚Œã¦ã„ãªã„ï¼‰ã€‚ ã‚·ãƒˆãƒªãƒƒã‚¯ã‚¹ã¯ä»®æƒ³ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒ
$halfrack$
halfrack 2015/11/19
xen

server
ãƒªãƒ³ã‚¯
Xen Project Best Practices - Xen
Best Practices for Xen Project This wiki page lists various best practices for running Xen Project hypervisor. Information here applies to opensource Xen Project software from XenProject.org, not necessarily to XenServer or XCP. Paravirtualization (PV) or (hardware-assisted virtualization) HVM Paravirtualization used to be the recommended choice, because it required no hardware support and less em
$halfrack$
halfrack 2015/09/07
Xen

virtualization

Linux
ãƒªãƒ³ã‚¯
Xen Modes: What Color Is Your Xen?
Recent posts: 29 Oct 2024 Â» AI Flame Graphs 22 Jul 2024 Â» No More Blue Fridays 24 Mar 2024 Â» Linux Crisis Tools 17 Mar 2024 Â» The Return of the Frame Pointers 10 Mar 2024 Â» eBPF Documentary 28 Apr 2023 Â» eBPF Observability Tools Are Not Security Tools 01 Mar 2023 Â» USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon 17 Feb 2023 Â» USENIX SREcon APAC 2023: CFP 02 May 2022 Â» Brendan
$halfrack$
halfrack 2015/09/07
Xen

virtualization

Linux
ãƒªãƒ³ã‚¯
Linux PV on HVM
This document discusses using paravirtualized devices in Linux guests running on Xen in HVM (hardware virtual machine) mode. It offers the benefits of HVM like installing the same as native while also providing access to fast paravirtualized devices. Initial support added xenbus and grant table support while later enhancements added ballooning, spinlocks, and interrupt/MSI remapping. Benchmarks sh
$halfrack$
halfrack 2015/09/07
Xen

Linux

virtualization
ãƒªãƒ³ã‚¯
XSA-108 - Xen Security Advisories
Files advisory-108.txt (signed advisory file) xsa108.patch Advisory -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-7188 / XSA-108 version 4 Improper MSR range used for x2APIC emulation UPDATES IN VERSION 4 ==================== Public release. ISSUE DESCRIPTION ================= The MSR range specified for APIC use in the x2APIC access model spans 256 MSRs. Hypervisor
$halfrack$
halfrack 2014/10/01
"HVM guest can crash the host or read data relating to other guests or the hypervisor itself."

Xen

security

aws
ãƒªãƒ³ã‚¯
Xen Security Advisories
Advisories, publ icly released or pre-releasedAll times are in UTC. For general information about Xen and security see the Xen Project website and security policy. A JSON document listing advisories is also available. Advisory Public release Updated Version CVE(s) Title
$halfrack$
halfrack 2014/09/25
"XSA-108, 2014-10-01 12:00, none (yet) assigned, (Prereleased, but embargoed)"

Xen

security
ãƒªãƒ³ã‚¯
Improved Xen support in FreeBSD | Xen Project Blog
$halfrack$
halfrack 2014/03/24
"GENERIC kernel on i386 and amd64 now includes full Xen PVHVM support"

FreeBSD

Xen
ãƒªãƒ³ã‚¯
Xen Linux PV on HVM drivers - Xen
Xen Project PVHVM drivers for Linux HVM guests This page lists some resources about using optimized paravirtualized PVHVM drivers (also called PV-on-HVM drivers) with Xen Project fully virtualized HVM guests running (unmodified) Linux kernels. Xen Project PVHVM drivers completely bypass the Qemu emulation and provide much faster disk and network IO performance. Note that Xen Project PV (paravirtua
$halfrack$
halfrack 2013/07/29
config ä¾‹ãŒè¼‰ã£ã¦ã„ã‚‹

Xen

PVHVM

Linux

kernel
ãƒªãƒ³ã‚¯
Xen Project Software Overview - Xen
What is the Xen Project Hypervisor? The Xen Project hypervisor is an open-source type-1 or baremetal hypervisor, which makes it possible to run many instances of an operating system or indeed different operating systems in parallel on a single machine (or host). The Xen Project hypervisor is the only type-1 hypervisor that is available as open source. It is used as the basis for a number of differ
$halfrack$
halfrack 2013/07/29
Xen

Linux
ãƒªãƒ³ã‚¯
XenLinuxPVonHVMdrivers - Xen Wiki
Xen PVHVM drivers for Linux HVM guests This page lists some resources about using optimized paravirtualized PVHVM drivers (also called PV-on-HVM drivers) with Xen fully virtualized HVM guests running (unmodified) Linux kernels. Xen PVHVM drivers completely bypass the Qemu emulation and provide much faster disk- and network IO performance. Note that Xen PV (paravirtual) guests automatically use PV
$halfrack$
halfrack 2013/07/29
Xen

PVHVM

Linux
ãƒªãƒ³ã‚¯
Xen PV Performance Status and Optimization Opportunities
2. Disclaimers INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL'S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE
$halfrack$
halfrack 2013/05/27
Xen

Linux
ãƒªãƒ³ã‚¯
Linux PV on HVM
$halfrack$
halfrack 2013/05/27
cc2 ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã¨ã‹ã§ã‚‚ä½¿ã‚ã‚Œã¦ã„ã‚‹ PV on HVM ã®è©±ã€‚ KVM ãªã©ã¨ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ¯”è¼ƒãŒèˆˆå‘³æ·±ã„ã€‚

Linux

Xen

KVM
ãƒªãƒ³ã‚¯
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