AlacrityVM - A Brief Introduction Zhang Le Technical Support Engineer
[email protected]
Overview
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Me
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Purpose
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Background
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About
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Status
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Participate
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FAQ
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Me
Me
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Zhang Le
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27 years old
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Technical support engineer of Novell
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Core member and regular speaker of SZLUG
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Developer of Gentoo Linux
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http://zhangle.is-a-geek.org
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Purpose
Purpose
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To "briefly" intrduce AlacrityVM
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Make the community aware of its existence
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Attract potential developers
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Boost company public image
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Background
Background
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How virtualization works
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KVM
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Problems
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How virtualization works
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Hardware
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Hypervisor
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Virtual machines
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KVM
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Turn Linux kernel into a hypervisor by loading a kernel module
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/dev/kvm
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Each VM has its own address space
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Benefit from changes to standard kernel
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Problems
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I/O device virtualized by QEMU
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Requires multiple passes to perform a single I/O
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Performance degradation by tangible metrics as throughput and latency
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Existing attempt to solve this problem does not perform well enough
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About
About •
Definition –
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What it is –
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A hypervisor based on the Linux KVM project which aims to serve a high-performance niche, such as required for HPC and Real-Time workloads in the Data-Center.
Virtual bus –
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Alacrity - (n) liveliness, promptness
The underlying technology it is built upon
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Virtual Bus •
A Linux-kernel based virtual IO resource container technology
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Declare virtualized device models directly within a host kernel that can be uniformly accessed from a variety of environments, such as KVM, userspace, lguest, Xen, etc.
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The goal is to reduce overhead while still preserving proper isolation to achieve maximum throughput and latency from your IO subsystem.
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Virtual Bus (continued)
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Status
Status
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Still in early stage
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Based on KVM
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A working design, including hypervios, linux-guest, accelerated networking
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Will expand into accelerated disk I/O, IPC, real-time extensions and accelerated MS Windows support
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Work towards upstream acceptance
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Result
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Result
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Participate
Participate •
Downloads –
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https://sourceforge.net/projects/alacrityvm/files/
Git sources –
git://git.kernel.org/pub/scm/linux/kernel/git/ghaskins/alacrityvm /linux-2.6.git
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git://git.kernel.org/pub/scm/linux/kernel/git/ghaskins/alacrityvm /userspace.git
© Novell Inc. All rights reserved
Participate (continued) •
Example –
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http://developer.novell.com/wiki/index.php/AlacrityVMEnetHow to
Mailing list –
https://lists.sourceforge.net/lists/listinfo/alacrityvm-users
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https://lists.sourceforge.net/lists/listinfo/alacrityvm-devel
© Novell Inc. All rights reserved
FAQ
FAQ •
Is it a fork of KVM –
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No
AlacrityVM consists primarily of VBUS code. Why create a new project? –
VBUS is a general infrastructure solution
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Create KVM specific enhancement
How does this compare to virtio? –
Virtio compatible with AlacrityVM, because it is device level mechanism, while Vbus is a bus level mechanism
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You can continue using virtio
© Novell Inc. All rights reserved
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