Comparison of platform virtual machines. Platform virtualization software, specifically emulators and hypervisors, are software packages that emulate the whole physical computer machine, often providing multiple virtual machines on one physical platform. The table below compares basic information about platform virtualization hypervisors. General[edit] Features[edit] ^ Providing any virtual environment usually requires some overhead of some type or another. Native usually means that the virtualization technique does not do any CPU level virtualization (like Bochs), which executes code more slowly than when it is directly executed by a CPU.
Some other products such as VMWare and Virtual PC use similar approaches to Bochs and QEMU, however they use a number of advanced techniques to shortcut most of the calls directly to the CPU (similar to the process that JIT compiler uses) to bring the speed to near native in most cases. Image type compatibility[edit] Other features[edit] Restrictions[edit] Note: No limit means no enforced limit. Www.redhat.com/rhecm/rest-rhecm/jcr/repository/collaboration/jcr:system/jcr:versionStorage/5e7884ed7f00000102c317385572f1b1/1/jcr:frozenNode/rh:pdfFile.pdf. QEMU Monitor Protocol, QMP, QEMU Guest Agent, qemu-ga - qemu, kvm, xen & libvirt. (Link zu dieser Seite als [[QEMU-KVM-Buch/ Anhang/ QMP]]) <<<|###| >>> | English [bearbeiten] QMP-Befehle Das QEMU Monitor Protocol (siehe ist ein auf JASON ( basierendes Management Interface, welches Applikationen die Kommunikation mit der QEMU-Instanz ermöglicht.
JASON (JavaScript Object Notation) ist ein Datenformat in einer für Maschinen einfach zu lesenden Textform. Das heißt, die Kommunikation mit dem QEMU-Monitor erfolgt über JavaScript-Dokumente. Mit der Option -qmp erfolgt die Umleitung auf ein Device. Die Wirkungen der QMP-Befehle entsprechen meist denen der QEMU-Monitor-Befehle. -> Eingabe durch den Client <- Antwort des Servers [bearbeiten] Regelmäßige Befehle In den nachfolgenden Beispielen stellen die Antworten des Server jeweils erfolgreiche Befehlsausführungen dar.
[bearbeiten] quit Beendet die Instanz. Beispiel: [bearbeiten] eject Wirft ein Wechselmedium (CD/DVD, Diskette) aus. force device [bearbeiten] change target arg filename driver bus. Comparison of platform virtual machines. Virtual Machine Manager. x86 virtualization. In computing, x86 virtualization refers to hardware virtualization for the x86 architecture. It allows multiple operating systems to simultaneously share x86 processor resources in a safe and efficient manner. In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of virtualization support while attaining reasonable performance. In 2006, both Intel (VT-x) and AMD (AMD-V) introduced limited hardware virtualization support that allowed for simpler virtualization software but offered very little speed benefits.[1] Greater hardware support, that allowed for substantial speed improvements, came with later processor models.
Software-based virtualization[edit] The following discussion focuses only on virtualization of protected mode of the x86 architecture. Three techniques made virtualization of protected mode possible: Hardware-assisted virtualization[edit] Processor[edit] Virtual 8086 mode[edit] Chipset[edit] See also[edit] oVirt Project | The Open Source Infrastructure and Management Virtualization Platform. Stacklet | Images And Templates For Xen, KVM, VMWare, Solus and More. Virtuatopia.