search for: vmi

Displaying 20 results from an estimated 340 matches for "vmi".

2009 Sep 18
3
Paravirtualization on VMware's Platform [VMI].
Hi, We ran a few experiments to compare performance of VMware's paravirtualization technique (VMI) and hardware MMU technologies (HWMMU) on VMware's hypervisor. To give some background, VMI is VMware's paravirtualization specification which tries to optimize CPU and MMU operations of the guest operating system. For more information take a look at this http://www.vmware.com/interfaces/p...
2009 Sep 18
3
Paravirtualization on VMware's Platform [VMI].
Hi, We ran a few experiments to compare performance of VMware's paravirtualization technique (VMI) and hardware MMU technologies (HWMMU) on VMware's hypervisor. To give some background, VMI is VMware's paravirtualization specification which tries to optimize CPU and MMU operations of the guest operating system. For more information take a look at this http://www.vmware.com/interfaces/p...
2008 Jul 10
1
CentOS 5.2 VMI support
I'm using VMWare Server 2 RC1 to on top of CentOS 5.2 x86_64 running a CentOS 5.2 i386 guest. I have enabled VMI in VMware, so I guess it won't let me install if VMI wasn't available in the kernel? How do I know whether VMI is supported/enabled and what performance benefits can I expect from it? I'm still not getting full hard drive speeds (only getting about 1/3 when using hdparm -t ). Ru...
2007 Apr 18
1
[RFC, PATCH 21/24] i386 Vmi proc node
Add a /proc node for the VMI sub-arch, which gives information on the VMI ROM detected using /proc/vmi/info and a list of kernel annotations in /proc/vmi/annotations. The timing information is VMware specific, and should probably be put into a separate /proc node (and a separate patch for our internal use). Signed-off-by: Za...
2007 Apr 18
1
[RFC, PATCH 21/24] i386 Vmi proc node
Add a /proc node for the VMI sub-arch, which gives information on the VMI ROM detected using /proc/vmi/info and a list of kernel annotations in /proc/vmi/annotations. The timing information is VMware specific, and should probably be put into a separate /proc node (and a separate patch for our internal use). Signed-off-by: Za...
2007 Apr 18
0
[RFC, PATCH 6/24] i386 Vmi magic fixes
Linker changes to add the VMI MACH_TEXT area into the kernel text section. This area layout is heavily influenced by magic to overlap exactly with the 32-byte VMI ROM entry points, allowing the kernel to copy the VMI ROM over the native section. As use of magic is on the decline, this approach is being phased out in favor of...
2007 Apr 18
0
[RFC, PATCH 6/24] i386 Vmi magic fixes
Linker changes to add the VMI MACH_TEXT area into the kernel text section. This area layout is heavily influenced by magic to overlap exactly with the 32-byte VMI ROM entry points, allowing the kernel to copy the VMI ROM over the native section. As use of magic is on the decline, this approach is being phased out in favor of...
2007 Apr 18
7
[RFC, PATCH 5/24] i386 Vmi code patching
The VMI ROM detection and code patching mechanism is illustrated in setup.c. There ROM is a binary block published by the hypervisor, and and there are certainly implications of this. ROMs certainly have a history of being proprietary, very differently licensed pieces of software, and mostly under non-fr...
2007 Apr 18
7
[RFC, PATCH 5/24] i386 Vmi code patching
The VMI ROM detection and code patching mechanism is illustrated in setup.c. There ROM is a binary block published by the hypervisor, and and there are certainly implications of this. ROMs certainly have a history of being proprietary, very differently licensed pieces of software, and mostly under non-fr...
2010 Aug 23
1
Removing VMI kernel support from 2.6.37
Hi Peter, Removal of VMI(VMware's para-virtualization technique) is scheduled for 2.6.37, I was wondering what would be the right time frame for submitting a patch which does that. Does the x86-tip tree have any next branch where we can park this patch ? Below is the patch for your reference which just removes VMI spe...
2010 Aug 23
1
Removing VMI kernel support from 2.6.37
Hi Peter, Removal of VMI(VMware's para-virtualization technique) is scheduled for 2.6.37, I was wondering what would be the right time frame for submitting a patch which does that. Does the x86-tip tree have any next branch where we can park this patch ? Below is the patch for your reference which just removes VMI spe...
2007 Apr 18
4
[RFC, PATCH 3/24] i386 Vmi interface definition
Master definition of VMI interface, including calls, constants, and interface version. Signed-off-by: Zachary Amsden <zach@vmware.com> Index: linux-2.6.16-rc5/include/asm-i386/mach-vmi/paravirtualInterface.h =================================================================== --- linux-2.6.16-rc5.orig/include/asm-i3...
2007 Apr 18
4
[RFC, PATCH 3/24] i386 Vmi interface definition
Master definition of VMI interface, including calls, constants, and interface version. Signed-off-by: Zachary Amsden <zach@vmware.com> Index: linux-2.6.16-rc5/include/asm-i386/mach-vmi/paravirtualInterface.h =================================================================== --- linux-2.6.16-rc5.orig/include/asm-i3...
2007 Apr 18
3
[RFC, PATCH 4/24] i386 Vmi inline implementation
Macros to use VMI calls from assembly and C languages are introduced. The macros are quite complex, but the end result is rather impressive. The result is that when compiling a VMI kernel, the native code is emitted inline, with no function call overhead, and some wiggle room for register allocation. The hypervisor...
2007 Apr 18
3
[RFC, PATCH 4/24] i386 Vmi inline implementation
Macros to use VMI calls from assembly and C languages are introduced. The macros are quite complex, but the end result is rather impressive. The result is that when compiling a VMI kernel, the native code is emitted inline, with no function call overhead, and some wiggle room for register allocation. The hypervisor...
2007 Apr 18
0
[RFC, PATCH 23/24] i386 Vmi timer patch
In a virtualized environment, virtual machines will time share the system with each other and with other processes running on the host system. Therefore, a VM's virtual CPUs (VCPUs) will be executing on the host's physical CPUs (pcpus) for only some portion of time. The VMI exposes a paravirtual view of time to the guest operating systems so that they may operate more effectively in a virtual environment. The interface also provides a way for the VCPUs to set alarms in this paravirtual view of time. A VCPU is always in one of three states: running, halted, or ready....
2007 Apr 18
0
[RFC, PATCH 23/24] i386 Vmi timer patch
In a virtualized environment, virtual machines will time share the system with each other and with other processes running on the host system. Therefore, a VM's virtual CPUs (VCPUs) will be executing on the host's physical CPUs (pcpus) for only some portion of time. The VMI exposes a paravirtual view of time to the guest operating systems so that they may operate more effectively in a virtual environment. The interface also provides a way for the VCPUs to set alarms in this paravirtual view of time. A VCPU is always in one of three states: running, halted, or ready....
2007 Apr 18
0
[PATCH 8/9] Vmi apic ops.diff
Use para_fill instead of directly setting the APIC ops to the result of the vmi_get_function call - this allows one to implement a VMI ROM without implementing APIC functions, just using the native APIC functions. While doing this, I realized that there is a lot more cleanup that should have been done. Basically, we should never assume that the ROM implements a specific set...
2007 Apr 18
0
[PATCH 8/9] Vmi apic ops.diff
Use para_fill instead of directly setting the APIC ops to the result of the vmi_get_function call - this allows one to implement a VMI ROM without implementing APIC functions, just using the native APIC functions. While doing this, I realized that there is a lot more cleanup that should have been done. Basically, we should never assume that the ROM implements a specific set...
2007 Apr 18
1
[PATCH] 2.6.21 - VMI logic error
So there is a logic error that would prevent us from ever using NOP = relocations, thus stopping any unnecessary callouts into a VMI ROM. It = doesn't affect us so much, but could conceivably affect open source = implementations of a VMI ROM in the future. It is not absolutely = critical, but it would be extremely nice to get it fixed in 2.6.21 so = there are no broken older kernels floating around that mandate having...