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    • 9. 发明授权
    • Method and apparatus for generating a real address multiple virtual
address spaces of a storage
    • 用于生成存储器的真实地址多个虚拟地址空间的方法和装置
    • US4985828A
    • 1991-01-15
    • US156454
    • 1988-02-16
    • Naohiko ShimizuHideo Sawamoto
    • Naohiko ShimizuHideo Sawamoto
    • G06F12/10
    • G06F12/1036
    • A multiple virtual space control in a multiple virtual storage system having an address translation table used to translate a logical address to a real address, a control register for holding a start address of the address translation table or a space identifier (hereinafter represented by address translation table start address) and an address translation buffer containing a pair of logical address and real address and an address translation table start address for translating a logical address to a real address, in order to update the content of the control register to switch the virtual space. A group identifier comprising a plurality of bits for identifying an area common to a group of virtual spaces is added to an entry of the address translation table, an entry of the address translation buffer and the control register. When a logical address is to be translated to a real address, if there is an entry having a logical address and an address translation table start address equal to the memory request logical address and the address translation table start address of the control register, or an entry having a logical address and a group identifier equal to the memory request logical address and the group identifier of the control register, in the address translation buffer, the real address of the entry is rendered valid and used for memory access.
    • 具有用于将逻辑地址转换为实际地址的地址转换表的多虚拟存储系统中的多虚拟空间控制,用于保存地址转换表的起始地址的控制寄存器或空间标识符(以下由地址转换 表起始地址)和包含一对逻辑地址和实地址的地址转换缓冲器和用于将逻辑地址转换为实地址的地址转换表起始地址,以便更新控制寄存器的内容以切换虚拟空间 。 包括用于识别一组虚拟空间的区域的多个位的组标识符被添加到地址转换表的条目,地址转换缓冲器和控制寄存器的条目。 当将逻辑地址转换为实际地址时,如果存在具有等于存储器请求逻辑地址和控制寄存器的地址转换表开始地址的逻辑地址和地址转换表开始地址的条目,或 具有等于​​存储器请求逻辑地址的逻辑地址和组标识符的条目和控制寄存器的组标识符在地址转换缓冲器中,条目的实际地址被呈现为有效并用于存储器访问。
    • 10. 发明授权
    • I/O Execution method for a virtual machine system and system therefor
    • I / O虚拟机系统及其系统的执行方法
    • US4885681A
    • 1989-12-05
    • US691909
    • 1985-01-16
    • Hidenori UmenoTakashige KuboNobutaka HagiwaraHiroaki SatoHideo Sawamoto
    • Hidenori UmenoTakashige KuboNobutaka HagiwaraHiroaki SatoHideo Sawamoto
    • G06F9/455G06F9/46G06F12/08G06F12/10G06F13/10
    • G06F13/10G06F9/45558G06F2009/45579
    • In a virtual machine system (VMS) capable of concurrently running at least one operating system (OS) under one real computer system and a control program (VMCP) for controlling the VMS, the object is to reduce the overhead produced for simulating VM I/Os by direct I/O execution. A VM information area of a real sub-channel control block has a status field in which a flag indicating that the sub-channel is dedicated or not is contained. When the flag is "0", it means that the sub-channel is dedicated to the VM and the sub-channel scheduling by the VMCP is not necessary. As a real interruption priority order is dedicated to a VM, only I/O interruption requests of the VM are queued into the real interruption request queue of that dedicated priority order, and the mixing of VMs in that real interruption priority order is avoided. When an interruption control mask of an interruption priority order of the OS on the VM is "0" indicating that the interruption is not acceptable by the VM, the interruption control mask of the corresponding dedicated real interruption priority order is also "0" and the hardware interruption does not take place. Accordingly, the interruption is retained by the hardware and the I/O interruption retention for the VM by the VMCP is avoided.
    • 在能够在一个实际计算机系统下同时运行至少一个操作系统(OS)的虚拟机系统(VMS)和用于控制VMS的控制程序(VMCP)的情况下,目的是减少模拟VM I / Os通过直接I / O执行。 实际子信道控制块的VM信息区域具有包含表示子信道为专用的标志的状态字段。 当标志为“0”时,这意味着该子信道专用于该VM,并且该VMCP的子信道调度是不必要的。 由于真正的中断优先级顺序专用于VM,因此只有VM的I / O中断请求被排队到该专用优先级顺序的实际中断请求队列中,并且避免了该实际中断优先级顺序的VM的混合。 当VM上的OS的中断优先级顺序的中断控制掩码为“0”,表示VM不能接受中断时,相应的专用实际中断优先级顺序的中断控制掩码也为“0”,并且 硬件中断不会发生。 因此,中断由硬件保留,并且避免VMCP对VM的I / O中断保持。