公开(公告)号：US5655146A

公开(公告)日：1997-08-05

申请号：US680069

申请日：1996-07-12

申请人： Richard Irwin Baum ,  Glen Alan Brent ,  Hatem Mohamed Ghafir ,  Balakrishna Raghavendra Iyer ,  Inderpal Singh Narang ,  Gururaj Seshagiri Rao ,  Casper Anthony Scalzi ,  Satya Prakash Sharma ,  Bhaskar Sinha ,  Lee Hardy Wilson

发明人： Richard Irwin Baum ,  Glen Alan Brent ,  Hatem Mohamed Ghafir ,  Balakrishna Raghavendra Iyer ,  Inderpal Singh Narang ,  Gururaj Seshagiri Rao ,  Casper Anthony Scalzi ,  Satya Prakash Sharma ,  Bhaskar Sinha ,  Lee Hardy Wilson

IPC分类号： G06F12/10 ,  G06F9/30 ,  G06F9/38 ,  G06F9/46 ,  G06F9/50 ,  G06F15/16 ,  G06F15/177 ,  G06F13/12

CPC分类号： G06F9/5055 ,  G06F9/3877 ,  G06F9/3879 ,  G06F9/5044 ,  G06F9/547 ,  G06F2209/509

摘要： A coexecutor for executing functions offloaded from central processors (CPs) in a data processing system, as requested by one or more executing control programs, which include a host operating system (host OS), and subsystem programs and applications executing under the host OS. The offloaded functions are embodied in code modules. Code modules execute in the coexecutor in parallel with non-offloaded functions being executed by the CPs. Thus, the CPs do not need to execute functions which can be executed by the coexecutor. CP requests to the coexecutor specify the code modules which are accessed by the coexecutor from host shared storage under the same constraints and access limitations as the control programs. The coexecutor may emulate host dynamic address translation, and may use a provided host storage key in accessing host storage. The restricted access operating state for the coexecutor maintains data integrity. Coexecutors can be of the same architecture or of a totally different architecture from the CPs to provide an efficient processing environment for the offloaded functions. The coexecutor interfaces host software which provides the requests to the coexecutor. Offloaded modules, once accessed by the coexecutor, may be cached in coexecutor local storage for use by future requests to allow subsequent invocations to proceed without waiting to again load the same module.

摘要翻译： 用于执行由数据处理系统中的中央处理器（CP）卸载的执行器，如由一个或多个执行控制程序请求的，其包括主机操作系统（主机OS）以及在主机OS下执行的子系统程序和应用程序。 卸载的功能体现在代码模块中。 代码模块在执行程序中执行，与CP执行的非卸载函数并行执行。 因此，CP不需要执行可由coexecutor执行的功能。 向请求者执行的CP请求在与控制程序相同的约束和访问限制下指定由主机共享存储器由coexecutor访问的代码模块。 共同执行者可以模拟主机动态地址转换，并且可以使用提供的主机存储密钥来访问主机存储。 coexecutor的受限访问操作状态维护数据完整性。 共同执行者可以是与CP相同的架构或与CP完全不同的架构，为卸载的功能提供有效的处理环境。 接口主机将向主机提供请求的主机软件。 卸载的模块一旦被coexecutor访问，就可以被缓存在coexecutor本地存储器中，供将来的请求使用，以允许后续的调用继续进行，而不用等待再次加载相同的模块。

公开(公告)号：US5706489A

公开(公告)日：1998-01-06

申请号：US544496

申请日：1995-10-18

申请人： Chi-Hung Chi ,  Hatem Mohamed Ghafir ,  Balakrishna Raghavendra Iyer ,  Inderpal Singh Narang ,  Gururaj Seshagiri Rao ,  Bhaskar Sinha

发明人： Chi-Hung Chi ,  Hatem Mohamed Ghafir ,  Balakrishna Raghavendra Iyer ,  Inderpal Singh Narang ,  Gururaj Seshagiri Rao ,  Bhaskar Sinha

IPC分类号： G06F9/38

CPC分类号： G06F9/30076 ,  G06F9/3863 ,  G06F9/3877

摘要： A method for obtaining parallel instruction execution (PIE) for frequently used programming operations, such as database record compression or expansion, cryptographic encoding/decoding, page moving, etc., for which a hardware-assist may be provided. These functions can be performed in parallel with CPU processing by a PIE processing facility (PIE-PF). The method is hardware/microcode based and uses software control in supervisory mode. The preferred embodiment is controlled by privileged subsystem software under an operating system, and does not use I/O channel oriented off-load processing. When the CPU is interrupted during an incomplete parallel operation by the PIE-PF, it is checkpointed in main storage in a manner accessible to the subsystem. The subsystem (after completing a current CPU operation, such as a database record predicate evaluation, can check for the completion of the PIE-PF operation by examining an indicator in a control block in shared storage. Furthermore, if the parallel operation has not completed, the CPU can: a) continue the PIE-PF processing in parallel with other processing in the CPU, b) halt the parallel PIE-PF asynchronous operation and have the CPU do the rest of the operation synchronously, or c) resume the parallel operation in the processor or a hardware assist if an interruption caused the PIE-PF parallel operation to be checkpointed.

摘要翻译： 用于获得可以提供硬件辅助的频繁使用的编程操作（诸如数据库记录压缩或扩展，加密编码/解码，页面移动等）的并行指令执行（PIE）的方法。 这些功能可以与PIE处理设备（PIE-PF）的CPU处理并行执行。 该方法是基于硬件/微代码，并以监控模式使用软件控制。 优选实施例由操作系统下的特权子系统软件控制，并且不使用I / O通道定向的卸载处理。 当CPU在PIE-PF的不完全并行操作期间中断时，它将以子系统可访问的方式在主存储中进行检查。 子系统（完成目前的CPU操作，如数据库记录谓词评估）可以通过检查共享存储器中的控制块中的指示符来检查PIE-PF操作的完成情况，此外，如果并行操作未完成 CPU可以：a）与CPU中的其他处理并行执行PIE-PF处理，b）停止并行PIE-PF异步操作，并让CPU同步执行其余操作，或c）恢复并行 如果中断导致PIE-PF并行操作被检查点，则处理器中的操作或硬件辅助。