Advanced Micro Devices Corporation

Harry J Wise

Alexander Fuad Ashkar

Rex Eldon McCrary

Michael Mantor

Manu Rastogi

Ruijin Wu

Anirudh Rajendra Acharya

Angel E Socarras

Randy Wayne Ramsey

Yi Luo

Rakan Z Khraisha

James Robert Klobcar

A technique for executing commands for an accelerated processing device is provided. The technique includes obtaining an iteration number and predication data from metadata for an iterative indirect command buffer; for each iteration indicated by the iteration number, performing commands of the iterative indirect command buffer as specified by the predication data; and ending processing of the iterative indirect command buffer in response to processing a number of iterations equal to the iteration number.

Iterative indirect command buffers

A system includes a processing unit such as a GPU that itself includes a command processor configured to receive instructions for execution from a software application. A processor pipeline coupled to the processing unit includes a set of parallel processing units for executing the instructions in sets. A set manager is coupled to one or more of the processor pipeline and the command processor. The set manager includes at least one table for storing a set start time, a set end time, and a set execution time. The set manager determines an execution time for one or more sets of instructions of a first window of sets of instructions submitted to the processor pipeline. Based on the execution time of the one or more sets of instructions, a set limit is determined and applied to one or more sets of instructions of a second window subsequent to the first window.

Marker-based processor instruction grouping

A method of packet attribute confirmation includes receiving, at a command processor of a parallel processor, a command packet including a received packet attribute, such as a packet size, of the command packet. The command processor compares the received packet attribute of the command packet relative to an expected packet attribute of the command packet. The command processor passes one or more commands to a prefetch parser such that a summed total size of the one or more commands is equal to the received packet size of the command packet. The command processor passes, based at least on determining a match between the received packet size and the expected packet size, the received command packet to the prefetch parser. Otherwise, the command processor passes, based at least on determining a mismatch between the received packet size and the expected packet size, one or more no-operation instructions to the prefetch parser.

Hardware security hardening for processor devices

A processing system includes a content addressable memory (CAM) in an input/output path to selectively modify register writes on a per-pipeline basis. The CAM compares an address of a register write to an address field of each entry of the CAM. If a match is found, the CAM modifies the register write data as defined by a function for the matching entry of the CAM. In some embodiments, each entry of the CAM includes a data mask defining subfields of the register write data, wherein each subfield includes subfield data including one or more bits.

Content addressable memory with sub-field minimum and maximum clamping

A method of context bouncing includes receiving, at a command processor of a graphics processing unit (GPU), a conditional execute packet providing a hash identifier corresponding to an encapsulated state. The encapsulated state includes one or more context state packets following the conditional execute packet. A command packet following the encapsulated state is executed based at least in part on determining whether the hash identifier of the encapsulated state matches one of a plurality of hash identifiers of active context states currently stored at the GPU.

Graphics context bouncing

A processing unit employs microcode wherein the jump table associated with the microcode is embedded in the microcode itself. When the microcode is compiled based on a set of programmer instructions, the compiler prepares the jump table for the microcode and stores the jump table in the same file or other storage unit as the microcode. When the processing unit is initialized to execute a program, such as an operating system, the processing unit retrieves the microcode corresponding to the program from memory, stores the microcode in a cache or other memory module for execution, and automatically loads the embedded jump table from the microcode to a specified set of jump table registers, thereby preparing the processing unit to process received packets.

Processor microcode with embedded jump table

Systems, apparatuses, and methods for suspending and restoring operations on a processor are disclosed. In one embodiment, a processor includes at least a control unit, multiple execution units, and multiple work creation units. In response to detecting a request to suspend a software application executing on the processor, the control unit sends requests to the plurality of work creation units to stop creating new work. The control unit waits until receiving acknowledgements from the work creation units prior to initiating a suspend operation. Once all work creation units have acknowledged that they have stopped creating new work, the control unit initiates the suspend operation. Also, when a restore operation is initiated, the control unit prevents any work creation units from launching new work-items until all previously in-flight work-items have been restored to the same work creation units and execution units to which they were previously allocated.

Suspend and restore processor operations

Systems, apparatuses, and methods for preloading caches using a direct memory access (DMA) engine with a fast discard mode are disclosed. In one embodiment, a processor includes one or more compute units, a DMA engine, and one or more caches. When a shader program is detected in a sequence of instructions, the DMA engine is programmed to utilize a fast discard mode to prefetch the shader program from memory. By prefetching the shader program from memory, the one or more caches are populated with address translations and the shader program. Then, the DMA engine discards the shader program rather than writing the shader program to another location. Accordingly, when the shader program is invoked on the compute unit(s), the shader program and its translations are already preloaded in the cache(s).

Preloading translation and data caches using on-chip DMA engine with fast data discard

Systems, apparatuses, and methods for implementing software control of state sets are disclosed. In one embodiment, a processor includes at least an execution unit and a plurality of state registers. The processor is configured to detect a command to allocate a first state set for storing a first state, wherein the command is generated by software, and wherein the first state specifies values for the plurality of state registers. The command is executed on the execution unit while the processor is in a second state, wherein the second state is different from the first state. The first state set of the processor is allocated with the first state responsive to executing the command on the execution unit. The processor is configured to allocate the first state set for the first state prior to the processor entering the first state.

Software control of state sets

An adaptive list stores previously received hardware state information that has been used to configure a graphics processing core. One or more filters are configured to filter packets from a packet stream directed to the graphics processing core. The packets are filtered based on a comparison of hardware state information included in the packet and hardware state information stored in the adaptive list. The adaptive list is modified in response to filtering the first packet. The filters can include a hardware filter and a software filter that selectively filters the packets based on whether the graphics processing core is limiting throughput. The adaptive list can be implemented as content-addressable memory (CAM), a cache, or a linked list.

Growing community of inventors

Chuluota, FL, United States of America

Harry J Wise