- Industry: Computer
- Number of terms: 4807
- Number of blossaries: 1
- Company Profile:
Sun Microsystems is a multinational vendor of computers, computer software and hardware, and information technology services.
A hardware feature where operations are reduced to multiple stages, each of which takes (typically) one cycle to complete. The pipeline is filled when new operations can be issued each cycle. If there are no dependencies among instructions in the pipe, new results can be delivered each cycle. Chaining implies pipelining of dependent instructions. If dependent instructions cannot be chained, when the hardware does not support chaining of those particular instructions, then the pipeline stalls.
Industry:Computer
In multithreading, a situation where two or more threads simultaneously access a shared resource. The results are indeterminate depending on the order in which the threads accessed the resource. This situation, called a data race, can produce different results when a program is run repeatedly with the same input. See also mutual exclusion, mutex lock, semaphore lock, single-lock strategy, spin lock.
Industry:Computer
A hardware feature of some pipeline architectures that allows the result of an operation to be used immediately as an operand for a second operation, simultaneously with the writing of the result to its destination register. The total cycle time of two chained operations is less than the sum of the stand-alone cycle times for the instructions. For example, the TI 8847 supports chaining of consecutive fadd, fsub, and fmul (of the same precision). Chained faddd/fmuld requires 12 cycles, while consecutive unchained faddd/fmuld requires 17 cycles.
Industry:Computer
In multitasking operating systems, such as the SunOStrademark operating system, processes run for a fixed time quantum. At the end of the time quantum, the CPU receives a signal from the timer, interrupts the currently running process, and prepares to run a new process. The CPU saves the registers for the old process, and then loads the registers for the new process. Switching from the old process state to the new is known as a context switch. Time spent switching contexts is system overhead; the time required depends on the number of registers, and on whether there are special instructions to save the registers associated with a process.
Industry:Computer
A grouping of audit events. Audit classes provide a way to select a group of events to audit. This term is used in XSCF firmware.
Industry:Computer
In multitasking operating systems, such as the SunOS operating system, processes run for a fixed time quantum. At the end of the time quantum, the CPU receives a signal from the timer, interrupts the currently running process, and prepares to run a new process. The CPU saves the registers for the old process, and then loads the registers for the new process. Switching from the old process state to the new is known as a context switch. Time spent switching contexts is system overhead; the time required depends on the number of registers, and on whether there are special instructions to save the registers associated with a process.
Industry:Computer
A general entity that contains XML and therefore is parsed when inserted into the XML document, as opposed to an unparsed entity.
Industry:Computer
In IEEE arithmetic, a number created from a value that otherwise overflows or underflows by adding a fixed offset to its exponent to position the wrapped value in the normal number range. Wrapped results are not currently produced on SPARC workstations.
Industry:Computer
A general entity that contains something other than XML. By its nature, an unparsed entity contains binary data.
Industry:Computer
In IEEE arithmetic, a nonzero floating point number with a biased exponent of zero. The subnormal numbers are those between zero and the smallest normal number.
Industry:Computer
