wait state


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wait state

[′wāt ‚stāt]
(computer science)
The state of a computer program in which it cannot use the central processing unit normally because the unit is waiting to complete an input/output operation.

wait state

(architecture)
A delay of one or more clock cycles added to a processor's instruction execution time to allow it to communicate with slow external devices. The number and duration of wait states may be pre-configured or they may be controlled dynamically via certain control lines.

wait state

The time spent waiting for an operation to take place. Wait states are often idle computer cycles, because a computer's CPU is much faster than main memory. Wait states are introduced between the time the CPU requests data from the RAM (an address is placed on the address bus) until the content has been delivered to the CPU. See address bus.
References in periodicals archive ?
The cache is a very fast local memory which stores frequently- used instructions and data, greatly reducing the processor wait states associated with access to the main memory.
In addition, nvSRAM devices emulate and replace fast SRAM in high-speed processor systems to reduce wait states and optimize performance, while also delivering the added benefit of backup protection for critical state information.
GSI Technology (Nasdaq:GSIT) today announced the availability of its 144Mb NBT[TM] (No Bus Turnaround) SRAM that supports back-to-back Read/Write operation with no wait states.
And its high speed allows the system processor to run with zero wait states in many applications," Bryant added.
In addition, Liberating Tech takes advantage of the 25 nanosecond performance of the nvSRAM to eliminate wait states for the processor, making it highly efficient.
With the AT27C2048 speed, systems can run with zero wait states.
System parallelism is accomplished via the 6x5 Smart Speed crossbar switch that nearly eliminates wait states and enables the processor to drive equivalent performance to processors with clock speeds up to 3 GHz, but without the power consumption penalty that goes with higher operating frequencies.
To diagnose user related problems, administrators need a clear understanding of the SQL workload, its associated wait states and key performance metrics.