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31 Cards in this Set
- Front
- Back
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Utilization
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The non-idle percentage of a given resource.
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Hotspot
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A group of code that runs more than 8% of total runtime.
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Bottleneck
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A resource or stage in a pipeline that is the limiting factor in framerate.
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Balancing
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Moving processing from an over-utilized resource to a under-utilized resource.
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PC
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Contains a minimum of 2 cores when you consider the CPU and GPU.
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Front-End
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The stage of the cpu where branch prediction and instruction fetching occurs.
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Execution
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The stage where the instruction pool operates out of order instructions.
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Back-End
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The stage where exceptions are thrown and branch prediction miss notification occurs.
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Retirement
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Another name for the Back-End stage and runs in order. This is where the cpu throws exceptions.
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Equilibrium
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Occurs around 85% GPU Busy
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64
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The number of bytes of modern cache lines.
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Virtual Memory
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A layer of memory that manages paging to the hard drive.
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Benchmark
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The comparison test for determining optimization improvement.
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V-Tune
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An application used to determining CPU performance.
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Instrumented
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Required for accurate call graph results.
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Sampling
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A collection type that counts time or events as you application runs.
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Memoization
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Used to replace a runtime computation.
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Instruction Level Parellelism
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Overlapping the execution of instructions when they are independent of one another, so they can be evaluated in parallel.
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Branch Prediction
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The guess the cpu makes to allow it to multi-process micro operations.
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Cache
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Small fast expensive hardware.
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Micro-Ops
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Instructions that have been parsed and broken down into dependency free chunks so they can be executed out of order and in parallel of other instructions.
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Erroneous Data
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Data that is loaded into a cache due to spatial locality but never gets used.
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Spatial Locality
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The use of data elements within relatively close storage locations.
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Front Side Bus
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Connects the computer's processor to the system memory (RAM) and other components on the motherboard.
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Page Table
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A data structure used to store the mapping between virtual addresses and physical addresses
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Page Fault
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When a program accesses a page that is mapped in the virtual address space, but not loaded in physical memory.
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Thrashing
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Pages are swapped out and then accessed (loaded into physical memory) causing frequent faults.
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Inline
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A C++ keyword that causes the compiler to insert this block of code into your program.
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Loop Unrolling
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The act of expanding the code inside a loop.
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Computational Complexity
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The measure of how much processing is required for a given algorithm.
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Look-up Table
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An optimization technique that trades memory for speed.
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