Difference between revisions of "Glossary"
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<div style="font-size: 10pt; font-weight: bold;" id="a">a</div> | <div style="font-size: 10pt; font-weight: bold;" id="a">a</div> | ||
| − | [[ | + | [[genAsm_(code_representation)|Abstract Code]] - general data flow code for the Mill architecture, distribution format<br /> |
| − | [[ | + | [[genAsm_(language)|Abstract Assembly]] - general data flow code for the Mill architecture in human readable form, mainly used as compiler output<br /> |
<div style="font-size: 10pt; font-weight: bold;" id="b">b</div> | <div style="font-size: 10pt; font-weight: bold;" id="b">b</div> | ||
| + | [[Memory#Backless_Memory|Backless Memory]] - allocating memory happens in cache initially and often no DRAM and system bus needs to be involved at all<br /> | ||
[[Belt]] - provides the functionality of general purpose registers<br /> | [[Belt]] - provides the functionality of general purpose registers<br /> | ||
[[Belt#Belt_Position_Data_Format|Belt Position/Belt Location]] - the read only data source for machine operations<br /> | [[Belt#Belt_Position_Data_Format|Belt Position/Belt Location]] - the read only data source for machine operations<br /> | ||
| + | [[Block]] - a subsection of an instruction that contains a subset of the operations or data in a defined encoding format.<br /> | ||
[[Encoding#Instructions_and_Operations_and_Bundles|Bundle]] - a collection of instructions that get fetched from memory together<br /> | [[Encoding#Instructions_and_Operations_and_Bundles|Bundle]] - a collection of instructions that get fetched from memory together<br /> | ||
<div style="font-size: 10pt; font-weight: bold;" id="c">c</div> | <div style="font-size: 10pt; font-weight: bold;" id="c">c</div> | ||
| − | [[ | + | [[conAsm (code representation)|Concrete Code]] - specialized executable code for a specific Mill processor<br /> |
| − | [[ | + | [[conAsm|Concrete Assembly]] - specialized executable code for a specific Mill processor in human readable form, mainly used for testing and in the debugger<br /> |
[[Crossbar]] - the interconnecting framework that routes the data sources to the functional units<br /> | [[Crossbar]] - the interconnecting framework that routes the data sources to the functional units<br /> | ||
<div style="font-size: 10pt; font-weight: bold;" id="d">d</div> | <div style="font-size: 10pt; font-weight: bold;" id="d">d</div> | ||
| − | [[Decode]] - turning | + | [[Decode]] - turning instruction stream bit patters into requests to functional units<br /> |
[[Domains]] - operand value types, i.e. different interpretations of bit patterns by operations<br /> | [[Domains]] - operand value types, i.e. different interpretations of bit patterns by operations<br /> | ||
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[[Events#Faults|Fault]] - an interrupt normal program flow cannot recover from in a meaningful way<br /> | [[Events#Faults|Fault]] - an interrupt normal program flow cannot recover from in a meaningful way<br /> | ||
| + | [[Execution#fwr|First Winner Rule]] - only the first successful conditional branch operation in an instruction is taken<br /> | ||
[[FlowCore]] - the collection of functional units and facilities serving operations from the flow instruction stream<br /> | [[FlowCore]] - the collection of functional units and facilities serving operations from the flow instruction stream<br /> | ||
[[Functional Unit|FU, Functional Unit]] - the hardware module that provides the functionality to perform an operation<br /> | [[Functional Unit|FU, Functional Unit]] - the hardware module that provides the functionality to perform an operation<br /> | ||
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[[Phasing|Phase, Phasing]] - sequenced execution of different operations within one instruction<br /> | [[Phasing|Phase, Phasing]] - sequenced execution of different operations within one instruction<br /> | ||
[[Protection#Protection_Lookaside_Buffer|PLB]] - on chip cache for looking up protection regions for a virtual address<br /> | [[Protection#Protection_Lookaside_Buffer|PLB]] - on chip cache for looking up protection regions for a virtual address<br /> | ||
| − | [[Pipeline]] - a logical and physical grouping of functional units sharing infrastructure for sequential step by step | + | [[Pipeline]] - a logical and physical grouping of functional units sharing infrastructure for sequential step by step processing each cycle, emphasis on the physical aspect<br /> |
[[Pipelining]] - arrangeing operations in the instruction stream in such a way as to maximize functional unit utilization<br /> | [[Pipelining]] - arrangeing operations in the instruction stream in such a way as to maximize functional unit utilization<br /> | ||
[[Protection#Portals|Portal]] - a gateway between different protection domains or turfs a thread can pass through<br /> | [[Protection#Portals|Portal]] - a gateway between different protection domains or turfs a thread can pass through<br /> | ||
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<div style="font-size: 10pt; font-weight: bold;" id="r">r</div> | <div style="font-size: 10pt; font-weight: bold;" id="r">r</div> | ||
| − | [[ | + | [[Memory#Retire_Stations|Retire Station]] - the piece of hardware that implements loads from memory, and where those loaded values end up<br /> |
[[Protection#Region_Table|Region Table]] - the memory backing for the PLB<br /> | [[Protection#Region_Table|Region Table]] - the memory backing for the PLB<br /> | ||
| + | [[Pipeline#Result_Replay|Replay]] - the way the hardware restores machine state after being interrupted<br /> | ||
<div style="font-size: 10pt; font-weight: bold;" id="s">s</div> | <div style="font-size: 10pt; font-weight: bold;" id="s">s</div> | ||
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[[Virtual Address#Single_Address_Space|SAS]] - Single Address Space<br /> | [[Virtual Address#Single_Address_Space|SAS]] - Single Address Space<br /> | ||
[[Protection#Services|Service]] - a stateful call interface that can cross protection barriers<br /> | [[Protection#Services|Service]] - a stateful call interface that can cross protection barriers<br /> | ||
| − | [[Slot]] - a logical and physical grouping of functional units sharing infrastructure for sequential step by step | + | [[Slot]] - a logical and physical grouping of functional units sharing infrastructure for sequential step by step processing each cycle, emphasis on the logical aspect<br /> |
[[Specializer]] - turns general/abstract Mill code into concrete hardware specific machine instructions<br /> | [[Specializer]] - turns general/abstract Mill code into concrete hardware specific machine instructions<br /> | ||
[[Speculation]] - computing several paths in branches in parallel only to later throw away the unneeded results<br /> | [[Speculation]] - computing several paths in branches in parallel only to later throw away the unneeded results<br /> | ||
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<div style="font-size: 10pt; font-weight: bold;" id="t">t</div> | <div style="font-size: 10pt; font-weight: bold;" id="t">t</div> | ||
| − | [[Protection#Threads|Thread]] - a contained and | + | [[Protection#Threads|Thread]] - a contained and ID'd flow of execution<br /> |
[[Memory#Address_Translation|TLB]] - Translation Lookaside Buffer<br /> | [[Memory#Address_Translation|TLB]] - Translation Lookaside Buffer<br /> | ||
[[Events#Traps|Trap]] - an interrupt that afterwards is intended to resume normal program flow<br /> | [[Events#Traps|Trap]] - an interrupt that afterwards is intended to resume normal program flow<br /> | ||
Latest revision as of 21:25, 9 June 2015
0 a b c d e f g h i j k l m n o p q r s t u v w x y z
Abstract Code - general data flow code for the Mill architecture, distribution format
Abstract Assembly - general data flow code for the Mill architecture in human readable form, mainly used as compiler output
Backless Memory - allocating memory happens in cache initially and often no DRAM and system bus needs to be involved at all
Belt - provides the functionality of general purpose registers
Belt Position/Belt Location - the read only data source for machine operations
Block - a subsection of an instruction that contains a subset of the operations or data in a defined encoding format.
Bundle - a collection of instructions that get fetched from memory together
Concrete Code - specialized executable code for a specific Mill processor
Concrete Assembly - specialized executable code for a specific Mill processor in human readable form, mainly used for testing and in the debugger
Crossbar - the interconnecting framework that routes the data sources to the functional units
Decode - turning instruction stream bit patters into requests to functional units
Domains - operand value types, i.e. different interpretations of bit patterns by operations
EBB - extended basic block, a batch or sequence of instructions with one entry point and one or more exit points
Encoding – the semantic bit patterns representing operations
Event - an asynchronous diversion from normal program flow
Exit - a point where the instruction stream can leave the EBB
Exit Table - a hardware hash table containing exit point usage for EBBs, used to predict control flow
ExuCore - the collection of functional units and facilities serving operations from the exu instruction stream
Fault - an interrupt normal program flow cannot recover from in a meaningful way
First Winner Rule - only the first successful conditional branch operation in an instruction is taken
FlowCore - the collection of functional units and facilities serving operations from the flow instruction stream
FU, Functional Unit - the hardware module that provides the functionality to perform an operation
Ganging - combining more than two belt operands in more than one slot to perform a more complex operation
Implicit Zero - loads from new stack frames are implicitly zero
Interrupt - an event that has predefined but configurable handling code in the form of a function
Instruction - a collection of operations that get executed together
Instruction Stream - a sequence of instructions, the Mill has 2 working in parallel
Metadata - tags attached to belt slots that describe the data in it
Morsel - the amount of bits needed to address all belt locations on a core
None - undefined data in a slot that is silently ignored by operations
NaR - Not a Result, undefined data that traps when used in certain operations
Operation – the most basic semantically defined hardware unit of execution
Phase, Phasing - sequenced execution of different operations within one instruction
PLB - on chip cache for looking up protection regions for a virtual address
Pipeline - a logical and physical grouping of functional units sharing infrastructure for sequential step by step processing each cycle, emphasis on the physical aspect
Pipelining - arrangeing operations in the instruction stream in such a way as to maximize functional unit utilization
Portal - a gateway between different protection domains or turfs a thread can pass through
Prediction - deciding which branch to take in advance to prefetch the right code
PLB - Protection Lookaside Buffer
Portal - a cross turf call destination
Protection Region - specified continuous memory region with attached permissions
Retire Station - the piece of hardware that implements loads from memory, and where those loaded values end up
Region Table - the memory backing for the PLB
Replay - the way the hardware restores machine state after being interrupted
Scratchpad - Temporary buffer for operands from the belt
SAS - Single Address Space
Service - a stateful call interface that can cross protection barriers
Slot - a logical and physical grouping of functional units sharing infrastructure for sequential step by step processing each cycle, emphasis on the logical aspect
Specializer - turns general/abstract Mill code into concrete hardware specific machine instructions
Speculation - computing several paths in branches in parallel only to later throw away the unneeded results
Spiller - securely manages temporary memory used by certain operations in hardware
Stacklet - hardware managed memory line used in fragmented stacks
Stacklet Info Block - preserves stacklet state for a thread across portal calls
Thread - a contained and ID'd flow of execution
TLB - Translation Lookaside Buffer
Trap - an interrupt that afterwards is intended to resume normal program flow
Turf - memory protection domain on the Mill, a collection of regions
Virtual Zero - loads from all uninitialized memory yield zero
WKR, Well Known Region - protection regions not defined in the PLB but in registers, automatically managed by hardware
