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Low-level parallel thread execution virtual machine and instruction set architecture
Parallel Thread Execution (PTX or NVPTX) is a low-level parallel thread execution virtual machine and instruction set architecture used in Nvidia's Compute
Parallel_Thread_Execution
Component of a computer process
In computer science, a thread of execution is the smallest sequence of programmed instructions that can be managed independently by a Scheduler, which
Thread_(computing)
Software design pattern
In computer programming, a thread pool is a software design pattern for achieving concurrency of execution in a computer program. Often also called a
Thread_pool
Programming paradigm in which many processes are executed simultaneously
correct program execution, the above program can be rewritten to use locks: One thread will successfully lock variable V, while the other thread will be locked
Parallel_computing
Programming abstraction
A thread block is a programming abstraction that represents a group of threads that can be executed serially or in parallel. For better process and data
Thread block (CUDA programming)
Thread_block_(CUDA_programming)
each process. Parallel Thread Execution Process control block (PCB) Thread Environment Block (TEB) Thread-local storage (TLS) "Thread Control Block in
Thread_control_block
Parallel computing execution model
Single instruction, multiple threads (SIMT) is an execution model used in parallel computing where a single central "control unit" broadcasts an instruction
Single instruction, multiple threads
Single_instruction,_multiple_threads
Behavioral rules for all elements of a programming language
illustrates why multi-threaded programming is difficult. Modern parallel languages have much easier to use execution models. The thread model was one of the
Execution_model
Ability of a CPU to provide multiple threads of execution concurrently
(or a single core in a multi-core processor) to provide multiple threads of execution. The multithreading paradigm has become more popular as efforts to
Multithreading (computer architecture)
Multithreading_(computer_architecture)
parallel execution model. A concurrent programming language is defined as one which uses the concept of simultaneously executing processes or threads
List of concurrent and parallel programming languages
List_of_concurrent_and_parallel_programming_languages
.NET managed concurrency library
TPL for execution. The Task Parallel Library (TPL) is the task parallelism component of the Parallel Extensions to .NET. It exposes parallel constructs
Parallel_Extensions
CPU that implements instruction-level parallelism within a single processor
multiple execution units, whereas the latter (pipeline) executes multiple instructions in the same execution unit in parallel by dividing the execution unit
Superscalar_processor
Lightweight threading implemented in userspace
In computer programming, a green thread is a thread that is scheduled by a runtime library or virtual machine (VM) instead of natively by the underlying
Green_thread
Proprietary compiler by Nvidia
compiled with the rest of the application using another tool or Parallel Thread Execution (PTX) or object code directly. An executable with CUDA code requires:
Nvidia_CUDA_Compiler
Execution model which allows for parallel computing
In computing, POSIX Threads, commonly known as pthreads (after its header <pthread.h>), is an execution model that exists independently from a programming
Pthreads
Computer runtime parallelization technique
anticipated to be executed later in parallel with the normal execution on a separate independent thread. Such a speculative thread may need to make assumptions
Speculative_multithreading
Internal code for computer graphics
(GLSL) Tungsten Graphics Shader Infrastructure Compute kernel Parallel Thread Execution ARB assembly language "Khronos SPIR-V Registry - The Khronos Group
Standard Portable Intermediate Representation
Standard_Portable_Intermediate_Representation
Technology for the production of textiles
Nvidia Parallel Thread Execution ISA derives some terminology (specifically the term Warp to refer to a group of concurrent processing threads) from historical
Weaving
Compiler backend for multiple programming languages
x86-64, ARM, Qualcomm Hexagon, LoongArch, M68K, MIPS, NVIDIA Parallel Thread Execution (PTX, also named NVPTX in LLVM documentation), PowerPC, AMD TeraScale
LLVM
Proprietary simultaneous multithreading implementation by Intel
operating system to schedule two threads or processes simultaneously and appropriately. When execution resources in a hyper-threaded processor are not in use
Hyper-threading
Concept in multi-threaded computer programming
executed by a thread, executed by the same thread, or simultaneously executed by another thread and still correctly complete the original execution. This requires
Thread_safety
Open standard for parallelizing
omp_get_thread_num()). The thread ID is an integer, and the primary thread has an ID of 0. After the execution of the parallelized code, the threads join
OpenMP
Way of setting up and executing parallel computer programs
that its execution may run in parallel (in a separate thread) with the following part of the function, up to the join that causes all threads to synchronize
Fork–join_model
Compiler transformation of sequential programs for parallel execution
in parallel. The generated program may use multiple processor cores or hardware threads, vector instructions, or other forms of parallel execution. Automatic
Automatic_parallelization
Parallelization across multiple processors in parallel computing environments
this job as a data parallel job on 4 processors the time taken would reduce to (n/4)×Ta + merging overhead time units. Parallel execution results in a speedup
Data_parallelism
Extension of the C programming language
single thread of execution per processor. In order to express parallelism, UPC extends ISO C 99 with the following constructs: An explicitly parallel execution
Unified_Parallel_C
Executing several computations during overlapping time periods
system—whether a program, computer, or a network—where there is a separate execution point or "thread of control" for each process. A concurrent system is one where
Concurrent_computing
Mechanism that ensures threads are not executed in parallel
computer-language interpreters to synchronize the execution of threads so that only one native thread (per process) can execute basic operations (such
Global_interpreter_lock
Form of parallelization of computer code
different thread (or process) on the same or different data. The threads may execute the same or different code. In the general case, different execution threads
Task_parallelism
Computer synchronizing instruction
out-of-order execution. This reordering of memory operations (loads and stores) normally goes unnoticed within a single thread of execution, but can cause
Memory_barrier
Process for increasing the performance between two systems solving the same problem
a parallel architecture). Latency is often measured in seconds per unit of execution workload. Throughput is often measured in units of execution workload
Speedup
Parallel computing algorithm
dynamically multithreaded computation, one that can "spawn" new threads of execution, on a statically multithreaded computer, with a fixed number of processors
Work_stealing
Area of research
example, the C programming language has no behavior in its execution model for input/output or thread behavior. But such behavior can be invoked from C syntax
Programming_model
Parallel computing platform and programming model
Bibcode:2023ITPDS..34..246S. doi:10.1109/tpds.2022.3217824. S2CID 249431357. "Parallel Thread Execution ISA Version 7.7". Raihan, Md Aamir; Goli, Negar; Aamodt, Tor (2018)
CUDA
Performing the actions encoded in a computer program
In computing, execution is a process by which a computer program is read by a computer and the computer performs the actions encoded in the program. As
Execution_(computing)
Efficiency improving technique for superscalar CPUs
CPUs with hardware multithreading. SMT permits multiple independent threads of execution to better use the resources provided by modern processor architectures
Simultaneous_multithreading
Parallel computing platform: GPGPU libraries and application programming interface
Radeon Pro. Nvidia provides a C/C++-centered frontend and its Parallel Thread Execution (PTX) LLVM GPU backend as the Nvidia CUDA Compiler (NVCC). All
ROCm
Parallel computing paradigm
mutual exclusion is a parallel computing programming paradigm in which threads are divided into atomic chunks, and the atomic execution of the chunks automatically
Automatic_mutual_exclusion
Abstraction of parallel computer architecture
constituent processes are formulated. A task-parallel model focuses on processes, or threads of execution. These processes will often be behaviourally
Parallel_programming_model
Parallel version of breadth-first search algorithm
load-balanced. Moreover, exploring data-locality can also speed up parallel execution. Parallel BFS algorithms with shared memory can be divided into two types:
Parallel_breadth-first_search
Particular execution of a computer program
initiate, control and coordinate execution activity. Depending on the OS, a process may be made up of multiple threads of execution that execute instructions
Process_(computing)
Interaction of threads in Java software
describes how threads in the Java programming language interact through memory. Together with the description of single-threaded execution of code, the
Java_memory_model
Formula in computer architecture
file to a separate thread for processing. The part that scans the directory and creates the file list cannot be sped up on a parallel computer, but the
Amdahl's_law
Subfield of computer science
of multiple cooperating threads of execution. One of the primary goals of parallel analysis is to understand how a parallel algorithm's use of resources
Analysis of parallel algorithms
Analysis_of_parallel_algorithms
Data structure that can be used by multiple threads
data structure designed for access and modification by multiple computing threads (or processes or nodes) on a computer, for example concurrent queues, concurrent
Concurrent_data_structure
Intel processor microarchitecture
microarchitecture includes features such as Hyper-threading, Hyper Pipelined Technology, Rapid Execution Engine, Execution Trace Cache, and replay system which all
NetBurst
Topics referred to by the same term
Pneumothorax, a medical condition also sometimes called "collapsed lung" Parallel Thread Execution, an intermediary assembler language by NVIDIA ptx (Unix), a Unix
PTX
Unit of execution or work in software
unit of execution or a unit of work. The term is ambiguous; precise alternative terms include process, light-weight process, thread (for execution), step
Task_(computing)
Whenever new clients make requests, the forker thread will accept the client connection and fork a new thread for a dedicated communication channel between
KSMBD
Theoretical speedup formula in computer architecture
Gustafson–Barsis's law) gives the speedup in the execution time of a task that theoretically gains from parallel computing, using a hypothetical run of the
Gustafson's_law
elemental function in one or more threads of execution, hyperthreads, SIMD lanes or on multiple computers. Some parallel programming systems, such as OpenMP
Map_(parallel_pattern)
Computer system that provides behavior needed by running code
garbage collection, threads or other dynamic features built into the language. Every programming language specifies an execution model, and many implement
Runtime_system
Algorithm in a thread whose failure cannot cause another thread to fail
non-blocking if failure or suspension of any thread cannot cause failure or suspension of another thread; for some operations, these algorithms provide
Non-blocking_algorithm
Message-passing system for parallel computers
supercomputer. PARI/GP can be built to use MPI as its multi-thread engine, allowing to run parallel PARI and GP programs on MPI clusters unmodified. Actively
Message_Passing_Interface
Ability of computer instructions to be executed simultaneously with correct results
per step of this parallel execution. ILP must not be confused with concurrency. In ILP, there is a single specific thread of execution of a process. On
Instruction-level_parallelism
Collection of classes and functions used in the C++ programming language
contract violations) std::execution (contains the execution control library for asynchronous execution, including task<T>) std::execution::system_context_replaceability
C++_Standard_Library
Open standard for programming heterogenous computing systems, such as CPUs or GPUs
memory and execution model, and the programmer is not able to directly use hardware-specific technologies such as inline Parallel Thread Execution (PTX) for
OpenCL
Computer architecture to aid parallelism
exploiting ILP, where hardware dynamically discovers and schedules parallel execution at runtime. VLIW's primary motivation is achieving higher performance
Very_long_instruction_word
Computer programming technique
actions instigated by a program that take place concurrently with program execution, without the program hanging to wait for results. Asynchronous input/output
Asynchrony (computer programming)
Asynchrony_(computer_programming)
GPU microarchitecture by Nvidia
GigaThread global scheduler: distributes thread blocks to SM thread schedulers and manages the context switches between threads during execution (see
Fermi_(microarchitecture)
Performance-degrading usage pattern
globaldata[testLimit]; // sum of all threads execution times std::atomic_int64_t nsSum(0); for (int t = 0; t != nThreads; ++t) { threads.emplace_back([&](int i) {
False_sharing
Programming language
Computer Science: Theoretical work on scheduling multi-threaded applications. StarTech – a parallel chess program built to run on the Thinking Machines Corporation's
Cilk
is an execution model describing the ability of a parallel program to run sequentially. If a parallel program has a valid sequential execution it is said
Relaxed_sequential
Computer science constructs
Lisp Eager Future2 Lisp in parallel – A parallel programming library for Common Lisp Common Lisp PCall "Chapter 30. Thread 4.0.0". Retrieved 26 June 2013
Futures_and_promises
Computer programming paradigm
explored to enable large-scale computation, primarily by exploiting parallel execution. One major outcome of these efforts was single instruction, multiple
Stream_processing
requires sequential execution of three instructions. However, using two temporary registers, two processors executing in parallel can swap two variables
Swap_(computer_programming)
Serverless computing platform
multiple vCPUs, allowing for parallel execution. However, the clock speed per core remains unchanged, limiting individual thread performance. This configuration
AWS_Lambda
Central computer component that executes instructions
were designed to run multiple computation threads in parallel. This technology is known as multi-threading (MT). The approach is considered more cost-effective
Central_processing_unit
Protected section of code that cannot be executed by more than one process at a time
With this implementation, any execution thread entering any critical section in the system will prevent any other thread, including an interrupt, from
Critical_section
Microthreads are functions that may run in parallel to gain increased performance in microprocessors. They provide an execution model that uses a few additional
Microthread
C++ Standard Library header providing algorithm implementations
execution policy parallel_policy, which indicates that the execution of the algorithm may happen across multiple threads, however within each thread the
Algorithm_(C++)
as memory latency, and accordingly slow down overall execution by either reducing micro-threads or modifying scheduling policy. Ahmed, M.; R. Ammar; S
Micro-thread_(multi-core)
Synchronization mechanism for enforcing limits on access to a resource
that prevents state from being modified or accessed by multiple threads of execution at once. Locks enforce mutual exclusion concurrency control policies
Lock_(computer_science)
computation, where several threads signal the single waiting thread, which begins execution once the required number of thread signals exceed the threshold
Nuclear_computation
JavaScript runtime environment
A thread pool handles the execution of parallel tasks in Node.js. The main thread function call posts tasks to the shared task queue, which threads in
Node.js
Microprocessor with more than one processing unit
Hydra project introduced support for thread-level speculation (TLS), enabling more efficient parallel execution of programs. Several business motives
Multi-core_processor
System-design platform and development environment
parallel. Multi-processing and multi-threading hardware is exploited automatically by the built-in scheduler, which multiplexes multiple OS threads over
LabVIEW
computing applications run on massively parallel supercomputers consist of concurrent programs designed using multi-threaded, multi-process models. The applications
Testing high-performance computing applications
Testing_high-performance_computing_applications
Computing technique used to achieve parallelism
fork-and-join for parallel execution on general purpose multiprocessors. The (IBM) SPMD is the most common style of parallel programming and can be considered
Single_program,_multiple_data
Application programming interface from Microsoft
parallel processors on the GPU. This parallel execution model done by the compute pipeline is organized into a dispatch, thread groups, and threads.
DirectCompute
Concurrent execution of multiple processes
interrupted (cooperative multitasking). Multitasking does not require parallel execution of multiple tasks at exactly the same time; instead, it allows more
Computer_multitasking
Multi-core processor with a large number of cores
on high single-thread performance (e.g. devoting more silicon to out-of-order execution, deeper pipelines, more superscalar execution units, and larger
Manycore_processor
Inherent parallelism in expressed computation
constructs. A pure implicitly parallel language does not need special directives, operators or functions to enable parallel execution, in contrast to explicit
Implicit_parallelism
Thread synchronization mechanism
that is a type of spinlock that uses "tickets" to control which thread of execution is allowed to enter a critical section. The basic concept of a ticket
Ticket_lock
Data processing chain
computing processes (commands, program runs, tasks, threads, procedures, etc.), conceptually executed in parallel, with the output stream of one process being
Pipeline_(computing)
Software analysis tool
Advisor Threading "Suitability" feature helps to predict and compare the parallel SMP scalability and performance losses for different possible threading designs
Intel_Advisor
Component of computer engineering
central goal was to execute more instructions in parallel, thus increasing the effective execution speed of a program. These efforts introduced complicated
Microarchitecture
Asynchrony and awaiting feature in programming languages
using std::this_thread::sync_wait(), which blocks and returns optional<tuple<Ts...>>. A task is itself a sender (satisfies std::execution::sender), and
Async/await
Microprocessor microarchitecture
thereby reducing the overall execution time for a thread. Instead of waiting for a single instruction to complete all its execution stages, multiple instructions
Latency oriented processor architecture
Latency_oriented_processor_architecture
Specialized form of design pattern
(as in WHILE loop but in parallel) Deferred Choice - execute one of a number of alternative threads. The choice which thread is to be executed is not
Workflow_pattern
Tool to convert sequential code to parallel
automatic parallelization tool is a computer program aiding in automatic parallelization of existing sequential (single-threaded) code into parallel (multithreaded
Automatic parallelization tool
Automatic_parallelization_tool
Algorithm
algorithm for parallel systems that schedules related threads or processes to run simultaneously on different processors. Usually these will be threads all belonging
Gang_scheduling
Similar to C++ programming language
local processor or on a remote processor in a parallel computation. This message triggers the execution of code within the chare to handle the message
Charm++
transactional memory Alias analysis OpenMP Threading Building Blocks (TBB) Cilk/Cilk Plus Speculative execution Auto-parallelisation of Sieve C++ Programs[permanent
Sieve C++ Parallel Programming System
Sieve_C++_Parallel_Programming_System
Extraction of information from a running system to verify certain properties
monitor to passively observe the system execution, one can generate a smarter monitor that freezes the thread attempting to generate the second e.nextElement()
Runtime_verification
Type of consistency in programming which is based synchronization
previous execution from occurring after it. Lazy release consistency is a further optimization of release consistency. It assumes that the thread executing
Release_consistency
Set of computers configured in a distributed computing system
technical challenge, but parallel programming models can be used to effectuate a higher degree of parallelism via the simultaneous execution of separate portions
Computer_cluster
Software design pattern for parallel computing
a way to write concurrent, parallel and distributed computer programs by message passing. Compared to the use of threads and locks, this is a high level
Join-pattern
dependencies that occur across different threads in a parallel program. Dependencies between threads arise from two or more threads reading or writing a variable
Privatization (computer programming)
Privatization_(computer_programming)
Specialized computer hardware
and instruction level parallelism between different hardware threads. Hardware execution units do not in general rely on the von Neumann or modified Harvard
Hardware_acceleration
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PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
PARALLEL THREAD-EXECUTION
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