BenchmarkTaskflow

# Benchmark Taskflow

Compile and Run Benchmarks
BenchmarkTaskflow_1CompileAndRunBenchmarks
Configure Run Options
BenchmarkTaskflow_1ConfigureRunOptions
Specify the Run Model
BenchmarkTaskflow_1SpecifyTheRunModel
Specify the Number of Threads
BenchmarkTaskflow_1SpecifyTheNumberOfThreads
Specify the Number of Rounds
BenchmarkTaskflow_1SpecifyTheNumberOfRounds

# Compile and Run Benchmarks

To build the benchmark code, enable the CMake option `TF_BUILD_BENCHMARKS` to `ON` as follows:

    #under/taskflow/build
    ~$cmake../-DTF_BUILD_BENCHMARKS=ON
    ~$make

After you successfully build the benchmark code, you can find all benchmark instances in the `benchmarks/` folder. You can run the executable of each instance in the corresponding folder.

    ~$cdbenchmarks&ls
    bench_black_scholesbench_binary_treebench_graph_traversal...
    ~$./bench_graph_traversal
    |V|+|E|Runtime
    20.197
    8420.198
    32840.488
    72880.774
    ......
    ......
    61980275.135
    66477177.436
    71120083.957

You can display the help message by giving the option `help`.

    ~$./bench_graph_traversal--help
    GraphTraversal
    Usage:./bench_graph_traversal[OPTIONS]

    Options:
    -h,--helpPrintthishelpmessageandexit
    -t,--num_threadsUINTnumberofthreads(default=1)
    -r,--num_roundsUINTnumberofrounds(default=1)
    -m,--modelTEXTmodelnametbb|omp|tf(default=tf)

We currently implement the following instances that are commonly used by the parallel computing community to evaluate the system performance.

Instance | Description
bench_binary_tree | traverses a complete binary tree
bench_black_scholes | computes option pricing with Black-Shcoles Models
bench_graph_traversal | traverses a randomly generated direct acyclic graph
bench_linear_chain | traverses a linear chain of tasks
bench_mandelbrot | exploits imbalanced workloads in a Mandelbrot set
bench_matrix_multiplication | multiplies two 2D matrices
bench_mnist | trains a neural network-based image classifier on the MNIST dataset
bench_parallel_sort | sorts a range of items
bench_reduce_sum | sums a range of items using reduction
bench_wavefront | propagates computations in a 2D grid
bench_linear_pipeline | pipeline scheduling on a linear chain of pipes
bench_graph_pipeline | pipeline scheduling on a graph of pipes

# Configure Run Options

We implement consistent options for each benchmark instance. Common options are:

option | value | function
`-h` | none | display the help message
`-t` | integer | configure the number of threads to run
`-r` | integer | configure the number of rounds to run
`-m` | string | configure the baseline models to run, tbb, omp, or tf

You can configure the benchmarking environment by giving different options.

## Specify the Run Model

In addition to a Taskflow-based implementation for each benchmark instance, we have implemented two baseline models using the state-of-the-art parallel programming libraries, OpenMP and Intel TBB, to measure and evaluate the performance of Taskflow. You can select different implementations by passing the option `-m`.

    ~$./bench_graph_traversal-mtf#runtheTaskflowimplementation(default)
    ~$./bench_graph_traversal-mtbb#runtheTBBimplementation
    ~$./bench_graph_traversal-momp#runtheOpenMPimplementation

## Specify the Number of Threads

You can configure the number of threads to run a benchmark instance by passing the option `-t`. The default value is one.

    #runtheTaskflowimplementationusing4threads
    ~$./bench_graph_traversal-mtf-t4

Depending on your environment, you may need to use `taskset` to set the CPU affinity of the running process. This allows the OS scheduler to keep process on the same CPU(s) as long as practical for performance reason.

    #affinetheprocessto4CPUs,CPU0,CPU1,CPU2,andCPU3
    ~$taskset-c0-3bench_graph_traversal-t4

## Specify the Number of Rounds

Each benchmark instance evaluates the runtime of the implementation at different problem sizes. Each problem size corresponds to one iteration. You can configure the number of rounds per iteration to average the runtime.

    #measuretheruntimeinanaverageof10runs
    ~$./bench_graph_traversal-r10
    |V|+|E|Runtime
    20.109#theruntimevalue0.109isanaverageof10runs
    8420.298
    ......
    61980273.135
    66477174.436