nuget
the parallel task helper
VectorTask
01 Syntax
Microsoft.VisualBasic.Parallel.VectorTask
02 Methods
| Name | Overloads | Summary |
|---|---|---|
| .ctor | 1 | construct a new parallel task executator |
| Solve | 2 | Run in sequence |
| Run | 1 | Run in parallel |
| Allocate | 1 | allocate a block of result output memory data for one thread task |
| ParallelFor | 1 | implements the parallel for use the thread pool |
| CopyMemory | 1 | copy all data of span to the target region inside v |
| CopyMemory | 1 |
03 Properties
| Name | Overloads | Summary |
|---|---|---|
| num_threads | 1 | |
| span_size | 1 |
04 Fields
| Name | Overloads | Summary |
|---|---|---|
| workLen | 1 | the input pending task sequence size |
| sequenceMode | 1 | set this flag value to value TRUE for run algorithm debug |
| cpu_count | 1 | VectorTask.n_threads |
| n_threads | 2 | set number of cpu threads for run current VectorTask parallel. |
05 Members
#ctor(
Int32, Boolean, Nullable(Of Int32))construct a new parallel task executator
Remarks
the thread count for run the parallel task is configed via the VectorTask.n_threads by default.
Parameters
| Name | Type | Description |
|---|---|---|
nsize | Int32 | - |
Solve(
Int32, Int32, Int32)solve a sub task
Parameters
| Name | Type | Description |
|---|---|---|
start | Int32 | index offset start from zero |
ends | Int32 | - |
Solve
Run in sequence
Run
Run in parallel
Allocate``1(
Boolean)allocate a block of result output memory data for one thread task
Remarks
element count problem see the dev comments about the parameter thread_id from function VectorTask.ParallelFor()
Type Parameters
| Name | Description |
|---|---|
TOut |
Parameters
| Name | Type | Description |
|---|---|---|
all | Boolean | allocate all result(len=VectorTask.workLen) when set this parameter value TRUE or just for cpu worker thread(len=VectorTask.cpu_count) if set this parameter value FALSE? |
ParallelFor(
Int32, Int32)implements the parallel for use the thread pool
Parameters
| Name | Type | Description |
|---|---|---|
span_size | Int32 | - |
thread_id | Int32 | the thread id is start from based ZERO, but the upper index of the thread id is equals to the VectorTask.cpu_count, so group result vector should has value with |
CopyMemory``1(
``0(), ``0(), Int32)copy all data of span to the target region inside v
Type Parameters
| Name | Description |
|---|---|
T |
Parameters
| Name | Type | Description |
|---|---|---|
v | ``0() | - |
span | ``0() | may be a part of region inside v |
start | Int32 | - |
workLen
the input pending task sequence size
sequenceMode
set this flag value to value TRUE for run algorithm debug
cpu_count
n_threads
set number of cpu threads for run current VectorTask parallel. this thread value MUST BE configured before construct of the task object.
n_threads
num_threads
span_size
CopyMemory(
T(), Int32, Int32)