Please consider the following thread setup intended to free-up the UI while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with a
hyperthreading P4. It is floating point arithmatic intensive. When I run the
program the UI is unavailable until the final C result - which is double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop then
returns a string.
What's wrong? How fix?
--
mark b
11  1342 
Hello Mark ,,,
This aproach will only work on a MP system , you could possibly acomplish
what you want ( responsive gui ) by using threading and create the worker
threads as lower prio background threads
Ofcourse will this result in longer processing time ( takes longer before
you app is finished )
regards
Michel Posseth [MCP]
"mark" <ma**@discussio ns.microsoft.co m> wrote in message
news:BB******** *************** ***********@mic rosoft.com... Please consider the following thread setup intended to free-up the UI
while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with
a
hyperthreading P4. It is floating point arithmatic intensive. When I run
the
program the UI is unavailable until the final C result - which is
double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop
then
returns a string.
What's wrong? How fix?
--
mark b
The acronym MP is multiprocessor? If so, do you think dual core processors
can do it. I have considered the posibility that memory access is the problem
as my Matrix_multiply sub is multiplying arrays.
--
mark b
"m.posseth" wrote: Hello Mark ,,,
This aproach will only work on a MP system , you could possibly acomplish
what you want ( responsive gui ) by using threading and create the worker
threads as lower prio background threads
Ofcourse will this result in longer processing time ( takes longer before
you app is finished )
regards
Michel Posseth [MCP]
"mark" <ma**@discussio ns.microsoft.co m> wrote in message
news:BB******** *************** ***********@mic rosoft.com... Please consider the following thread setup intended to free-up the UI
while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with
a
hyperthreading P4. It is floating point arithmatic intensive. When I run
the
program the UI is unavailable until the final C result - which is
double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop
then
returns a string.
What's wrong? How fix?
--
mark b
The answer to both is yes ,
MP is multi processor system , and yes the multicore architecture that AMD
and Intel are now shipping ( where in my opinion the AMD implemetation is
far superior ) would perform as a true MP system and so solve this
bottleneck problem .
Although if it is the responsiveness you want then using the background
thread option might still be a good idea ( although the processing time
might take a lot longer )
regards
Michel Posseth [MCP]
"mark" <ma**@discussio ns.microsoft.co m> schreef in bericht
news:64******** *************** ***********@mic rosoft.com...
The acronym MP is multiprocessor? If so, do you think dual core processors
can do it. I have considered the posibility that memory access is the
problem
as my Matrix_multiply sub is multiplying arrays.
--
mark b
"m.posseth" wrote:
Hello Mark ,,,
This aproach will only work on a MP system , you could possibly
acomplish
what you want ( responsive gui ) by using threading and create the worker
threads as lower prio background threads
Ofcourse will this result in longer processing time ( takes longer before
you app is finished )
regards
Michel Posseth [MCP]
"mark" <ma**@discussio ns.microsoft.co m> wrote in message
news:BB******** *************** ***********@mic rosoft.com... > Please consider the following thread setup intended to free-up the UI
> while a
> huge process takes place:
>
> (declare delegates) (A B and C all global)
>
> Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
> System.EventArg s) Handles AB.Click
> Dim NoArg1 As New NoArgs(AddressO f AxB)
> NoArg1.BeginInv oke(Nothing, Nothing)
> End Sub
>
> Private Sub AxB()
> Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
> Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B,
> Nothing,
> Nothing)
> Do Until AsyncResult.IsC ompleted
> For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
> Loop
> C = mult.EndInvoke( AsyncResult)
> do other stuff with C
> End Sub
>
> Matrix_Multiply is the class solver and consumes 50% of CPU resources
> with
> a
> hyperthreading P4. It is floating point arithmatic intensive. When I
> run
> the
> program the UI is unavailable until the final C result - which is
> double(,) -
> is obtained. Button3.text initially shows activity but then stops. The
> threading logic works fine with a local function that simply runs a
> loop
> then
> returns a string.
>
> What's wrong? How fix?
> --
> mark b
Mark,
The first thing I noticed was that you're accessing a Control on a
thread other than the one it was created on. This will cause
unpredictable problems on the 1.1 framework and an exception on the 2.0
framework. You need to use Control.Invoke to marshal the execution of
a delegate onto the UI thread so that you can access controls and forms
safely within that delegate.
Another thing I noticed is that you're spinning in a loop waiting for
the Matrix_Multiply method to complete. That will certainly consume a
lot of CPU time and make the UI somewhat unresponsive.
However, it doesn't appear that the UI would be completely unresponsive
since the UI thread isn't blocked by any of the code you posted.
Brian
mark wrote: Please consider the following thread setup intended to free-up the UI while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with a
hyperthreading P4. It is floating point arithmatic intensive. When I run the
program the UI is unavailable until the final C result - which is double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop then
returns a string.
What's wrong? How fix?
--
mark b
Mark,
The keywords you have to look at for what you are doing are
Threading.threa d.sleep(millise conds) http://msdn2.microsoft.com/en-us/library/d00bd51t.aspx
Queue class. http://msdn2.microsoft.com/en-us/lib...ons.queue.aspx
And for version 2005
Backgroundworke r http://msdn2.microsoft.com/en-us/library/c8dcext2.aspx
It will probably make your application a lot easier.
I hope this helps,
Cor
"mark" <ma**@discussio ns.microsoft.co m> schreef in bericht
news:BB******** *************** ***********@mic rosoft.com... Please consider the following thread setup intended to free-up the UI
while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with
a
hyperthreading P4. It is floating point arithmatic intensive. When I run
the
program the UI is unavailable until the final C result - which is
double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop
then
returns a string.
What's wrong? How fix?
--
mark b
Brian
Re: accessing a Control on a thread other than the one it was created on
Do you mean the Button3 control?
--
mark b
"Brian Gideon" wrote: Mark,
The first thing I noticed was that you're accessing a Control on a
thread other than the one it was created on. This will cause
unpredictable problems on the 1.1 framework and an exception on the 2.0
framework. You need to use Control.Invoke to marshal the execution of
a delegate onto the UI thread so that you can access controls and forms
safely within that delegate.
Another thing I noticed is that you're spinning in a loop waiting for
the Matrix_Multiply method to complete. That will certainly consume a
lot of CPU time and make the UI somewhat unresponsive.
However, it doesn't appear that the UI would be completely unresponsive
since the UI thread isn't blocked by any of the code you posted.
Brian
mark wrote: Please consider the following thread setup intended to free-up the UI while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with a
hyperthreading P4. It is floating point arithmatic intensive. When I run the
program the UI is unavailable until the final C result - which is double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop then
returns a string.
What's wrong? How fix?
--
mark b
Cor,
Do I use the sleep function in the do loop to wait for
asyncresult.IsC ompleted?
What do I do with Queue?
--
mark b
"Cor Ligthert [MVP]" wrote: Mark,
The keywords you have to look at for what you are doing are
Threading.threa d.sleep(millise conds)
http://msdn2.microsoft.com/en-us/library/d00bd51t.aspx
Queue class.
http://msdn2.microsoft.com/en-us/lib...ons.queue.aspx
And for version 2005
Backgroundworke r
http://msdn2.microsoft.com/en-us/library/c8dcext2.aspx
It will probably make your application a lot easier.
I hope this helps,
Cor
"mark" <ma**@discussio ns.microsoft.co m> schreef in bericht
news:BB******** *************** ***********@mic rosoft.com... Please consider the following thread setup intended to free-up the UI
while a
huge process takes place:
(declare delegates) (A B and C all global)
Private Sub AB_Click(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles AB.Click
Dim NoArg1 As New NoArgs(AddressO f AxB)
NoArg1.BeginInv oke(Nothing, Nothing)
End Sub
Private Sub AxB()
Dim mult As New TwoArgs(Address Of solver.Matrix_M ultiply)
Dim AsyncResult As IAsyncResult = mult.BeginInvok e(A, B, Nothing,
Nothing)
Do Until AsyncResult.IsC ompleted
For i = 1 To 1000000 : Next : Button3.Text = Rnd().ToString
Loop
C = mult.EndInvoke( AsyncResult)
do other stuff with C
End Sub
Matrix_Multiply is the class solver and consumes 50% of CPU resources with
a
hyperthreading P4. It is floating point arithmatic intensive. When I run
the
program the UI is unavailable until the final C result - which is
double(,) -
is obtained. Button3.text initially shows activity but then stops. The
threading logic works fine with a local function that simply runs a loop
then
returns a string.
What's wrong? How fix?
--
mark b
mark wrote: Brian
Re: accessing a Control on a thread other than the one it was created on
Do you mean the Button3 control?
Yes.
mark wrote: Cor,
Do I use the sleep function in the do loop to wait for
asyncresult.IsC ompleted?
You can use the IAsyncResult.As yncWaitHandle.W aitOne method to block
the current thread until the asynchronous operation is complete. If
you want the current thread to be doing something then yes, you can use
the Thread.Sleep method to yield CPU time to other threads until
IAsyncResult.Is Completed returns true.
What do I do with Queue?
I'm not seeing how the Queue helps in your situation either. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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