[Bluez-devel] About the kernel 2.6.18

[Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

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All,

   My oepnsuse 10.1 with the default kernel 2.6.16.13-4.
   When 2.6.18-mh3 released, I rebuilt and updated the kernel to 2.6.18 and
then patched it.
   When Holtman released the patch for handling multiple l2cap connections,
I patched the new kernel .
   But at last, I found that the speed of  the OBEX pushing and other Rfcomm
socket communications is slower than the original kernel.
   Then I rebuilt the 2.6.18 without the 2.6.18-mh3 and the patch for
handling multiple l2cap connections, I found it is still slower.
   So I think the patch is not the reason.
   But what makes the bluetooth communication slower? The new kernel version
2.6.18?

   Waiting for your help;

-- 
With respects,
   Mingfan.Lu

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[Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 718 bytes --]

All,

   My oepnsuse 10.1 with the default kernel 2.6.16.13-4.
   When 2.6.18-mh3 released, I rebuilt and updated the kernel to 2.6.18 and
then patched it.
   When Holtman released the patch for handling multiple l2cap connections,
I patched the new kernel .
   But at last, I found that the speed of  the OBEX pushing and other Rfcomm
socket communications is slower than the original kernel.
   Then I rebuilt the 2.6.18 without the 2.6.18-mh3 and the patch for
handling multiple l2cap connections, I found it is still slower.
   So I think the patch is not the reason.
   But what makes the bluetooth communication slower? The new kernel version
2.6.18?

   Waiting for your help;

-- 
With respects,
   Mingfan.Lu

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Re: [Bluez-devel] About the kernel 2.6.18

[Marcel Holtmann]

Hi,

> 
>    My oepnsuse 10.1 with the default kernel 2.6.16.13-4.
>    When 2.6.18-mh3 released, I rebuilt and updated the kernel to
> 2.6.18 and then patched it.
>    When Holtman released the patch for handling multiple l2cap
> connections, I patched the new kernel .
>    But at last, I found that the speed of  the OBEX pushing and other
> Rfcomm socket communications is slower than the original kernel.
>    Then I rebuilt the 2.6.18 without the 2.6.18-mh3 and the patch for
> handling multiple l2cap connections, I found it is still slower.
>    So I think the patch is not the reason.
>    But what makes the bluetooth communication slower? The new kernel
> version 2.6.18?

if the 2.6.18 kernel is slower, then it must be something else. You
might wanna test with a 2.6.17 kernel.

Regards

Marcel



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Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 1692 bytes --]

Hi,
  I have rebuilt the 2.6.17, the speed is good. so, I don't know why
2.6.18makes the RFCOMM socket communication slower.
Who can have a try to compare the speed using different kernel ?
Need your nice help. :)


2006/10/4, Marcel Holtmann <marcel@holtmann.org>:
>
> Hi,
>
> >
> >    My oepnsuse 10.1 with the default kernel 2.6.16.13-4.
> >    When 2.6.18-mh3 released, I rebuilt and updated the kernel to
> > 2.6.18 and then patched it.
> >    When Holtman released the patch for handling multiple l2cap
> > connections, I patched the new kernel .
> >    But at last, I found that the speed of  the OBEX pushing and other
> > Rfcomm socket communications is slower than the original kernel.
> >    Then I rebuilt the 2.6.18 without the 2.6.18-mh3 and the patch for
> > handling multiple l2cap connections, I found it is still slower.
> >    So I think the patch is not the reason.
> >    But what makes the bluetooth communication slower? The new kernel
> > version 2.6.18?
>
> if the 2.6.18 kernel is slower, then it must be something else. You
> might wanna test with a 2.6.17 kernel.
>
> Regards
>
> Marcel
>
>
>
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-- 
With respects,
   Mingfan.Lu

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Re: [Bluez-devel] About the kernel 2.6.18

[Marcel Holtmann]

Hi,

>   I have rebuilt the 2.6.17, the speed is good. so, I don't know why
> 2.6.18 makes the RFCOMM socket communication slower.
> Who can have a try to compare the speed using different kernel ?
> Need your nice help. :)

do you have a nice and simple test program and some results of your
testing. I like to run it by myself.

Regards

Marcel



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Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 1650 bytes --]

Hi,
I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
====================================
Host:
 Vmware 5.5
 OS: Suse 10.1
 bluetooth dongle: 1.2
 File pushed: testpkg whose size is 137956B

Target:
  Nokia E61

  kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s   kernel
version: 2.6.16.13-4 (rebuilt from above) about 11-12s
  kernel version: 2.6.17 (built from kernel.org)  about 11-12s
  kernel version: 2.6.18: about  145s
  kernel version: 2.6.18 with mh4 (built with the patch from bluez):   143s
146s

Too terrible!!!
====================================

using other RFCOMM applications, 2.6.18 is slower too.

2006/10/8, Marcel Holtmann <marcel@holtmann.org>:
>
> Hi,
>
> >   I have rebuilt the 2.6.17, the speed is good. so, I don't know why
> > 2.6.18 makes the RFCOMM socket communication slower.
> > Who can have a try to compare the speed using different kernel ?
> > Need your nice help. :)
>
> do you have a nice and simple test program and some results of your
> testing. I like to run it by myself.
>
> Regards
>
> Marcel
>
>
>
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-- 
With respects,
   Mingfan.Lu

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Re: [Bluez-devel] About the kernel 2.6.18

[Stefan Seyfried]

On Mon, Oct 09, 2006 at 10:57:53AM +0800, Mingfan.Lu wrote:
> Hi,
> I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> Host:
> Vmware 5.5
> OS: Suse 10.1
> bluetooth dongle: 1.2
> File pushed: testpkg whose size is 137956B
> =

> Target:
>  Nokia E61
> =

>  kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s   kernel
> version: 2.6.16.13-4 (rebuilt from above) about 11-12s
>  kernel version: 2.6.17 (built from kernel.org)  about 11-12s
>  kernel version: 2.6.18: about  145s
>  kernel version: 2.6.18 with mh4 (built with the patch from bluez):   143s
> 146s

This means that ~1000bytes/second are transferred. I am using 2.6.18 with =

ppp-via-rfcomm and it does get me at least 45kB/second (3G/UMTS speed), with
a sony-ericsson k600i as target, so there are configurations where it still
works fine.

> Too terrible!!!
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> =

> using other RFCOMM applications, 2.6.18 is slower too.

Well, apparentely not everywhere and not for everybody.
-- =

Stefan Seyfried                     | "Please, just tell people
QA / R&D Team Mobile Devices        |               to use KDE."
SUSE LINUX Products GmbH, N=FCrnberg  |          -- Linus Torvalds

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Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 2064 bytes --]

Because Vmware I used, so I don't think it will make effect to the result.

2006/10/9, Stefan Seyfried <seife@suse.de>:
>
> On Mon, Oct 09, 2006 at 10:57:53AM +0800, Mingfan.Lu wrote:
> > Hi,
> > I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> > ====================================
> > Host:
> > Vmware 5.5
> > OS: Suse 10.1
> > bluetooth dongle: 1.2
> > File pushed: testpkg whose size is 137956B
> >
> > Target:
> >  Nokia E61
> >
> >  kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s
> kernel
> > version: 2.6.16.13-4 (rebuilt from above) about 11-12s
> >  kernel version: 2.6.17 (built from kernel.org)  about 11-12s
> >  kernel version: 2.6.18: about  145s
> >  kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> 143s
> > 146s
>
> This means that ~1000bytes/second are transferred. I am using 2.6.18 with
> ppp-via-rfcomm and it does get me at least 45kB/second (3G/UMTS speed),
> with
> a sony-ericsson k600i as target, so there are configurations where it
> still
> works fine.
>
> > Too terrible!!!
> > ====================================
> >
> > using other RFCOMM applications, 2.6.18 is slower too.
>
> Well, apparentely not everywhere and not for everybody.
> --
> Stefan Seyfried                     | "Please, just tell people
> QA / R&D Team Mobile Devices        |               to use KDE."
> SUSE LINUX Products GmbH, Nürnberg  |          -- Linus Torvalds
>
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-- 
With respects,
   Mingfan.Lu

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Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 2042 bytes --]

I used Vmware, I don't know it will make any effect.

2006/10/9, Stefan Seyfried <seife@suse.de>:
>
> On Mon, Oct 09, 2006 at 10:57:53AM +0800, Mingfan.Lu wrote:
> > Hi,
> > I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> > ====================================
> > Host:
> > Vmware 5.5
> > OS: Suse 10.1
> > bluetooth dongle: 1.2
> > File pushed: testpkg whose size is 137956B
> >
> > Target:
> >  Nokia E61
> >
> >  kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s
> kernel
> > version: 2.6.16.13-4 (rebuilt from above) about 11-12s
> >  kernel version: 2.6.17 (built from kernel.org)  about 11-12s
> >  kernel version: 2.6.18: about  145s
> >  kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> 143s
> > 146s
>
> This means that ~1000bytes/second are transferred. I am using 2.6.18 with
> ppp-via-rfcomm and it does get me at least 45kB/second (3G/UMTS speed),
> with
> a sony-ericsson k600i as target, so there are configurations where it
> still
> works fine.
>
> > Too terrible!!!
> > ====================================
> >
> > using other RFCOMM applications, 2.6.18 is slower too.
>
> Well, apparentely not everywhere and not for everybody.
> --
> Stefan Seyfried                     | "Please, just tell people
> QA / R&D Team Mobile Devices        |               to use KDE."
> SUSE LINUX Products GmbH, Nürnberg  |          -- Linus Torvalds
>
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-- 
With respects,
   Mingfan.Lu

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Re: [Bluez-devel] About the kernel 2.6.18

[Marcel Holtmann]

Hi,

> I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> ====================================
> Host:
>  Vmware 5.5 
>  OS: Suse 10.1 
>  bluetooth dongle: 1.2 
>  File pushed: testpkg whose size is 137956B
>  
> Target: 
>   Nokia E61 
>  
>   kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s 
>   kernel version: 2.6.16.13-4 (rebuilt from above) about 11-12s 
>   kernel version: 2.6.17 (built from kernel.org)  about 11-12s
>   kernel version: 2.6.18: about  145s
>   kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> 143s  146s

since you are using VMware. Which is running the 2.6.18 kernel. The host
or the guest operating system. This could be bottleneck in the USB part
and not Bluetooth.

Regards

Marcel



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Re: [Bluez-devel] About the kernel 2.6.18

[Peter Wippich]

Hi, 

On Mon, 9 Oct 2006, Mingfan.Lu wrote:

> I used Vmware, I don't know it will make any effect.
Never done any tests in that direction but if you use a linux running in a 
virtual machine you can expect large differences in all HW / I/O related 
benchmarks. To get any useful results you have to use a native 
installation. Tests run in a virtual environment are absolutly 
meaningless. 

Ciao, 

Peter 



|       Peter Wippich                   Voice: +49 30 46776411          |
|       G&W Instruments GmbH            fax:   +49 30 46776419          |
|       Gustav-Meyer-Allee 25, Geb. 12  Email: pewi@gw-instruments.de   |
|       D-13355 Berlin  / Germany                                       |


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Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 1488 bytes --]

Thanks, I will try to use a real machine to test it.

2006/10/9, Marcel Holtmann <marcel@holtmann.org>:
>
> Hi,
>
> > I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> > ====================================
> > Host:
> >  Vmware 5.5
> >  OS: Suse 10.1
> >  bluetooth dongle: 1.2
> >  File pushed: testpkg whose size is 137956B
> >
> > Target:
> >   Nokia E61
> >
> >   kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s
> >   kernel version: 2.6.16.13-4 (rebuilt from above) about 11-12s
> >   kernel version: 2.6.17 (built from kernel.org)  about 11-12s
> >   kernel version: 2.6.18: about  145s
> >   kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> > 143s  146s
>
> since you are using VMware. Which is running the 2.6.18 kernel. The host
> or the guest operating system. This could be bottleneck in the USB part
> and not Bluetooth.
>
> Regards
>
> Marcel
>
>
>
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-- 
With respects,
   Mingfan.Lu

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Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 2146 bytes --]

Hi,all,
the following is my test result in a real machine:

Memory:    1G DDR 533

Hard Disk: 5400转 8M cache

CPU:           PM 1.86G 2M cache
==OS: suse 10.1
==kernel 2.6.16.13-4 and 2.6.18
==Files: 2 file,one is 1M, the other is  77k
==Bluetooth OBEX Object Push client (0.99 beta1) to push file
==result:

Ave. time

 Kernel  2.6.16

 Kernel  2.6.18

First File (1M)

68 s

115 s

Second File (77k)

5 s

9 s

 ~15Kps  in 2.6.16
  ~8.5Kps  in 2.6.18
still slower.

2006/10/9, Mingfan. Lu <lucharse@gmail.com>:
>
> Thanks, I will try to use a real machine to test it.
>
> 2006/10/9, Marcel Holtmann <marcel@holtmann.org>:
> >
> > Hi,
> >
> > > I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> > > ====================================
> > > Host:
> > >  Vmware 5.5
> > >  OS: Suse 10.1
> > >  bluetooth dongle: 1.2
> > >  File pushed: testpkg whose size is 137956B
> > >
> > > Target:
> > >   Nokia E61
> > >
> > >   kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s
> > >   kernel version: 2.6.16.13-4 (rebuilt from above) about 11-12s
> > >   kernel version: 2.6.17 (built from kernel.org)  about 11-12s
> > >   kernel version: 2.6.18: about  145s
> > >   kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> > > 143s  146s
> >
> > since you are using VMware. Which is running the 2.6.18 kernel. The host
> > or the guest operating system. This could be bottleneck in the USB part
> > and not Bluetooth.
> >
> > Regards
> >
> > Marcel
> >
> >
> >
> >
> > -------------------------------------------------------------------------
> > Take Surveys. Earn Cash. Influence the Future of IT
> > Join SourceForge.net's Techsay panel and you'll get the chance to share
> > your
> > opinions on IT & business topics through brief surveys -- and earn cash
> > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> >
> > _______________________________________________
> > Bluez-devel mailing list
> > Bluez-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/bluez-devel
> >
>
>
>
> --
> With respects,
>    Mingfan.Lu




-- 
With respects,
   Mingfan.Lu

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-------------------------------------------------------------------------
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Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1.1: Type: text/plain, Size: 2529 bytes --]

Is there any people have done such a comparison?
I am confused the result.
Need your nice help:)
在06-10-11，Mingfan. Lu <lucharse@gmail.com> 写道：
>
> Hi,all,
> the following is my test result in a real machine:
>
> Memory:    1G DDR 533
>
> Hard Disk: 5400转 8M cache
>
> CPU:           PM 1.86G 2M cache
> ==OS: suse 10.1
> ==kernel 2.6.16.13-4 and 2.6.18
> ==Files: 2 file,one is 1M, the other is  77k
> ==Bluetooth OBEX Object Push client (0.99 beta1) to push file
> ==result:
>
> Ave. time
>
>  Kernel  2.6.16
>
>  Kernel  2.6.18
>
> First File (1M)
>
> 68 s
>
> 115 s
>
> Second File (77k)
>
> 5 s
>
> 9 s
>
>  ~15Kps  in 2.6.16
>   ~8.5Kps  in 2.6.18
> still slower.
>
> 2006/10/9, Mingfan. Lu <lucharse@gmail.com>:
> >
> > Thanks, I will try to use a real machine to test it.
> >
> > 2006/10/9, Marcel Holtmann <marcel@holtmann.org>:
> > >
> > > Hi,
> > >
> > > > I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> > > > ====================================
> > > > Host:
> > > >  Vmware 5.5
> > > >  OS: Suse 10.1
> > > >  bluetooth dongle: 1.2
> > > >  File pushed: testpkg whose size is 137956B
> > > >
> > > > Target:
> > > >   Nokia E61
> > > >
> > > >   kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s
> > > >   kernel version: 2.6.16.13-4 (rebuilt from above) about 11-12s
> > > >   kernel version: 2.6.17 (built from kernel.org)  about 11-12s
> > > >   kernel version: 2.6.18: about  145s
> > > >   kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> > > > 143s  146s
> > >
> > > since you are using VMware. Which is running the 2.6.18 kernel. The
> > > host
> > > or the guest operating system. This could be bottleneck in the USB
> > > part
> > > and not Bluetooth.
> > >
> > > Regards
> > >
> > > Marcel
> > >
> > >
> > >
> > > -------------------------------------------------------------------------
> > >
> > > Take Surveys. Earn Cash. Influence the Future of IT
> > > Join SourceForge.net's Techsay panel and you'll get the chance to
> > > share your
> > > opinions on IT & business topics through brief surveys -- and earn
> > > cash
> > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> > >
> > > _______________________________________________
> > > Bluez-devel mailing list
> > > Bluez-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/bluez-devel
> > >
> >
> >
> >
> > --
> > With respects,
> >    Mingfan.Lu
>
>
>
>
> --
> With respects,
>    Mingfan.Lu




-- 
With respects,
   Mingfan.Lu

[-- Attachment #1.2: Type: text/html, Size: 7912 bytes --]

[-- Attachment #2: Type: text/plain, Size: 373 bytes --]

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642

[-- Attachment #3: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Fwd: [Bluez-devel] About the kernel 2.6.18

[Mingfan.Lu]

[-- Attachment #1: Type: text/plain, Size: 2870 bytes --]

Marcel,

  How do you think about the test result?
  I need your nice help, thank you ;)

---------- Forwarded message ----------
From: Mingfan. Lu <lucharse@gmail.com>
Date: 2006-10-12 上午10:23
Subject: Re: [Bluez-devel] About the kernel 2.6.18
To: BlueZ development <bluez-devel@lists.sourceforge.net>


Is there any people have done such a comparison?
I am confused the result.
Need your nice help:)
在06-10-11，Mingfan. Lu <lucharse@gmail.com> 写道：
>
> Hi,all,
> the following is my test result in a real machine:
>
> Memory:    1G DDR 533
>
> Hard Disk: 5400转 8M cache
>
> CPU:           PM 1.86G 2M cache
> ==OS: suse 10.1
> ==kernel 2.6.16.13-4 and 2.6.18
> ==Files: 2 file,one is 1M, the other is  77k
> ==Bluetooth OBEX Object Push client (0.99 beta1) to push file
> ==result:
>
> Ave. time
>
>  Kernel  2.6.16
>
>  Kernel  2.6.18
>
> First File (1M)
>
> 68 s
>
> 115 s
>
> Second File (77k)
>
> 5 s
>
> 9 s
>
>  ~15Kps  in 2.6.16
>   ~8.5Kps  in 2.6.18
> still slower.
>
> 2006/10/9, Mingfan. Lu <lucharse@gmail.com>:
> >
> > Thanks, I will try to use a real machine to test it.
> >
> > 2006/10/9, Marcel Holtmann <marcel@holtmann.org>:
> > >
> > > Hi,
> > >
> > > > I am just use the Bluetooth OBEX Object Push client (0.99 beta1).
> > > > ====================================
> > > > Host:
> > > >  Vmware 5.5
> > > >  OS: Suse 10.1
> > > >  bluetooth dongle: 1.2
> > > >  File pushed: testpkg whose size is 137956B
> > > >
> > > > Target:
> > > >   Nokia E61
> > > >
> > > >   kernel version: 2.6.16.13-4 (built from Suse 10.1) about 11-12s
> > > >   kernel version: 2.6.16.13-4 (rebuilt from above) about 11-12s
> > > >   kernel version: 2.6.17 (built from kernel.org)  about 11-12s
> > > >   kernel version: 2.6.18: about  145s
> > > >   kernel version: 2.6.18 with mh4 (built with the patch from bluez):
> > > > 143s  146s
> > >
> > > since you are using VMware. Which is running the 2.6.18 kernel. The
> > > host
> > > or the guest operating system. This could be bottleneck in the USB
> > > part
> > > and not Bluetooth.
> > >
> > > Regards
> > >
> > > Marcel
> > >
> > >
> > >
> > > -------------------------------------------------------------------------
> > >
> > > Take Surveys. Earn Cash. Influence the Future of IT
> > > Join SourceForge.net's Techsay panel and you'll get the chance to
> > > share your
> > > opinions on IT & business topics through brief surveys -- and earn
> > > cash
> > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> > >
> > > _______________________________________________
> > > Bluez-devel mailing list
> > > Bluez-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/bluez-devel
> > >
> >
> >
> >
> > --
> > With respects,
> >    Mingfan.Lu
>
>
>
>
> --
> With respects,
>    Mingfan.Lu




-- 
With respects,
   Mingfan.Lu

-- 
With respects,
   Mingfan.Lu

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