Bug 1623

Bug 1623

[Chris Hallinan]

http://bughost.org/bugzilla/show_bug.cgi?id=1623

Anything else I can do to help move this along?  I'd love to dive into
the code, I just need a little guidance!  I've written and debugged a
few Linux drivers in my day...

Any other testing you need, I'd be happy to assist.

Thanks,

Chris

-- 
Life is like Linux - it never stands still.

Re: Bug 1623

[Tomas Winkler]

On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmail.com> wrote:
> http://bughost.org/bugzilla/show_bug.cgi?id=1623
>
>  Anything else I can do to help move this along?  I'd love to dive into
>  the code, I just need a little guidance!  I've written and debugged a
>  few Linux drivers in my day...
>
>  Any other testing you need, I'd be happy to assist.
>
>  Thanks,
>
>  Chris

We've recently committed fixes to 4965 rate scaling can you try the
latest version of wireless-testing kernel?


Thanks
Tomas
>  --
>  Life is like Linux - it never stands still.
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Re: Bug 1623

[Chris Hallinan]

On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.com> wrote:
> On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmail.com> wrote:
>  > http://bughost.org/bugzilla/show_bug.cgi?id=1623
>  >
>  >  Anything else I can do to help move this along?  I'd love to dive into
>  >  the code, I just need a little guidance!  I've written and debugged a
>  >  few Linux drivers in my day...
>  >
>  >  Any other testing you need, I'd be happy to assist.
>  >
>  >  Thanks,
>  >
>  >  Chris
>
>  We've recently committed fixes to 4965 rate scaling can you try the
>  latest version of wireless-testing kernel?
>
>

Not sure if I understand the terminology correctly (wireless-testing
kernel?) but I just tried the top-of-tree from git repo (iwlwifi) and
the results are the same.  Stuck at very low speed, and no apparent
activity on the rs_window /sys file.

Regards,

Chris

Re: Bug 1623

[Chris Hallinan]

On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.com> wrote:
> On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmail.com> wrote:
>  > http://bughost.org/bugzilla/show_bug.cgi?id=1623
>  >
>  >  Anything else I can do to help move this along?  I'd love to dive into
>  >  the code, I just need a little guidance!  I've written and debugged a
>  >  few Linux drivers in my day...
>  >
>  >  Any other testing you need, I'd be happy to assist.
>  >
>  >  Thanks,
>  >
>  >  Chris
>
>  We've recently committed fixes to 4965 rate scaling can you try the
>  latest version of wireless-testing kernel?
>
I was unable to get either 1.2.25 nor top-of-tree from git (iwlwifi)
to compile with wireless-testing kernel.

As another data point, it appears the iwl4965 operates at full speed
using a more up-to-date Wireless Access Point such as the
Cisco/Linksys WAP4400N.

Given that input, is there somewhere else we could look?  I will
update the bug record with these findings.

-Chris

Re: Bug 1623

[Tomas Winkler]

On Tue, Mar 11, 2008 at 1:50 AM, Chris Hallinan <challinan@gmail.com> wrote:
> On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.com> wrote:
>
> > On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmail.com> wrote:
>  >  > http://bughost.org/bugzilla/show_bug.cgi?id=1623
>  >  >
>  >  >  Anything else I can do to help move this along?  I'd love to dive into
>  >  >  the code, I just need a little guidance!  I've written and debugged a
>  >  >  few Linux drivers in my day...
>  >  >
>  >  >  Any other testing you need, I'd be happy to assist.
>  >  >
>  >  >  Thanks,
>  >  >
>  >  >  Chris
>  >
>  >  We've recently committed fixes to 4965 rate scaling can you try the
>  >  latest version of wireless-testing kernel?
>  >
>  I was unable to get either 1.2.25 nor top-of-tree from git (iwlwifi)
>  to compile with wireless-testing kernel.

I see, the point is that wireless-testing already contains latest
iwlwifi driver much newer then 1.2.25. so no need for patching just
compile the kernel.

>  As another data point, it appears the iwl4965 operates at full speed
>  using a more up-to-date Wireless Access Point such as the
>  Cisco/Linksys WAP4400N.

I'm not so familiar with the Linksys-B AP. Is it B-only AP?
I suspect there is a problem in rate scaling and we are going beyond
the CCK rates which B-only AP cannot hear.
but this is only shutting to darkness, need to reproduce.
I'm not sure if you have a sniffer but capture of traffic would be very useful.

>  Given that input, is there somewhere else we could look?  I will
>  update the bug record with these findings.

Can you put exact version of the AP to your bug description, including
software/firmware version.

Thanks
Tomas

Re: Bug 1623

[Luis R. Rodriguez]

On Tue, Mar 11, 2008 at 2:17 AM, Tomas Winkler <tomasw@gmail.com> wrote:
> On Tue, Mar 11, 2008 at 1:50 AM, Chris Hallinan <challinan@gmail.com> wrote:
>  > On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.com> wrote:
>  >
>  > > On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmail.com> wrote:
>  >  >  > http://bughost.org/bugzilla/show_bug.cgi?id=1623
>  >  >  >
>  >  >  >  Anything else I can do to help move this along?  I'd love to dive into
>  >  >  >  the code, I just need a little guidance!  I've written and debugged a
>  >  >  >  few Linux drivers in my day...
>  >  >  >
>  >  >  >  Any other testing you need, I'd be happy to assist.
>  >  >  >
>  >  >  >  Thanks,
>  >  >  >
>  >  >  >  Chris
>  >  >
>  >  >  We've recently committed fixes to 4965 rate scaling can you try the
>  >  >  latest version of wireless-testing kernel?
>  >  >
>  >  I was unable to get either 1.2.25 nor top-of-tree from git (iwlwifi)
>  >  to compile with wireless-testing kernel.
>
>  I see, the point is that wireless-testing already contains latest
>  iwlwifi driver much newer then 1.2.25. so no need for patching just
>  compile the kernel.

Or if you don't want to compile your kernel and just compile the
modules externally you can grab the compat-wireless-package that pulls
daily from wireless-testing:

http://linuxwireless.org/en/users/Download

  Luis

Re: Bug 1623

[Filippo Zangheri]

Luis R. Rodriguez ha scritto:
> On Tue, Mar 11, 2008 at 2:17 AM, Tomas Winkler <tomasw@gmail.com> wro=
te:
>> On Tue, Mar 11, 2008 at 1:50 AM, Chris Hallinan <challinan@gmail.com=
> wrote:
>>  > On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.com=
> wrote:
>>  >
>>  > > On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmai=
l.com> wrote:
>>  >  >  > http://bughost.org/bugzilla/show_bug.cgi?id=3D1623
>>  >  >  >
>>  >  >  >  Anything else I can do to help move this along?  I'd love =
to dive into
>>  >  >  >  the code, I just need a little guidance!  I've written and=
 debugged a
>>  >  >  >  few Linux drivers in my day...
>>  >  >  >
>>  >  >  >  Any other testing you need, I'd be happy to assist.
>>  >  >  >
>>  >  >  >  Thanks,
>>  >  >  >
>>  >  >  >  Chris
>>  >  >
>>  >  >  We've recently committed fixes to 4965 rate scaling can you t=
ry the
>>  >  >  latest version of wireless-testing kernel?
>>  >  >
>>  >  I was unable to get either 1.2.25 nor top-of-tree from git (iwlw=
ifi)
>>  >  to compile with wireless-testing kernel.
>>
>>  I see, the point is that wireless-testing already contains latest
>>  iwlwifi driver much newer then 1.2.25. so no need for patching just
>>  compile the kernel.
>=20
> Or if you don't want to compile your kernel and just compile the
> modules externally you can grab the compat-wireless-package that pull=
s
> daily from wireless-testing:
>=20
> http://linuxwireless.org/en/users/Download

I can confirm that. Building wireless drivers modules and subsystem
was never so easy and time-efficient.

Maybe this is useless, but if you want to avoid bulding all modules
and subsystems you just need to edit config.mk.

Great project!

Just my =E2=82=AC0.02.

--=20
=46ilippo Zangheri

GPG key ID: 0xE1D879FA
Key fingerprint: 816B CE57 D43C 0A47 EF35 3378 EA5F A72A E1D8 79FA
Key server: pgp.mit.edu

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GE d- s+:- a-- C++ UL+++ P+ L+++ E-- W+ N* o-- K- w--- O-- M--
V- PS++ PE+ Y+ PGP++ t 5-- X++ R* tv b+ DI-- D---- G-- e++ h--
r++ z*
------END GEEK CODE BLOCK------

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Re: Bug 1623

[Tomas Winkler]

On Tue, Mar 11, 2008 at 5:13 PM, Filippo Zangheri
<filippo.zangheri@yahoo.it> wrote:
> Luis R. Rodriguez ha scritto:
>
>
> > On Tue, Mar 11, 2008 at 2:17 AM, Tomas Winkler <tomasw@gmail.com> w=
rote:
>  >> On Tue, Mar 11, 2008 at 1:50 AM, Chris Hallinan <challinan@gmail.=
com> wrote:
>  >>  > On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.=
com> wrote:
>  >>  >
>  >>  > > On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@g=
mail.com> wrote:
>  >>  >  >  > http://bughost.org/bugzilla/show_bug.cgi?id=3D1623
>  >>  >  >  >
>  >>  >  >  >  Anything else I can do to help move this along?  I'd lo=
ve to dive into
>  >>  >  >  >  the code, I just need a little guidance!  I've written =
and debugged a
>  >>  >  >  >  few Linux drivers in my day...
>  >>  >  >  >
>  >>  >  >  >  Any other testing you need, I'd be happy to assist.
>  >>  >  >  >
>  >>  >  >  >  Thanks,
>  >>  >  >  >
>  >>  >  >  >  Chris
>  >>  >  >
>  >>  >  >  We've recently committed fixes to 4965 rate scaling can yo=
u try the
>  >>  >  >  latest version of wireless-testing kernel?
>  >>  >  >
>  >>  >  I was unable to get either 1.2.25 nor top-of-tree from git (i=
wlwifi)
>  >>  >  to compile with wireless-testing kernel.
>  >>
>  >>  I see, the point is that wireless-testing already contains lates=
t
>  >>  iwlwifi driver much newer then 1.2.25. so no need for patching j=
ust
>  >>  compile the kernel.
>  >
>  > Or if you don't want to compile your kernel and just compile the
>  > modules externally you can grab the compat-wireless-package that p=
ulls
>  > daily from wireless-testing:
>  >
>  > http://linuxwireless.org/en/users/Download
>
>  I can confirm that. Building wireless drivers modules and subsystem
>  was never so easy and time-efficient.
>
>  Maybe this is useless, but if you want to avoid bulding all modules
>  and subsystems you just need to edit config.mk.
>
>  Great project!
>
>  Just my =800.02.
>
>  --
>  Filippo Zangheri
>
>  GPG key ID: 0xE1D879FA
>  Key fingerprint: 816B CE57 D43C 0A47 EF35 3378 EA5F A72A E1D8 79FA
>  Key server: pgp.mit.edu
>
>  -----BEGIN GEEK CODE BLOCK-----
>  Version: 3.12
>  GE d- s+:- a-- C++ UL+++ P+ L+++ E-- W+ N* o-- K- w--- O-- M--
>  V- PS++ PE+ Y+ PGP++ t 5-- X++ R* tv b+ DI-- D---- G-- e++ h--
>  r++ z*
>  ------END GEEK CODE BLOCK------
>
>

Chris
If you are able to get running wireless-testing can you just dump
debugfs rate_scale_table file.  Since it's run time data it has to be
done while preforming the test.

The file is usually located under
/sys/kernel/debug/ieee80211/phy0/stations/<AP mac
address>/rate_scale_table

Thanks
Tomas

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>  To unsubscribe from this list: send the line "unsubscribe linux-wire=
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Re: Bug 1623

[Chris Hallinan]

On Tue, Mar 11, 2008 at 2:17 AM, Tomas Winkler <tomasw@gmail.com> wrote:
> On Tue, Mar 11, 2008 at 1:50 AM, Chris Hallinan <challinan@gmail.com> wrote:
>  > On Mon, Mar 10, 2008 at 11:05 AM, Tomas Winkler <tomasw@gmail.com> wrote:
>  >
>  > > On Mon, Mar 10, 2008 at 4:02 PM, Chris Hallinan <challinan@gmail.com> wrote:
>  >  >  > http://bughost.org/bugzilla/show_bug.cgi?id=1623
>  >  >  >
>  >  >  >  Anything else I can do to help move this along?  I'd love to dive into
>  >  >  >  the code, I just need a little guidance!  I've written and debugged a
>  >  >  >  few Linux drivers in my day...
>  >  >  >
>  >  >  >  Any other testing you need, I'd be happy to assist.
>  >  >  >
>  >  >  >  Thanks,
>  >  >  >
>  >  >  >  Chris
>  >  >
>  >  >  We've recently committed fixes to 4965 rate scaling can you try the
>  >  >  latest version of wireless-testing kernel?
>  >  >
>  >  I was unable to get either 1.2.25 nor top-of-tree from git (iwlwifi)
>  >  to compile with wireless-testing kernel.
>
>  I see, the point is that wireless-testing already contains latest
>  iwlwifi driver much newer then 1.2.25. so no need for patching just
>  compile the kernel.

OK, sorry for the confusion, iwl4965 was not enabled by default, and I
assumed it was not there.
I've completed the test, wireless-testing kernel from two days ago
does not resolve the slow wireless connection.  I will update the bug
report with this data.

>
>
>  >  As another data point, it appears the iwl4965 operates at full speed
>  >  using a more up-to-date Wireless Access Point such as the
>  >  Cisco/Linksys WAP4400N.
>
>  I'm not so familiar with the Linksys-B AP. Is it B-only AP?
>  I suspect there is a problem in rate scaling and we are going beyond
>  the CCK rates which B-only AP cannot hear.
>  but this is only shutting to darkness, need to reproduce.
>  I'm not sure if you have a sniffer but capture of traffic would be very useful.

It's an old Wireless-B unit, so I can only guess it's 'B' only.  It is
a Linksys WAP11 Ver. 2.0
Firmware: v2.05, Aug. 04, 2003.  Unfortunately, the hotels and coffee
shops around the country are filled with these units, and I travel for
a living, so I'm holding out hopes for a solution, and stand ready to
help in any way I can.

Again, I will update the bug report with this data.

Regards,

Chris