Re: Cache issue with BBB networking

[ragu nath]

Hi Marcos,

As far as I know, cache is enabled in Freebsd.

Thanks,
Ragunath

On Tue, Jun 30, 2015 at 7:14 PM, Marcos Díaz <
marcos.d...@tallertechnologies.com> wrote:

> I have a question about this, the frebsd driver, was prepared to be used
> with cache enabled?
> I mean, in freeBSD OS the cache is enabled?
>
> On Tue, Jun 30, 2015 at 12:46 AM, Daniel Gutson <
> daniel.gut...@tallertechnologies.com> wrote:
>
>> Ragu,
>>
>>Please ensure that you are getting cache coherence right. That is,
>> there are no packets crossing the cache lines.
>> FWIW, in a life ago, i got a problem with an eth driver where the
>> descriptors ring was not properly sized (ie no modulus cache line).
>> El 29/6/2015 17:23, "ragu nath"  escribió:
>>
>>> Thanks Marcos. I will let you know if there is any progress.
>>>
>>> Regards,
>>> Ragunath
>>>
>>> On Tue, Jun 30, 2015 at 12:50 AM, Marcos Díaz <
>>> marcos.d...@tallertechnologies.com> wrote:
>>>
 Hi,
 I'm sorry but in the development of the porting of LWIP i couldn't give
 any more time to the task, so when I reached that stage I just disabled the
 cache.
 I will try to give some time to that to see if i can help you, and of
 course, let me know if you find something.
 Sorry again

 On Mon, Jun 29, 2015 at 3:16 PM, ragu nath 
 wrote:

> Hi Marcos,
>
> I am working on porting ethernet driver for Beaglebone black from
> FreeBSD to rtems-libbsd as part of GSOC 2015. I ported the driver and
> got it working.
>
> But there was one issue I faced, similar to the one you mentioned in
> our earlier correspondence (regarding lwIP). You mentioned that the
> system crashes if cache is enabled.
>
> In my case, the Address Lookup Engine (ALE) is getting corrupted if
> cache is enabled. Because of this packet transmission failed sending
> out random junk packets. With cache disabled, networking is working.
>
> I am looking for options other than disabling cache as a whole. Is
> there any other option available?  Can you share the details of any of
> the things you tried and found not working?
>
>
> Thanks,
> Ragunath
>



 --

 __

 


 Marcos Díaz

 Software Engineer


 San Lorenzo 47, 3rd Floor, Office 5

 Córdoba, Argentina


 Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452

 Skype: markdiaz22


>>>
>>>
>>> --
>>> ragu
>>>
>>
>
>
> --
>
> __
>
> 
>
>
> Marcos Díaz
>
> Software Engineer
>
>
> San Lorenzo 47, 3rd Floor, Office 5
>
> Córdoba, Argentina
>
>
> Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
>
> Skype: markdiaz22
>
>


-- 
ragu
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Re: Cache issue with BBB networking

[Marcos Díaz]

I have a question about this, the frebsd driver, was prepared to be used
with cache enabled?
I mean, in freeBSD OS the cache is enabled?

On Tue, Jun 30, 2015 at 12:46 AM, Daniel Gutson <
daniel.gut...@tallertechnologies.com> wrote:

> Ragu,
>
>Please ensure that you are getting cache coherence right. That is,
> there are no packets crossing the cache lines.
> FWIW, in a life ago, i got a problem with an eth driver where the
> descriptors ring was not properly sized (ie no modulus cache line).
> El 29/6/2015 17:23, "ragu nath"  escribió:
>
>> Thanks Marcos. I will let you know if there is any progress.
>>
>> Regards,
>> Ragunath
>>
>> On Tue, Jun 30, 2015 at 12:50 AM, Marcos Díaz <
>> marcos.d...@tallertechnologies.com> wrote:
>>
>>> Hi,
>>> I'm sorry but in the development of the porting of LWIP i couldn't give
>>> any more time to the task, so when I reached that stage I just disabled the
>>> cache.
>>> I will try to give some time to that to see if i can help you, and of
>>> course, let me know if you find something.
>>> Sorry again
>>>
>>> On Mon, Jun 29, 2015 at 3:16 PM, ragu nath 
>>> wrote:
>>>
 Hi Marcos,

 I am working on porting ethernet driver for Beaglebone black from
 FreeBSD to rtems-libbsd as part of GSOC 2015. I ported the driver and
 got it working.

 But there was one issue I faced, similar to the one you mentioned in
 our earlier correspondence (regarding lwIP). You mentioned that the
 system crashes if cache is enabled.

 In my case, the Address Lookup Engine (ALE) is getting corrupted if
 cache is enabled. Because of this packet transmission failed sending
 out random junk packets. With cache disabled, networking is working.

 I am looking for options other than disabling cache as a whole. Is
 there any other option available?  Can you share the details of any of
 the things you tried and found not working?


 Thanks,
 Ragunath

>>>
>>>
>>>
>>> --
>>>
>>> __
>>>
>>> 
>>>
>>>
>>> Marcos Díaz
>>>
>>> Software Engineer
>>>
>>>
>>> San Lorenzo 47, 3rd Floor, Office 5
>>>
>>> Córdoba, Argentina
>>>
>>>
>>> Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
>>>
>>> Skype: markdiaz22
>>>
>>>
>>
>>
>> --
>> ragu
>>
>


-- 

__




Marcos Díaz

Software Engineer


San Lorenzo 47, 3rd Floor, Office 5

Córdoba, Argentina


Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452

Skype: markdiaz22
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Re: Cache issue with BBB networking

[Daniel Gutson]

Ragu,

   Please ensure that you are getting cache coherence right. That is, there
are no packets crossing the cache lines.
FWIW, in a life ago, i got a problem with an eth driver where the
descriptors ring was not properly sized (ie no modulus cache line).
El 29/6/2015 17:23, "ragu nath"  escribió:

> Thanks Marcos. I will let you know if there is any progress.
>
> Regards,
> Ragunath
>
> On Tue, Jun 30, 2015 at 12:50 AM, Marcos Díaz <
> marcos.d...@tallertechnologies.com> wrote:
>
>> Hi,
>> I'm sorry but in the development of the porting of LWIP i couldn't give
>> any more time to the task, so when I reached that stage I just disabled the
>> cache.
>> I will try to give some time to that to see if i can help you, and of
>> course, let me know if you find something.
>> Sorry again
>>
>> On Mon, Jun 29, 2015 at 3:16 PM, ragu nath 
>> wrote:
>>
>>> Hi Marcos,
>>>
>>> I am working on porting ethernet driver for Beaglebone black from
>>> FreeBSD to rtems-libbsd as part of GSOC 2015. I ported the driver and
>>> got it working.
>>>
>>> But there was one issue I faced, similar to the one you mentioned in
>>> our earlier correspondence (regarding lwIP). You mentioned that the
>>> system crashes if cache is enabled.
>>>
>>> In my case, the Address Lookup Engine (ALE) is getting corrupted if
>>> cache is enabled. Because of this packet transmission failed sending
>>> out random junk packets. With cache disabled, networking is working.
>>>
>>> I am looking for options other than disabling cache as a whole. Is
>>> there any other option available?  Can you share the details of any of
>>> the things you tried and found not working?
>>>
>>>
>>> Thanks,
>>> Ragunath
>>>
>>
>>
>>
>> --
>>
>> __
>>
>> 
>>
>>
>> Marcos Díaz
>>
>> Software Engineer
>>
>>
>> San Lorenzo 47, 3rd Floor, Office 5
>>
>> Córdoba, Argentina
>>
>>
>> Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
>>
>> Skype: markdiaz22
>>
>>
>
>
> --
> ragu
>
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Re: Cache issue with BBB networking

[ragu nath]

Thanks Marcos. I will let you know if there is any progress.

Regards,
Ragunath

On Tue, Jun 30, 2015 at 12:50 AM, Marcos Díaz <
marcos.d...@tallertechnologies.com> wrote:

> Hi,
> I'm sorry but in the development of the porting of LWIP i couldn't give
> any more time to the task, so when I reached that stage I just disabled the
> cache.
> I will try to give some time to that to see if i can help you, and of
> course, let me know if you find something.
> Sorry again
>
> On Mon, Jun 29, 2015 at 3:16 PM, ragu nath  wrote:
>
>> Hi Marcos,
>>
>> I am working on porting ethernet driver for Beaglebone black from
>> FreeBSD to rtems-libbsd as part of GSOC 2015. I ported the driver and
>> got it working.
>>
>> But there was one issue I faced, similar to the one you mentioned in
>> our earlier correspondence (regarding lwIP). You mentioned that the
>> system crashes if cache is enabled.
>>
>> In my case, the Address Lookup Engine (ALE) is getting corrupted if
>> cache is enabled. Because of this packet transmission failed sending
>> out random junk packets. With cache disabled, networking is working.
>>
>> I am looking for options other than disabling cache as a whole. Is
>> there any other option available?  Can you share the details of any of
>> the things you tried and found not working?
>>
>>
>> Thanks,
>> Ragunath
>>
>
>
>
> --
>
> __
>
> 
>
>
> Marcos Díaz
>
> Software Engineer
>
>
> San Lorenzo 47, 3rd Floor, Office 5
>
> Córdoba, Argentina
>
>
> Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
>
> Skype: markdiaz22
>
>


-- 
ragu
___
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Re: Cache issue with BBB networking

[Marcos Díaz]

Hi,
I'm sorry but in the development of the porting of LWIP i couldn't give any
more time to the task, so when I reached that stage I just disabled the
cache.
I will try to give some time to that to see if i can help you, and of
course, let me know if you find something.
Sorry again

On Mon, Jun 29, 2015 at 3:16 PM, ragu nath  wrote:

> Hi Marcos,
>
> I am working on porting ethernet driver for Beaglebone black from
> FreeBSD to rtems-libbsd as part of GSOC 2015. I ported the driver and
> got it working.
>
> But there was one issue I faced, similar to the one you mentioned in
> our earlier correspondence (regarding lwIP). You mentioned that the
> system crashes if cache is enabled.
>
> In my case, the Address Lookup Engine (ALE) is getting corrupted if
> cache is enabled. Because of this packet transmission failed sending
> out random junk packets. With cache disabled, networking is working.
>
> I am looking for options other than disabling cache as a whole. Is
> there any other option available?  Can you share the details of any of
> the things you tried and found not working?
>
>
> Thanks,
> Ragunath
>



-- 

__




Marcos Díaz

Software Engineer


San Lorenzo 47, 3rd Floor, Office 5

Córdoba, Argentina


Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452

Skype: markdiaz22
___
devel mailing list
devel@rtems.org
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