2009-05-16 21:17:14     Cache problem with tun-device

Document created by Aaronwu Employee on Aug 15, 2013
Version 1Show Document
  • View in full screen mode

2009-05-16 21:17:14     Cache problem with tun-device

Patrick Hotz (GERMANY)

Message: 74136   

 

Hi,

 

i have a problem using the virtual TUN/TAP device and a software which is using cache.

But fist to my system:

          uClinux2008R1 (TUN/TAP-Device Vers. 1.6)

          special software for VoIP which is using much of cach for better performance

          modified bfin_mac.c driver for Network without IP-Chacksum located in Cach

 

 

 

My problem is following:

If i run openVPN without the other program everything works ok,

but if i start the software and afterwards the openVPN which is using the TAP device i get a kernel panic (i will append the log tomorrow because i´m not in office)

I think it is a problem with the cach.

 

Is it possible to modifi the tun.c to get running without any access into Cach?

Thank you very much.

 

Patrick

TranslateQuoteReplyEditDelete

 

 

2009-05-16 21:20:20     Re: Cache problem with tun-device

Mike Frysinger (UNITED STATES)

Message: 74137   

 

sorry, but what cache exactly are you talking about ?  the Blackfin L1 cache ?

QuoteReplyEditDelete

 

 

2009-05-16 21:23:40     Re: Cache problem with tun-device

Patrick Hotz (GERMANY)

Message: 74138   

 

Hello Mike,

 

yes, i talk about the L1

TranslateQuoteReplyEditDelete

 

 

2009-05-16 21:42:55     Re: Cache problem with tun-device

Mike Frysinger (UNITED STATES)

Message: 74139   

 

there is no way to selectively control what goes into L1 cache

QuoteReplyEditDelete

 

 

2009-05-17 02:51:04     Re: Cache problem with tun-device

Frank Van Hooft (CANADA)

Message: 74142   

 

Are you talking about L1 memory?  Are you getting a panic because your application is requesting more L1 memory than is available?

Attachments

    Outcomes