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Network Device Auto-configuraiton delay tuning

kiran babu
Intellectual 265 points

Other Parts Discussed in Thread: TMS320DM365

 

Hi,

I am using embedded linux kernel with version 2.6.18 (got as a part of dvsdk_2_10_01_18 software for TMS320DM365 Target board).

In kernel source code ,in auto configuration of network devices, it is observed that a delay of about 500 msec before opening the devices and a delay of 1 sec after closing is observed  for allowing the hardware registers to settle down and have a error free operation.

To have a faster operation of network devices and to have a reduction in kernel boot up time, i want to tune these pre and post delays.

Can any one tell me :

  • What is the exact time to be observed before opening and after closing of the devices?
  • To what lower values can these pre and post values be reduced to?

Note:

  • It is observed that pre delays reduced till 100msec and post delays upto 500 msec are working fine , but further reduction in time had made the system behaviour undefined.

Thanks in advance,

Kiran.