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Boot Time Reduction , LPJ

kiran babu
Intellectual 265 points
Other Parts Discussed in Thread: TMS320DM365

Hi ,

I am using dvsdk_2_10_01_18 for davincii processor TMS320DM365 (arm architecture).  My linux kernel image built using dvsdk is taking 6.735 secs with the loops per jiffy ( lpj) value 741376 , the standard value specified for ARM architecture. To reduce the boot time we tuned the lpj value to a lower values. It is observed that as lpj value is lowered, the boot time is getting reduced.

Can any one tell me ,

  • Will lower values of LPJ can  effect the performance for my processor (any video capture functionality , or some peripheral functionality) ?
  • To what lower value can the lpj value be reduced , with out compramising the performance?

Note:

We observed  application working fine with out any problems, even with lower lpj values of around 1400

 

Thanks in advance,

kiran.

  • 0
    Guru 31670 points

    Kiran,

    If you reduce lpj value boot time can reduce, but it can have some side effects in some drivers. Basically it will reduce the accuracy of delay loops inside the kernel, there by reducing the boot time. There are other better ways for reducing boot time rather than reducing the lpj value.

    -Renjith

    www.pathpartnertech.com