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Altera_Forum's avatar
Altera_Forum
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21 years ago

uCOS + LWIP limit TCP/IP to 60% of cpu power

Dear All,

I want to use Nios II with the RTOS and have it running as TCP/IP server.

BUT I want to limit the processing power used by the TCP/IP server to 60%.

Is this possible and if so can someone give me a small intro how it is done (I'll

dig up the details myself).

I am new to OS systems.

If you know how to do it without the OS, OK for me, just explain how.

Thank you all,

Greg

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    21 years ago

    Hello Greg,

    MicroC-OS/II is a pre-emptive multi-tasking kernel. You can set the priority of the TCP and RX LWIP tasks to be lower than more important tasks. So, if you have a task which you want to run 40% of the time, leaving the remaining LWIP tasks to run during the remaining 60% time, simply create your higher priority task with a priority level above the LWIP tasks. If this higher priority 40% CPU consuming task would otherwise execute constantly, you can have that task give up CPU control by delaying for a fixed time period, thus allowing the MicroC-OS/II RTOS to schedule some time for the lower priority LWIP tasks to run.

    Best regards,

    Stephen O'Reilly

    Altera Embedded Applications Engineering