New and Changed Commands

All kernel debugger commands work as before, but a few have been modified to display or use multiprocessor-specific information. New commands have also been added.

The new and changed commands are:

• DP (processor status)
  The .DP command has been added to dump out a processor control block verbosely, that is, to display a processor's status. The command takes as an argument:
  • Displays status based on the real current slot
    
  • Displays status based on the currently selected slot
    
  • based processor number
    Displays status for a specific processor. .DP 3 would display the status of processor 3.
    blank
    Displays the status of all processors.
    .DL (display processor spinlocks)
    The .DL command has been added to display the spinlocks owned by a particular processor. Valid arguments are:
    • Displays spinlocks based on the real current slot #
      Displays spinlocks based on the currently selected slot
      0-based processor number
      Displays spinlocks for a specific processor. .DL 1 would display the spinlocks held on processor 1.
      Address of a spinlock
      Displays a specific spinlock.
      blank
      Displays all spinlocks.
      .DS
      Dumps the Inter-Processor Interrupt (IPI) statistics for each processor, including the IPI type and IPI delivery method.
      .DSH
      Dumps the IPI history, which is the last 256 IPIs generated in the system. The source, destination, and type of the IPI are displayed as well as the IPI delivery method and the address and symbol name where the IPI was generated.
      .PQ
      Dumps the scheduler's priority queues based on the debugger's slot number.
      .R and R (register commands)
      The register commands have been enhanced to indicate which processor the currently selected slot is running on. This information is displayed at the end of the third register line in the form p=xxyy where xx is the 1-based processor number, and yy are the flags. A processor number of 00 means that the currently selected slot is not running on any processor, or is blocked. The flags are:

      s

      processor is currently spinning.
      r
      processor is attempting to grab the ring 0 suspend lock.
      .SS (change current slot)
      The .SS command has been modified to reference the proper PSA (processor save area) when displaying a variable on a different processor. value of that variable on that particular processor).
      .S
      The .S command is now identical to the .SS command. The PLMA is displayed properly for each processor.

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