DISPLAY INTERRUPTS

Purpose

Use to display currently assigned hardware interrupts, interrupt handlers (also called Interrupt Service Routines or ISRs), and interrupt statistics.

Syntax

DISPLAY INTERRUPTS [option]

Option	Use to
(no option)	Display interrupts currently in use.
n ...	Display one or more interrupts by number.
ALL	Display all interrupts.
PROC	Display per-processor interrupt information.
ALLOC	Display allocated interrupts.
REAL	Display interrupts that occurred while the OS was in real mode and that were then reflected back to protected mode to be serviced.

Using DISPLAY INTERRUPTS

When a processor is taken offline or when an interrupt handler (ISR) is removed, the detailed statistics pertaining to that processor or interrupt handler are, by default, removed from memory.

To retain per-processor interrupt handler statistics for offline processors or to retain the total interrupt contribution from a previously loaded handler, change the SET parameter Set Auto Clear Interrupt Statistics to OFF.

Examples

To display interrupts currently in use, enter DISPLAY INTERRUPTS with no options. The display is similar to the following sample:

Total Interrupt Count For All Processors: 940208

Interrupt 0: OS Allocated Bus Interrupt 292828  
Interrupt Handler: Timer 0 Interrupt Handler

Interrupt 1: OS Allocated Bus Interrupt 375  
Interrupt Handler: Keyboard Interrupt Handler 375

Interrupt 5: OS Allocated Bus Interrupt 86229  
Interrupt Handler: E100B Hardware ISR 94829

Interrupt 9: OS Allocated Bus Interrupt 30691  
Interrupt Handler: NPA Environment 30691

Interrupt 12: OS Allocated Bus Interrupt 1299  
Interrupt Handler: PS/2 Mouse Port Interrupt 1299

Interrupt 39: MPS14.PSM Allocated Local Interrupt 0  
Interrupt Handler: APIC Spurious Interrupt Handler

Additional Information

Topic	See
Registered system interrupts and interrupt information	MONITOR Available Options > Kernel > Interrupts