1.41 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