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trace_irq_handler_entry(9) - phpMan

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TRACE_IRQ_HANDLER_EN(9)                        IRQ                        TRACE_IRQ_HANDLER_EN(9)



NAME
       trace_irq_handler_entry - called immediately before the irq action handler

SYNOPSIS
       void trace_irq_handler_entry(int irq, struct irqaction * action);

ARGUMENTS
       irq
           irq number

       action
           pointer to struct irqaction

DESCRIPTION
       The struct irqaction pointed to by action contains various information about the handler,
       including the device name, action->name, and the device id, action->dev_id. When used in
       conjunction with the irq_handler_exit tracepoint, we can figure out irq handler latencies.

AUTHORS
       Jason Baron <jbaron AT redhat.com>
           Author.

       William Cohen <wcohen AT redhat.com>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   TRACE_IRQ_HANDLER_EN(9)


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