trace_irq_handler_entry (9) Linux Manual Page
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.