TRACE_SOFTIRQ_ENTRY(9) IRQ TRACE_SOFTIRQ_ENTRY(9)NAME
trace_softirq_entry - called immediately before the softirq handler
SYNOPSIS
void trace_softirq_entry(struct softirq_action * h,
struct softirq_action * vec);
ARGUMENTS
h
pointer to struct softirq_action
vec
pointer to first struct softirq_action in softirq_vec array
DESCRIPTION
The h parameter, contains a pointer to the struct softirq_action which
has a pointer to the action handler that is called. By subtracting the
vec pointer from the h pointer, we can determine the softirq number.
Also, when used in combination with the softirq_exit tracepoint we can
determine the softirq latency.
AUTHOR
Jason Baron <jbaron@redhat.com>
Author.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 TRACE_SOFTIRQ_ENTRY(9)