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.
AUTHORS
Jason Baron <jbaron@redhat.com>
Author.
William Cohen <wcohen@redhat.com>
Author.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 TRACE_SOFTIRQ_ENTRY(9)
