trace_softirq_entry

Langue: en

Version: October 2010 (fedora - 01/12/10)

Section: 9 (Appels noyau Linux)

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.