| 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.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |