]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
tracing, genirq: add irq enter and exit trace events
authorJason Baron <jbaron@redhat.com>
Thu, 26 Feb 2009 15:11:05 +0000 (10:11 -0500)
committerIngo Molnar <mingo@elte.hu>
Thu, 26 Feb 2009 17:43:50 +0000 (18:43 +0100)
commitaf39241b90a345556b8884adff87096afe71b050
treea913e3f15b1fb91555b5cb5899270274ce4c2c46
parent8656e7a2fa6afcd8682990f804a2a9674568738f
tracing, genirq: add irq enter and exit trace events

Impact: add new tracepoints

Add them to the generic IRQ code, that way every architecture
gets these new tracepoints, not just x86.

Using Steve's new 'TRACE_FORMAT', I can get function graph
trace as follows using the original two IRQ tracepoints:

 3)               |    handle_IRQ_event() {
 3)               |    /* (irq_handler_entry) irq=28 handler=eth0 */
 3)               |    e1000_intr_msi() {
 3)   2.460 us    |      __napi_schedule();
 3)   9.416 us    |    }
 3)               |    /* (irq_handler_exit) irq=28 handler=eth0 return=handled */
 3) + 22.935 us   |  }

Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/trace/irq.h [new file with mode: 0644]
include/trace/irq_event_types.h [new file with mode: 0644]
kernel/irq/handle.c
kernel/trace/events.c