| From: |
| Peter Zijlstra <a.p.zijlstra@chello.nl> |
| To: |
| mingo@elte.hu, paulus@samba.org, rostedt@goodmis.org |
| Subject: |
| [PATCH 00/10] tracepoint perf counter events and new ABI |
| Date: |
| Thu, 19 Mar 2009 20:26:10 +0100 |
| Message-ID: |
| <20090319192610.660857280@chello.nl> |
| Cc: |
| linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl> |
| Archive‑link: | |
Article |
These patches change the event tracer to provide id files:
[root@opteron ~]# for i in /debug/tracing/events/irq/*/id; do echo `cat $i` - $i; done
28 - /debug/tracing/events/irq/irq_handler_entry/id
29 - /debug/tracing/events/irq/irq_handler_exit/id
27 - /debug/tracing/events/irq/softirq_entry/id
26 - /debug/tracing/events/irq/softirq_exit/id
These can then be used in profiling as:
[root@opteron linux-2.6]# ~/perfstat -e 2:28 make O=native-build/ -j4 lib
...
Performance counter stats for 'make':
18280.657602 task clock ticks (msecs)
465 tp: 28 (events)
Wall-clock time elapsed: 11265.199196 msecs
Showing that we had 465 irq_handler_entry events during that workload.
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