Messages in this thread | | | Date | Thu, 10 Dec 2009 09:06:08 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] softirq,tracing: enable to trace softirq raise latency |
| |
* Lai Jiangshan <laijs@cn.fujitsu.com> wrote:
> Rebase it for the newly codes > Collect Acks(Acked-by Mathieu Desnoyers and Frederic Weisbecker) > > > From: Lai Jiangshan <laijs@cn.fujitsu.com> > > Add a tracepoint for tracing when softirq action is raised. > > It and the existed tracepoints complete softirq's tracepoints: > softirq_raise, softirq_entry and softirq_exit. > > And when this tracepoint is used in combination with > the softirq_entry tracepoint we can determine > the softirq raise latency. > > Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> > Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> > Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
ok, it would be nice to expose this functionality via some sort of 'perf trace --irqlatency' (or perhaps a separate 'perf irq record' 'perf irq trace' tool) so that users/developers can make use of this new event and that we can check that it works and latencies are correct, etc.
Ingo
| |