Re: [PATCH] PERF(kernel): Cleanup power events V2

Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> · Tue, 26 Oct 2010 09:04:19 -0700

On 10/26/2010 8:32 AM, Pierre Tardy wrote:

On Tue, Oct 26, 2010 at 2:10 AM, Ingo Molnar<mingo@xxxxxxx>  wrote:

How will future PCI (or other device) power saving tracepoints be called?

Might be more consistent to use:

  power:cpu_idle
  power:machine_idle
  power:device_idle

Agree with this.

FYI, I have a runtime_pm tracepoint currently cooking. Here is
preliminary patch.
Can this be a candidate for a "power:device_idle" tracepoint?

I would like to see a slightly more advanced tracepoint do the runtime 

pm framework;

specifically I'd like to see the "comm" of the process that's taking a 

refcount on a device

(that way, powertop can track which process keeps a device busy)

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