Linux Plumbers Conf 2013

One Line Summary

Abstract

In many cases when the kernel needs to make a decision related to power management (for example, which low-power state or what performance state of a device or processor to use in the given situation), it may benefit from knowing what the needs of user space regarding performance or capacity to process data or acceptable latencies are going to be in the near future. However, interfaces available to user space for passing that kind of information seem to be inadequate and the question arises if they should be improved and, if so, in what way.

Tags

power management, power, user space, cpu, pm, device, interface

Presentation Materials

Speaker

• 

  Rafael Wysocki

  Intel OTC
  Biography

  I am the maintainer of the Linux kernel’s core power management code (PM core), cpuidle, cpufreq, and the ACPI subsystem. I work at Intel Open Source Technology Center as a Software Engineer with focus on the Linux kernel. I have been actively contributing to the Linux kernel since January 2005, working on the suspend and hibernate subsystem, on power management in general (including runtime PM, PM QoS etc.), and on the ACPI and PCI subsystems.

  Sessions

  • * ACPI-based Hotplug of PCI and Other Devices
    • Title: ACPI-based Hotplug of PCI and Other Devices
    • Microconference: ACPI/PM, PCI subsystems I
    • Time: 10:15am
    • One Line Summary:

      Discussion on the status of support for ACPI-based hotplug of devices in the Linux kernel

    • slides
    • Speakers: Rafael Wysocki
  • * PCIe Native Hotplug Integration with ACPI-Based Hotplug
    • Title: PCIe Native Hotplug Integration with ACPI-Based Hotplug
    • Microconference: ACPI/PM, PCI subsystems I
    • Time: 9:50am
    • One Line Summary:

      Discussion on how to integrate the native PCIe hotplug (pciehp) with ACPI-based PCI hotplug (acpiphp).

    • slides
    • Speakers: Rafael Wysocki
  • * PM Interfaces Between User Space and the Kernel
    • Title: PM Interfaces Between User Space and the Kernel
    • Microconference: ACPI/PM, PCI subsystems I
    • Time: 11:05am
    • One Line Summary:

      Discussion on interfaces to use for communicating the needs of user space related to power management to the kernel.

    • slides
    • Speakers: Rafael Wysocki
  • * ACPI vs DT
    • Title: ACPI vs DT
    • Microconference: ACPI/PM, PCI subsystems II
    • One Line Summary:

      ACPI vs Device Tree – Moving Forward: Discussion on device enumeration methods

    • Speakers: Rafael Wysocki