genode/repos
Martin Stein 8f9355b360 thread API & CPU session: accounting of CPU quota
In the init configuration one can configure the donation of CPU time via
'resource' tags that have the attribute 'name' set to "CPU" and the
attribute 'quantum' set to the percentage of CPU quota that init shall
donate. The pattern is the same as when donating RAM quota.

! <start name="test">
!   <resource name="CPU" quantum="75"/>
! </start>

This would cause init to try donating 75% of its CPU quota to the child
"test".  Init and core do not preserve CPU quota for their own
requirements by default as it is done with RAM quota.

The CPU quota that a process owns can be applied through the thread
constructor. The constructor has been enhanced by an argument that
indicates the percentage of the programs CPU quota that shall be granted
to the new thread. So 'Thread(33, "test")' would cause the backing CPU
session to try to grant 33% of the programs CPU quota to the thread
"test". By now, the CPU quota of a thread can't be altered after
construction. Constructing a thread with CPU quota 0 doesn't mean the
thread gets never scheduled but that the thread has no guaranty to receive
CPU time. Such threads have to live with excess CPU time.

Threads that already existed in the official repositories of Genode were
adapted in the way that they receive a quota of 0.

This commit also provides a run test 'cpu_quota' in base-hw (the only
kernel that applies the CPU-quota scheme currently). The test basically
runs three threads with different physical CPU quota. The threads simply
count for 30 seconds each and the test then checks wether the counter
values relate to the CPU-quota distribution.

fix #1275
2014-11-28 12:02:37 +01:00
..
base thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-codezero thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-fiasco thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-foc thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-host thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-hw thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-linux thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-nova thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-okl4 thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
base-pistachio thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
dde_ipxe dde_ipxe: add Intel I217-LM PCI ID 2014-08-18 13:26:48 +02:00
dde_linux wifi_drv: Port of the Linux wireless stack 2014-11-28 12:02:36 +01:00
dde_oss dde_oss: use dde_kit_timer_ticks 2014-11-28 12:02:37 +01:00
dde_rump rump: Use shared library interface 2014-11-12 14:44:15 +01:00
demo demo/scout: alpha-surface support for icon_painter 2014-10-13 15:21:54 +02:00
gems gems: launcher application 2014-10-13 15:21:55 +02:00
hello_tutorial Move repositories to 'repos/' subdirectory 2014-05-14 16:08:00 +02:00
libports thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
os thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
ports thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
ports-foc thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
qt4 thread API & CPU session: accounting of CPU quota 2014-11-28 12:02:37 +01:00
README Move repositories to 'repos/' subdirectory 2014-05-14 16:08:00 +02:00

README

                      ===============================
                      Genode source-code repositories
                      ===============================


This directory contains the source-code repositories of the Genode OS
Framework. Each sub directory has the same principle layout as described in the
build-system manual:

:Build-system manual:

  [http://genode.org/documentation/developer-resources/build_system]

The build system uses a configurable selection of those reposities to obtain
the source codes for the build process. The repositories are not independent
but build upon of each other:

:'base':

  This directory contains the source-code repository of the fundamental
  frameworks and interfaces of Genode. Furthermore, it contains the generic
  parts of core.

:'base-<platform>':
  These directories contain platform-specific source-code repositories
  complementing the 'base' repository. The following platforms are supported:

  :'linux':
    Linux kernel (both x86_32 and x86_64)

  :'nova':
    NOVA hypervisor developed at University of Technology Dresden
    See [http://genode.org/documentation/platforms/nova]

  :'foc':
    Fiasco.OC is a modernized version of the Fiasco microkernel with a
    completely revised kernel interface fostering capability-based
    security. It is not compatible with L4/Fiasco.
    See [http://genode.org/documentation/platforms/foc]

  :'hw':
    The hw platform allows the execution of Genode on bare ARM hardware
    without the need for a separate kernel. The kernel functionality is
    included in core.
    See [http://genode.org/documentation/platforms/hw]

  :'okl4':
    OKL4 kernel (x86_32 and ARM) developed at Open-Kernel-Labs.
    See [http://genode.org/documentation/platforms/okl4]

  :'pistachio':
    L4ka::Pistachio kernel developed at University of Karlsruhe.
    See [http://genode.org/documentation/platforms/pistachio]

  :'fiasco':
    L4/Fiasco kernel developed at University of Technology Dresden.
    See [http://genode.org/documentation/platforms/fiasco]

  :'codezero':
    Codezero microkernel developed by B-Labs
    See [http://genode.org/documentation/platforms/codezero]

  :'host':
    Pseudo platform documenting the interface between the generic and
    platform-specific parts of the base framework. This is not a functional
    base platform.

:'os':

  This directory contains the non-base OS components such as the init process,
  device drivers, and basic system services.

:'demo':

  This directory contains the source-code repository of various services and
  applications that we use for demonstration purposes. For example, a graphical
  application launcher called Launchpad and the Scout tutorial browser.

:'hello_tutorial':

  Tutorial for creating a simple client-server scenario with Genode. This
  repository includes documentation and the complete source code.

:'libports':

  This source-code repository contains ports of popular open-source libraries
  to Genode, most importantly the C library. The repository contains no
  upstream source code but means to download the code and adapt it to Genode.
  For instructions about how to use this mechanism, please consult the README
  file at the top level of the repository. Among the 3rd-party libraries
  are Qt5, libSDL, freetype, Python, ncurses, Mesa, and libav.

:'dde_linux':

  This source-code repository contains the device driver environment for
  executing Linux device drivers natively on Genode. Currently, this
  repository hosts the USB stack.

:'dde_ipxe':

  This source-code repository contains the device-driver environment for
  executing drivers of the iPXE project.

:'dde_oss':

  This source-code repository contains the device-driver environment for the
  audio drivers of the Open Sound System (OSS).

:'dde_rump':

  This source-code repository contains the port of rump kernels, which are
  used to execute subsystems of the NetBSD kernel as user level processes.
  The repository contains a server that uses a rump kernel to provide
  various NetBSD file systems to Genode.

:'qt4':

  This source-code repository contains the Genode version of Qt4 framework.
  Please find more information about using Qt4 with Genode in the repository's
  'README' file. Please note that the Qt4 support is deprecated. Use Qt5
  as contained in 'libports' instead.

:'ports':

  This source-code repository hosts ports of 3rd-party applications to
  Genode. The repository does not contain upstream source code but provides
  a mechanism for downloading the official source distributions and adapt
  them to the Genode environment. The used mechanism is roughly the same
  as used for the 'libports' repository. Please consult 'libports/README'
  for further information.

:'ports-<platform>':

  These platform-specific source-code repositories contain software that
  capitalizes special features of the respective kernel platform.
  For the Fiasco.OC platform, 'ports-foc' hosts a port of the L4Linux
  kernel. For further information, please refer to the README file at the
  top level of the respective repository.

:'gems':

  This source-code repository contains Genode applications that use
  both native Genode interfaces as well as features of other high-level
  repositories, in particular shared libraries provided by 'libports'.