Scheduler debugfs
=================
-Booting a kernel with CONFIG_SCHED_DEBUG=y will give access to
+Booting a kernel with debugfs enabled will give access to
scheduler specific debug files under /sys/kernel/debug/sched. Some of
those files are described below.
CFS uses nanosecond granularity accounting and does not rely on any jiffies or
other HZ detail. Thus the CFS scheduler has no notion of "timeslices" in the
way the previous scheduler had, and has no heuristics whatsoever. There is
-only one central tunable (you have to switch on CONFIG_SCHED_DEBUG):
+only one central tunable:
/sys/kernel/debug/sched/base_slice_ns
for a given topology level by creating a sched_domain_topology_level array and
calling set_sched_topology() with this array as the parameter.
-The sched-domains debugging infrastructure can be enabled by enabling
-CONFIG_SCHED_DEBUG and adding 'sched_verbose' to your cmdline. If you
-forgot to tweak your cmdline, you can also flip the
+The sched-domains debugging infrastructure can be enabled by 'sched_verbose'
+to your cmdline. If you forgot to tweak your cmdline, you can also flip the
/sys/kernel/debug/sched/verbose knob. This enables an error checking parse of
the sched domains which should catch most possible errors (described above). It
also prints out the domain structure in a visual format.
nr_rejected : 0
enable_seq : 1
-If ``CONFIG_SCHED_DEBUG`` is set, whether a given task is on sched_ext can
-be determined as follows:
+Whether a given task is on sched_ext can be determined as follows:
.. code-block:: none
CONFIG_SMP is not defined, *no* domains are utilized and these lines
will not appear in the output. <name> is an extension to the domain field
that prints the name of the corresponding sched domain. It can appear in
-schedstat version 17 and above, and requires CONFIG_SCHED_DEBUG.)
+schedstat version 17 and above.
domain<N> <name> <cpumask> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
jiffy o detalles como HZ. De este modo, el gestor de tareas CFS no tiene
noción de "ventanas de tiempo" de la forma en que tenía el gestor de
tareas previo, y tampoco tiene heurísticos. Únicamente hay un parámetro
-central ajustable (se ha de cambiar en CONFIG_SCHED_DEBUG):
+central ajustable:
/sys/kernel/debug/sched/base_slice_ns