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History

Andrea Righi 431844b65f sched_ext: Provide a sysfs enable_seq counter

As discussed during the distro-centric session within the sched_ext
Microconference at LPC 2024, introduce a sequence counter that is
incremented every time a BPF scheduler is loaded.

This feature can help distributions in diagnosing potential performance
regressions by identifying systems where users are running (or have ran)
custom BPF schedulers.

Example:

 arighi@virtme-ng~> cat /sys/kernel/sched_ext/enable_seq
 0
 arighi@virtme-ng~> sudo scx_simple
 local=1 global=0
 ^CEXIT: unregistered from user space
 arighi@virtme-ng~> cat /sys/kernel/sched_ext/enable_seq
 1

In this way user-space tools (such as Ubuntu's apport and similar) are
able to gather and include this information in bug reports.

Cc: Giovanni Gherdovich <giovanni.gherdovich@suse.com>
Cc: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Cc: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Cc: Phil Auld <pauld@redhat.com>
Signed-off-by: Andrea Righi <andrea.righi@linux.dev>
Signed-off-by: Tejun Heo <tj@kernel.org>

2024-09-23 06:53:02 -10:00

completion.rst

docs: scheduler: completion: Update member of struct completion

2024-09-05 14:17:45 -06:00

index.rst

sched_ext: Initial pull request for v6.12

2024-09-21 09:44:57 -07:00

membarrier.rst

membarrier: Create Documentation/scheduler/membarrier.rst

2024-02-15 08:04:12 -08:00

sched-arch.rst

Documentation: Drop or replace remaining mentions of IA64