linux/kernel/sched
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
..
autogroup.c scheduler: Remove the now superfluous sentinel elements from ctl_table array 2024-04-24 09:43:54 +02:00
autogroup.h
build_policy.c sched_ext: Disallow loading BPF scheduler if isolcpus= domain isolation is in effect 2024-07-08 09:30:13 -10:00
build_utility.c sched/headers: Remove duplicate header inclusions 2023-10-03 21:27:55 +02:00
clock.c sched: Fix spelling in comments 2024-05-27 17:00:21 +02:00
completion.c sched: add a few helpers to wake up tasks on the current cpu 2023-07-17 16:08:08 -07:00
core_sched.c sched: Fix spelling in comments 2024-05-27 17:00:21 +02:00
core.c sched, sched_ext: Disable SM_IDLE/rq empty path when scx_enabled() 2024-09-23 05:40:53 -10:00
cpuacct.c Merge branch 'sched/fast-headers' into sched/core 2022-03-15 09:05:05 +01:00
cpudeadline.c sched/topology: Consolidate and clean up access to a CPU's max compute capacity 2023-10-09 12:59:48 +02:00
cpudeadline.h
cpufreq_schedutil.c Merge branch 'tip/sched/core' into sched_ext/for-6.12 2024-09-11 08:43:26 -10:00
cpufreq.c
cpupri.c sched/rt: Fix live lock between select_fallback_rq() and RT push 2023-09-28 22:58:13 +02:00
cpupri.h
cputime.c sched/cputime: Fix mul_u64_u64_div_u64() precision for cputime 2024-07-29 12:22:32 +02:00
deadline.c sched: Add put_prev_task(.next) 2024-09-03 15:26:32 +02:00
debug.c Merge branch 'tip/sched/core' into sched_ext/for-6.12 2024-09-11 08:43:26 -10:00
ext.c sched_ext: Provide a sysfs enable_seq counter 2024-09-23 06:53:02 -10:00
ext.h sched_ext: Add cgroup support 2024-09-04 10:24:59 -10:00
fair.c sched_ext: Initial pull request for v6.12 2024-09-21 09:44:57 -07:00
features.h sched/eevdf: Allow shorter slices to wakeup-preempt 2024-08-17 11:06:45 +02:00
idle.c Merge branch 'tip/sched/core' into for-6.12 2024-09-03 12:49:18 -10:00
isolation.c sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU 2024-04-28 10:08:21 +02:00
loadavg.c sched: Fix spelling in comments 2024-05-27 17:00:21 +02:00
Makefile
membarrier.c RISC-V Patches for the 6.9 Merge Window 2024-03-22 10:41:13 -07:00
pelt.c sched: Move update_other_load_avgs() to kernel/sched/pelt.c 2024-09-11 20:00:21 -10:00
pelt.h sched: Move update_other_load_avgs() to kernel/sched/pelt.c 2024-09-11 20:00:21 -10:00
psi.c Merge branch 'sched/urgent' into sched/core, to pick up fixes and refresh the branch 2024-07-11 10:42:33 +02:00
rt.c sched: Add put_prev_task(.next) 2024-09-03 15:26:32 +02:00
sched-pelt.h
sched.h sched: Put task_group::idle under CONFIG_GROUP_SCHED_WEIGHT 2024-09-23 05:24:12 -10:00
smp.h sched, smp: Trace smp callback causing an IPI 2023-03-24 11:01:29 +01:00
stats.c profiling: remove profile=sleep support 2024-08-04 13:36:28 -07:00
stats.h Merge branch 'sched/urgent' into sched/core, to pick up fixes and refresh the branch 2024-07-11 10:42:33 +02:00
stop_task.c sched: Add put_prev_task(.next) 2024-09-03 15:26:32 +02:00
swait.c sched: add a few helpers to wake up tasks on the current cpu 2023-07-17 16:08:08 -07:00
syscalls.c sched_ext: Initial pull request for v6.12 2024-09-21 09:44:57 -07:00
topology.c sched/fair: Fair server interface 2024-07-29 12:22:36 +02:00
wait_bit.c sched: Fix spelling in comments 2024-05-27 17:00:21 +02:00
wait.c sched: remove wait bookmarks 2023-10-18 14:34:18 -07:00