kernel.git/kernel/sched/build_policy.c, branch linux-6.0.y

sched: Fix missing prototype warnings

2022-05-01T08:03:43Z

A W=1 build emits more than a dozen missing prototype warnings related to scheduler and scheduler specific includes. Reported-by: kernel test robot Signed-off-by: Thomas Gleixner Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20220413133024.249118058@linutronix.de

sched/headers: Reorganize, clean up and optimize kernel/sched/sched.h dependencies

2022-02-23T09:58:34Z

Remove all headers, except the ones required to make this header build standalone. Also include stats.h in sched.h explicitly - dependencies already require this. Summary of the build speedup gained through the last ~15 scheduler build & header dependency patches: Cumulative scheduler (kernel/sched/) build time speedup on a Linux distribution's config, which enables all scheduler features, compared to the vanilla kernel: _____________________________________________________________________________ | | Vanilla kernel (v5.13-rc7): |_____________________________________________________________________________ | | Performance counter stats for 'make -j96 kernel/sched/' (3 runs): | | 126,975,564,374 instructions # 1.45 insn per cycle ( +- 0.00% ) | 87,637,847,671 cycles # 3.959 GHz ( +- 0.30% ) | 22,136.96 msec cpu-clock # 7.499 CPUs utilized ( +- 0.29% ) | | 2.9520 +- 0.0169 seconds time elapsed ( +- 0.57% ) |_____________________________________________________________________________ | | Patched kernel: |_____________________________________________________________________________ | | Performance counter stats for 'make -j96 kernel/sched/' (3 runs): | | 50,420,496,914 instructions # 1.47 insn per cycle ( +- 0.00% ) | 34,234,322,038 cycles # 3.946 GHz ( +- 0.31% ) | 8,675.81 msec cpu-clock # 3.053 CPUs utilized ( +- 0.45% ) | | 2.8420 +- 0.0181 seconds time elapsed ( +- 0.64% ) |_____________________________________________________________________________ Summary: - CPU time used to build the scheduler dropped by -60.9%, a reduction from 22.1 clock-seconds to 8.7 clock-seconds. - Wall-clock time to build the scheduler dropped by -3.9%, a reduction from 2.95 seconds to 2.84 seconds. Signed-off-by: Ingo Molnar Reviewed-by: Peter Zijlstra

sched/headers: Reorganize, clean up and optimize kernel/sched/build_policy.c dependencies

2022-02-23T09:58:33Z

Use all generic headers from kernel/sched/sched.h that are required for it to build. Sort the sections alphabetically. Signed-off-by: Ingo Molnar Reviewed-by: Peter Zijlstra

sched/headers: Standardize kernel/sched/sched.h header dependencies

2022-02-23T09:58:33Z

kernel/sched/sched.h is a weird mix of ad-hoc headers included in the middle of the header. Two of them rely on being included in the middle of kernel/sched/sched.h, due to definitions they require: - "stat.h" needs the rq definitions. - "autogroup.h" needs the task_group definition. Move the inclusion of these two files out of kernel/sched/sched.h, and include them in all files that require them. Move of the rest of the header dependencies to the top of the kernel/sched/sched.h file. Signed-off-by: Ingo Molnar Reviewed-by: Peter Zijlstra

sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there

2022-02-23T09:58:33Z

Similarly to kernel/sched/build_utility.c, collect all 'scheduling policy' related source code files into kernel/sched/build_policy.c: kernel/sched/idle.c kernel/sched/rt.c kernel/sched/cpudeadline.c kernel/sched/pelt.c kernel/sched/cputime.c kernel/sched/deadline.c With the exception of fair.c, which we continue to build as a separate file for build efficiency and parallelism reasons. Signed-off-by: Ingo Molnar Reviewed-by: Peter Zijlstra