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4ff8f2ca6c
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:
_____________________________________________________________________________
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| Vanilla kernel (v5.13-rc7):
|_____________________________________________________________________________
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| Performance counter stats for 'make -j96 kernel/sched/' (3 runs):
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| 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% )
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| 2.9520 +- 0.0169 seconds time elapsed ( +- 0.57% )
|_____________________________________________________________________________
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| Patched kernel:
|_____________________________________________________________________________
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| Performance counter stats for 'make -j96 kernel/sched/' (3 runs):
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| 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% )
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| 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 <mingo@kernel.org>
Reviewed-by: Peter Zijlstra <peterz@infradead.org>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* These are the scheduling policy related scheduler files, built
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* in a single compilation unit for build efficiency reasons.
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*
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* ( Incidentally, the size of the compilation unit is roughly
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* comparable to core.c and fair.c, the other two big
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* compilation units. This helps balance build time, while
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* coalescing source files to amortize header inclusion
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* cost. )
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*
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* core.c and fair.c are built separately.
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*/
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/* Headers: */
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#include <linux/sched/clock.h>
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#include <linux/sched/cputime.h>
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#include <linux/sched/posix-timers.h>
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#include <linux/sched/rt.h>
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#include <linux/cpuidle.h>
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#include <linux/jiffies.h>
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#include <linux/livepatch.h>
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#include <linux/psi.h>
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#include <linux/seqlock_api.h>
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#include <linux/slab.h>
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#include <linux/suspend.h>
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#include <linux/tsacct_kern.h>
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#include <linux/vtime.h>
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#include <uapi/linux/sched/types.h>
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#include "sched.h"
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#include "autogroup.h"
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#include "stats.h"
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#include "pelt.h"
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/* Source code modules: */
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#include "idle.c"
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#include "rt.c"
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#ifdef CONFIG_SMP
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# include "cpudeadline.c"
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# include "pelt.c"
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#endif
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#include "cputime.c"
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#include "deadline.c"
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