Florian Schmaus
016e9d8d08
The kernel's sched_setattr interface allows for more control over a processes scheduling attributes as the previously used sched_setscheduler interface. Using sched_setattr is also the prerequisite for support of utilization clamping (UCLAMP [1], see #26705) and allows to set sched_runtime. The latter, sched_runtime, will probably become a relevant scheduling parameter of the EEVDF scheduler [2, 3], and therefore will not only apply to processes scheduled via SCHED_DEADLINE, but also for processes scheduled via SCHED_OTHER/SCHED_BATCH (i.e., most processes). 1: https://docs.kernel.org/next/scheduler/sched-util-clamp.html 2: https://lwn.net/Articles/969062/ 3: https://lwn.net/ml/linux-kernel/20240405110010.934104715@infradead.org/
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
#pragma once
|
|
|
|
#include <linux/types.h>
|
|
#include <sched.h>
|
|
|
|
#include "macro.h"
|
|
|
|
#ifndef CLONE_NEWCGROUP
|
|
# define CLONE_NEWCGROUP 0x02000000
|
|
#else
|
|
assert_cc(CLONE_NEWCGROUP == 0x02000000);
|
|
#endif
|
|
|
|
/* 769071ac9f20b6a447410c7eaa55d1a5233ef40c (5.8) */
|
|
#ifndef CLONE_NEWTIME
|
|
# define CLONE_NEWTIME 0x00000080
|
|
#else
|
|
assert_cc(CLONE_NEWTIME == 0x00000080);
|
|
#endif
|
|
|
|
/* Not exposed yet. Defined at include/linux/sched.h */
|
|
#ifndef PF_KTHREAD
|
|
# define PF_KTHREAD 0x00200000
|
|
#else
|
|
assert_cc(PF_KTHREAD == 0x00200000);
|
|
#endif
|
|
|
|
/* The maximum thread/process name length including trailing NUL byte. This mimics the kernel definition of
|
|
* the same name, which we need in userspace at various places but is not defined in userspace currently,
|
|
* neither under this name nor any other.
|
|
*
|
|
* Not exposed yet. Defined at include/linux/sched.h */
|
|
#ifndef TASK_COMM_LEN
|
|
# define TASK_COMM_LEN 16
|
|
#else
|
|
assert_cc(TASK_COMM_LEN == 16);
|
|
#endif
|
|
|
|
#if !HAVE_STRUCT_SCHED_ATTR
|
|
struct sched_attr {
|
|
__u32 size; /* Size of this structure */
|
|
__u32 sched_policy; /* Policy (SCHED_*) */
|
|
__u64 sched_flags; /* Flags */
|
|
__s32 sched_nice; /* Nice value (SCHED_OTHER,
|
|
SCHED_BATCH) */
|
|
__u32 sched_priority; /* Static priority (SCHED_FIFO,
|
|
SCHED_RR) */
|
|
/* Remaining fields are for SCHED_DEADLINE
|
|
and potentially soon for SCHED_OTHER/SCHED_BATCH */
|
|
__u64 sched_runtime;
|
|
__u64 sched_deadline;
|
|
__u64 sched_period;
|
|
};
|
|
#endif
|