sched_ext: Changes for v6.17
- Add support for cgroup "cpu.max" interface. - Code organization cleanup so that ext_idle.c doesn't depend on the source-file-inclusion build method of sched/. - Drop UP paths in accordance with sched core changes. - Documentation and other misc changes. -----BEGIN PGP SIGNATURE----- iIQEABYKACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCaIqnxg4cdGpAa2VybmVs Lm9yZwAKCRCxYfJx3gVYGUh5AQC6YM7ggRPYRmy28m5B0nubpKtCHqPOAHSd/QbY MCiThgD+JuE9ewg3wYO/jvJx3NyIRB1McMnAaG59hf6R0Plh5Qo= =TeLF -----END PGP SIGNATURE----- Merge tag 'sched_ext-for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext Pull sched_ext updates from Tejun Heo: - Add support for cgroup "cpu.max" interface - Code organization cleanup so that ext_idle.c doesn't depend on the source-file-inclusion build method of sched/ - Drop UP paths in accordance with sched core changes - Documentation and other misc changes * tag 'sched_ext-for-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: sched_ext: Fix scx_bpf_reenqueue_local() reference sched_ext: Drop kfuncs marked for removal in 6.15 sched_ext, rcu: Eject BPF scheduler on RCU CPU stall panic kernel/sched/ext.c: fix typo "occured" -> "occurred" in comments sched_ext: Add support for cgroup bandwidth control interface sched_ext, sched/core: Factor out struct scx_task_group sched_ext: Return NULL in llc_span sched_ext: Always use SMP versions in kernel/sched/ext_idle.h sched_ext: Always use SMP versions in kernel/sched/ext_idle.c sched_ext: Always use SMP versions in kernel/sched/ext.h sched_ext: Always use SMP versions in kernel/sched/ext.c sched_ext: Documentation: Clarify time slice handling in task lifecycle sched_ext: Make scx_locked_rq() inline sched_ext: Make scx_rq_bypassing() inline sched_ext: idle: Make local functions static in ext_idle.c sched_ext: idle: Remove unnecessary ifdef in scx_bpf_cpu_node()
This commit is contained in:
commit
6a68cec16b
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@ -313,16 +313,21 @@ by a sched_ext scheduler:
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ops.runnable(); /* Task becomes ready to run */
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while (task is runnable) {
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if (task is not in a DSQ) {
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if (task is not in a DSQ && task->scx.slice == 0) {
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ops.enqueue(); /* Task can be added to a DSQ */
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/* A CPU becomes available */
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/* Any usable CPU becomes available */
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ops.dispatch(); /* Task is moved to a local DSQ */
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}
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ops.running(); /* Task starts running on its assigned CPU */
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ops.tick(); /* Called every 1/HZ seconds */
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while (task->scx.slice > 0 && task is runnable)
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ops.tick(); /* Called every 1/HZ seconds */
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ops.stopping(); /* Task stops running (time slice expires or wait) */
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/* Task's CPU becomes available */
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ops.dispatch(); /* task->scx.slice can be refilled */
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}
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ops.quiescent(); /* Task releases its assigned CPU (wait) */
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@ -164,7 +164,7 @@ struct sched_ext_entity {
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/*
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* Runtime budget in nsecs. This is usually set through
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* scx_bpf_dispatch() but can also be modified directly by the BPF
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* scx_bpf_dsq_insert() but can also be modified directly by the BPF
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* scheduler. Automatically decreased by SCX as the task executes. On
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* depletion, a scheduling event is triggered.
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*
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@ -176,10 +176,10 @@ struct sched_ext_entity {
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/*
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* Used to order tasks when dispatching to the vtime-ordered priority
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* queue of a dsq. This is usually set through scx_bpf_dispatch_vtime()
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* but can also be modified directly by the BPF scheduler. Modifying it
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* while a task is queued on a dsq may mangle the ordering and is not
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* recommended.
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* queue of a dsq. This is usually set through
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* scx_bpf_dsq_insert_vtime() but can also be modified directly by the
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* BPF scheduler. Modifying it while a task is queued on a dsq may
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* mangle the ordering and is not recommended.
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*/
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u64 dsq_vtime;
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@ -206,12 +206,25 @@ struct sched_ext_entity {
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void sched_ext_free(struct task_struct *p);
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void print_scx_info(const char *log_lvl, struct task_struct *p);
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void scx_softlockup(u32 dur_s);
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bool scx_rcu_cpu_stall(void);
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#else /* !CONFIG_SCHED_CLASS_EXT */
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static inline void sched_ext_free(struct task_struct *p) {}
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static inline void print_scx_info(const char *log_lvl, struct task_struct *p) {}
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static inline void scx_softlockup(u32 dur_s) {}
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static inline bool scx_rcu_cpu_stall(void) { return false; }
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#endif /* CONFIG_SCHED_CLASS_EXT */
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struct scx_task_group {
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#ifdef CONFIG_EXT_GROUP_SCHED
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u32 flags; /* SCX_TG_* */
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u32 weight;
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u64 bw_period_us;
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u64 bw_quota_us;
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u64 bw_burst_us;
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#endif
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};
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#endif /* _LINUX_SCHED_EXT_H */
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@ -1081,6 +1081,9 @@ if CGROUP_SCHED
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config GROUP_SCHED_WEIGHT
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def_bool n
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config GROUP_SCHED_BANDWIDTH
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def_bool n
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config FAIR_GROUP_SCHED
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bool "Group scheduling for SCHED_OTHER"
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depends on CGROUP_SCHED
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@ -1090,6 +1093,7 @@ config FAIR_GROUP_SCHED
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config CFS_BANDWIDTH
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bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
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depends on FAIR_GROUP_SCHED
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select GROUP_SCHED_BANDWIDTH
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default n
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help
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This option allows users to define CPU bandwidth rates (limits) for
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@ -1124,6 +1128,7 @@ config EXT_GROUP_SCHED
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bool
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depends on SCHED_CLASS_EXT && CGROUP_SCHED
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select GROUP_SCHED_WEIGHT
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select GROUP_SCHED_BANDWIDTH
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default y
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endif #CGROUP_SCHED
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@ -163,6 +163,13 @@ static void panic_on_rcu_stall(void)
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{
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static int cpu_stall;
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/*
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* Attempt to kick out the BPF scheduler if it's installed and defer
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* the panic to give the system a chance to recover.
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*/
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if (scx_rcu_cpu_stall())
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return;
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if (++cpu_stall < sysctl_max_rcu_stall_to_panic)
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return;
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@ -9815,7 +9815,9 @@ static int cpu_cfs_local_stat_show(struct seq_file *sf, void *v)
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return 0;
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}
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#endif /* CONFIG_CFS_BANDWIDTH */
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#ifdef CONFIG_GROUP_SCHED_BANDWIDTH
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const u64 max_bw_quota_period_us = 1 * USEC_PER_SEC; /* 1s */
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static const u64 min_bw_quota_period_us = 1 * USEC_PER_MSEC; /* 1ms */
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/* More than 203 days if BW_SHIFT equals 20. */
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@ -9824,12 +9826,21 @@ static const u64 max_bw_runtime_us = MAX_BW;
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static void tg_bandwidth(struct task_group *tg,
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u64 *period_us_p, u64 *quota_us_p, u64 *burst_us_p)
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{
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#ifdef CONFIG_CFS_BANDWIDTH
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if (period_us_p)
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*period_us_p = tg_get_cfs_period(tg);
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if (quota_us_p)
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*quota_us_p = tg_get_cfs_quota(tg);
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if (burst_us_p)
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*burst_us_p = tg_get_cfs_burst(tg);
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#else /* !CONFIG_CFS_BANDWIDTH */
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if (period_us_p)
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*period_us_p = tg->scx.bw_period_us;
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if (quota_us_p)
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*quota_us_p = tg->scx.bw_quota_us;
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if (burst_us_p)
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*burst_us_p = tg->scx.bw_burst_us;
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#endif /* CONFIG_CFS_BANDWIDTH */
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}
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static u64 cpu_period_read_u64(struct cgroup_subsys_state *css,
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@ -9845,6 +9856,7 @@ static int tg_set_bandwidth(struct task_group *tg,
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u64 period_us, u64 quota_us, u64 burst_us)
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{
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const u64 max_usec = U64_MAX / NSEC_PER_USEC;
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int ret = 0;
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if (tg == &root_task_group)
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return -EINVAL;
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@ -9882,7 +9894,12 @@ static int tg_set_bandwidth(struct task_group *tg,
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burst_us + quota_us > max_bw_runtime_us))
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return -EINVAL;
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return tg_set_cfs_bandwidth(tg, period_us, quota_us, burst_us);
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#ifdef CONFIG_CFS_BANDWIDTH
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ret = tg_set_cfs_bandwidth(tg, period_us, quota_us, burst_us);
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#endif /* CONFIG_CFS_BANDWIDTH */
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if (!ret)
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scx_group_set_bandwidth(tg, period_us, quota_us, burst_us);
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return ret;
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}
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static s64 cpu_quota_read_s64(struct cgroup_subsys_state *css,
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@ -9935,7 +9952,7 @@ static int cpu_burst_write_u64(struct cgroup_subsys_state *css,
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tg_bandwidth(tg, &period_us, "a_us, NULL);
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return tg_set_bandwidth(tg, period_us, quota_us, burst_us);
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}
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#endif /* CONFIG_CFS_BANDWIDTH */
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#endif /* CONFIG_GROUP_SCHED_BANDWIDTH */
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#ifdef CONFIG_RT_GROUP_SCHED
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static int cpu_rt_runtime_write(struct cgroup_subsys_state *css,
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@ -9995,7 +10012,7 @@ static struct cftype cpu_legacy_files[] = {
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.write_s64 = cpu_idle_write_s64,
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},
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#endif
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#ifdef CONFIG_CFS_BANDWIDTH
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#ifdef CONFIG_GROUP_SCHED_BANDWIDTH
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{
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.name = "cfs_period_us",
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.read_u64 = cpu_period_read_u64,
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@ -10011,6 +10028,8 @@ static struct cftype cpu_legacy_files[] = {
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.read_u64 = cpu_burst_read_u64,
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.write_u64 = cpu_burst_write_u64,
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},
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#endif
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#ifdef CONFIG_CFS_BANDWIDTH
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{
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.name = "stat",
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.seq_show = cpu_cfs_stat_show,
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@ -10224,7 +10243,7 @@ static int __maybe_unused cpu_period_quota_parse(char *buf, u64 *period_us_p,
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return 0;
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}
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#ifdef CONFIG_CFS_BANDWIDTH
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#ifdef CONFIG_GROUP_SCHED_BANDWIDTH
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static int cpu_max_show(struct seq_file *sf, void *v)
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{
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struct task_group *tg = css_tg(seq_css(sf));
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@ -10271,7 +10290,7 @@ static struct cftype cpu_files[] = {
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.write_s64 = cpu_idle_write_s64,
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},
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#endif
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#ifdef CONFIG_CFS_BANDWIDTH
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#ifdef CONFIG_GROUP_SCHED_BANDWIDTH
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{
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.name = "max",
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.flags = CFTYPE_NOT_ON_ROOT,
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@ -203,6 +203,11 @@ struct scx_exit_task_args {
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struct scx_cgroup_init_args {
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/* the weight of the cgroup [1..10000] */
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u32 weight;
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/* bandwidth control parameters from cpu.max and cpu.max.burst */
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u64 bw_period_us;
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u64 bw_quota_us;
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u64 bw_burst_us;
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};
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enum scx_cpu_preempt_reason {
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@ -664,9 +669,31 @@ struct sched_ext_ops {
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* @cgrp: cgroup whose weight is being updated
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* @weight: new weight [1..10000]
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*
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* Update @tg's weight to @weight.
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* Update @cgrp's weight to @weight.
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*/
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void (*cgroup_set_weight)(struct cgroup *cgrp, u32 weight);
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/**
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* @cgroup_set_bandwidth: A cgroup's bandwidth is being changed
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* @cgrp: cgroup whose bandwidth is being updated
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* @period_us: bandwidth control period
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* @quota_us: bandwidth control quota
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* @burst_us: bandwidth control burst
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*
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* Update @cgrp's bandwidth control parameters. This is from the cpu.max
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* cgroup interface.
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*
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* @quota_us / @period_us determines the CPU bandwidth @cgrp is entitled
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* to. For example, if @period_us is 1_000_000 and @quota_us is
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* 2_500_000. @cgrp is entitled to 2.5 CPUs. @burst_us can be
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* interpreted in the same fashion and specifies how much @cgrp can
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* burst temporarily. The specific control mechanism and thus the
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* interpretation of @period_us and burstiness is upto to the BPF
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* scheduler.
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*/
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void (*cgroup_set_bandwidth)(struct cgroup *cgrp,
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u64 period_us, u64 quota_us, u64 burst_us);
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#endif /* CONFIG_EXT_GROUP_SCHED */
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/*
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@ -884,7 +911,7 @@ enum scx_enq_flags {
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/*
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* The task being enqueued was previously enqueued on the current CPU's
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* %SCX_DSQ_LOCAL, but was removed from it in a call to the
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* bpf_scx_reenqueue_local() kfunc. If bpf_scx_reenqueue_local() was
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* scx_bpf_reenqueue_local() kfunc. If scx_bpf_reenqueue_local() was
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* invoked in a ->cpu_release() callback, and the task is again
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* dispatched back to %SCX_LOCAL_DSQ by this current ->enqueue(), the
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* task will not be scheduled on the CPU until at least the next invocation
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@ -1247,7 +1274,7 @@ static void scx_kf_disallow(u32 mask)
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* This allows kfuncs to safely operate on rq from any scx ops callback,
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* knowing which rq is already locked.
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*/
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static DEFINE_PER_CPU(struct rq *, locked_rq);
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DEFINE_PER_CPU(struct rq *, scx_locked_rq_state);
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static inline void update_locked_rq(struct rq *rq)
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{
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@ -1258,16 +1285,7 @@ static inline void update_locked_rq(struct rq *rq)
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*/
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if (rq)
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lockdep_assert_rq_held(rq);
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__this_cpu_write(locked_rq, rq);
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}
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/*
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* Return the rq currently locked from an scx callback, or NULL if no rq is
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* locked.
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*/
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static inline struct rq *scx_locked_rq(void)
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{
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return __this_cpu_read(locked_rq);
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__this_cpu_write(scx_locked_rq_state, rq);
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}
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#define SCX_CALL_OP(sch, mask, op, rq, args...) \
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|
@ -1641,7 +1659,7 @@ static struct task_struct *scx_task_iter_next_locked(struct scx_task_iter *iter)
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* scx_add_event - Increase an event counter for 'name' by 'cnt'
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* @sch: scx_sched to account events for
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* @name: an event name defined in struct scx_event_stats
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* @cnt: the number of the event occured
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* @cnt: the number of the event occurred
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*
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* This can be used when preemption is not disabled.
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*/
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|
@ -1654,7 +1672,7 @@ static struct task_struct *scx_task_iter_next_locked(struct scx_task_iter *iter)
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* __scx_add_event - Increase an event counter for 'name' by 'cnt'
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* @sch: scx_sched to account events for
|
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* @name: an event name defined in struct scx_event_stats
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* @cnt: the number of the event occured
|
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* @cnt: the number of the event occurred
|
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*
|
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* This should be used only when preemption is disabled.
|
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*/
|
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|
@ -1705,11 +1723,6 @@ static bool scx_tryset_enable_state(enum scx_enable_state to,
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return atomic_try_cmpxchg(&scx_enable_state_var, &from_v, to);
|
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}
|
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static bool scx_rq_bypassing(struct rq *rq)
|
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{
|
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return unlikely(rq->scx.flags & SCX_RQ_BYPASSING);
|
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}
|
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|
||||
/**
|
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* wait_ops_state - Busy-wait the specified ops state to end
|
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* @p: target task
|
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|
@ -1796,12 +1809,10 @@ static void run_deferred(struct rq *rq)
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process_ddsp_deferred_locals(rq);
|
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}
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|
||||
#ifdef CONFIG_SMP
|
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static void deferred_bal_cb_workfn(struct rq *rq)
|
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{
|
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run_deferred(rq);
|
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}
|
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#endif
|
||||
|
||||
static void deferred_irq_workfn(struct irq_work *irq_work)
|
||||
{
|
||||
|
@ -1824,7 +1835,6 @@ static void schedule_deferred(struct rq *rq)
|
|||
{
|
||||
lockdep_assert_rq_held(rq);
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/*
|
||||
* If in the middle of waking up a task, task_woken_scx() will be called
|
||||
* afterwards which will then run the deferred actions, no need to
|
||||
|
@ -1842,7 +1852,7 @@ static void schedule_deferred(struct rq *rq)
|
|||
deferred_bal_cb_workfn);
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* No scheduler hooks available. Queue an irq work. They are executed on
|
||||
* IRQ re-enable which may take a bit longer than the scheduler hooks.
|
||||
|
@ -2546,7 +2556,6 @@ static void move_local_task_to_local_dsq(struct task_struct *p, u64 enq_flags,
|
|||
p->scx.dsq = dst_dsq;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/**
|
||||
* move_remote_task_to_local_dsq - Move a task from a foreign rq to a local DSQ
|
||||
* @p: task to move
|
||||
|
@ -2713,11 +2722,6 @@ static bool consume_remote_task(struct rq *this_rq, struct task_struct *p,
|
|||
return false;
|
||||
}
|
||||
}
|
||||
#else /* CONFIG_SMP */
|
||||
static inline void move_remote_task_to_local_dsq(struct task_struct *p, u64 enq_flags, struct rq *src_rq, struct rq *dst_rq) { WARN_ON_ONCE(1); }
|
||||
static inline bool task_can_run_on_remote_rq(struct scx_sched *sch, struct task_struct *p, struct rq *rq, bool enforce) { return false; }
|
||||
static inline bool consume_remote_task(struct rq *this_rq, struct task_struct *p, struct scx_dispatch_q *dsq, struct rq *task_rq) { return false; }
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
/**
|
||||
* move_task_between_dsqs() - Move a task from one DSQ to another
|
||||
|
@ -2890,9 +2894,7 @@ static void dispatch_to_local_dsq(struct scx_sched *sch, struct rq *rq,
|
|||
{
|
||||
struct rq *src_rq = task_rq(p);
|
||||
struct rq *dst_rq = container_of(dst_dsq, struct rq, scx.local_dsq);
|
||||
#ifdef CONFIG_SMP
|
||||
struct rq *locked_rq = rq;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* We're synchronized against dequeue through DISPATCHING. As @p can't
|
||||
|
@ -2906,7 +2908,6 @@ static void dispatch_to_local_dsq(struct scx_sched *sch, struct rq *rq,
|
|||
return;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
if (src_rq != dst_rq &&
|
||||
unlikely(!task_can_run_on_remote_rq(sch, p, dst_rq, true))) {
|
||||
dispatch_enqueue(sch, find_global_dsq(p), p,
|
||||
|
@ -2966,9 +2967,6 @@ static void dispatch_to_local_dsq(struct scx_sched *sch, struct rq *rq,
|
|||
raw_spin_rq_unlock(locked_rq);
|
||||
raw_spin_rq_lock(rq);
|
||||
}
|
||||
#else /* CONFIG_SMP */
|
||||
BUG(); /* control can not reach here on UP */
|
||||
#endif /* CONFIG_SMP */
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -3292,10 +3290,8 @@ static void set_next_task_scx(struct rq *rq, struct task_struct *p, bool first)
|
|||
static enum scx_cpu_preempt_reason
|
||||
preempt_reason_from_class(const struct sched_class *class)
|
||||
{
|
||||
#ifdef CONFIG_SMP
|
||||
if (class == &stop_sched_class)
|
||||
return SCX_CPU_PREEMPT_STOP;
|
||||
#endif
|
||||
if (class == &dl_sched_class)
|
||||
return SCX_CPU_PREEMPT_DL;
|
||||
if (class == &rt_sched_class)
|
||||
|
@ -3308,14 +3304,12 @@ static void switch_class(struct rq *rq, struct task_struct *next)
|
|||
struct scx_sched *sch = scx_root;
|
||||
const struct sched_class *next_class = next->sched_class;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/*
|
||||
* Pairs with the smp_load_acquire() issued by a CPU in
|
||||
* kick_cpus_irq_workfn() who is waiting for this CPU to perform a
|
||||
* resched.
|
||||
*/
|
||||
smp_store_release(&rq->scx.pnt_seq, rq->scx.pnt_seq + 1);
|
||||
#endif
|
||||
if (!(sch->ops.flags & SCX_OPS_HAS_CPU_PREEMPT))
|
||||
return;
|
||||
|
||||
|
@ -3512,8 +3506,6 @@ bool scx_prio_less(const struct task_struct *a, const struct task_struct *b,
|
|||
}
|
||||
#endif /* CONFIG_SCHED_CORE */
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
|
||||
static int select_task_rq_scx(struct task_struct *p, int prev_cpu, int wake_flags)
|
||||
{
|
||||
struct scx_sched *sch = scx_root;
|
||||
|
@ -3643,7 +3635,6 @@ static void rq_offline_scx(struct rq *rq)
|
|||
rq->scx.flags &= ~SCX_RQ_ONLINE;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
static bool check_rq_for_timeouts(struct rq *rq)
|
||||
{
|
||||
|
@ -4098,7 +4089,9 @@ static bool scx_cgroup_enabled;
|
|||
|
||||
void scx_tg_init(struct task_group *tg)
|
||||
{
|
||||
tg->scx_weight = CGROUP_WEIGHT_DFL;
|
||||
tg->scx.weight = CGROUP_WEIGHT_DFL;
|
||||
tg->scx.bw_period_us = default_bw_period_us();
|
||||
tg->scx.bw_quota_us = RUNTIME_INF;
|
||||
}
|
||||
|
||||
int scx_tg_online(struct task_group *tg)
|
||||
|
@ -4106,14 +4099,17 @@ int scx_tg_online(struct task_group *tg)
|
|||
struct scx_sched *sch = scx_root;
|
||||
int ret = 0;
|
||||
|
||||
WARN_ON_ONCE(tg->scx_flags & (SCX_TG_ONLINE | SCX_TG_INITED));
|
||||
WARN_ON_ONCE(tg->scx.flags & (SCX_TG_ONLINE | SCX_TG_INITED));
|
||||
|
||||
percpu_down_read(&scx_cgroup_rwsem);
|
||||
|
||||
if (scx_cgroup_enabled) {
|
||||
if (SCX_HAS_OP(sch, cgroup_init)) {
|
||||
struct scx_cgroup_init_args args =
|
||||
{ .weight = tg->scx_weight };
|
||||
{ .weight = tg->scx.weight,
|
||||
.bw_period_us = tg->scx.bw_period_us,
|
||||
.bw_quota_us = tg->scx.bw_quota_us,
|
||||
.bw_burst_us = tg->scx.bw_burst_us };
|
||||
|
||||
ret = SCX_CALL_OP_RET(sch, SCX_KF_UNLOCKED, cgroup_init,
|
||||
NULL, tg->css.cgroup, &args);
|
||||
|
@ -4121,9 +4117,9 @@ int scx_tg_online(struct task_group *tg)
|
|||
ret = ops_sanitize_err(sch, "cgroup_init", ret);
|
||||
}
|
||||
if (ret == 0)
|
||||
tg->scx_flags |= SCX_TG_ONLINE | SCX_TG_INITED;
|
||||
tg->scx.flags |= SCX_TG_ONLINE | SCX_TG_INITED;
|
||||
} else {
|
||||
tg->scx_flags |= SCX_TG_ONLINE;
|
||||
tg->scx.flags |= SCX_TG_ONLINE;
|
||||
}
|
||||
|
||||
percpu_up_read(&scx_cgroup_rwsem);
|
||||
|
@ -4134,15 +4130,15 @@ void scx_tg_offline(struct task_group *tg)
|
|||
{
|
||||
struct scx_sched *sch = scx_root;
|
||||
|
||||
WARN_ON_ONCE(!(tg->scx_flags & SCX_TG_ONLINE));
|
||||
WARN_ON_ONCE(!(tg->scx.flags & SCX_TG_ONLINE));
|
||||
|
||||
percpu_down_read(&scx_cgroup_rwsem);
|
||||
|
||||
if (scx_cgroup_enabled && SCX_HAS_OP(sch, cgroup_exit) &&
|
||||
(tg->scx_flags & SCX_TG_INITED))
|
||||
(tg->scx.flags & SCX_TG_INITED))
|
||||
SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_exit, NULL,
|
||||
tg->css.cgroup);
|
||||
tg->scx_flags &= ~(SCX_TG_ONLINE | SCX_TG_INITED);
|
||||
tg->scx.flags &= ~(SCX_TG_ONLINE | SCX_TG_INITED);
|
||||
|
||||
percpu_up_read(&scx_cgroup_rwsem);
|
||||
}
|
||||
|
@ -4251,11 +4247,11 @@ void scx_group_set_weight(struct task_group *tg, unsigned long weight)
|
|||
percpu_down_read(&scx_cgroup_rwsem);
|
||||
|
||||
if (scx_cgroup_enabled && SCX_HAS_OP(sch, cgroup_set_weight) &&
|
||||
tg->scx_weight != weight)
|
||||
tg->scx.weight != weight)
|
||||
SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_set_weight, NULL,
|
||||
tg_cgrp(tg), weight);
|
||||
|
||||
tg->scx_weight = weight;
|
||||
tg->scx.weight = weight;
|
||||
|
||||
percpu_up_read(&scx_cgroup_rwsem);
|
||||
}
|
||||
|
@ -4265,6 +4261,27 @@ void scx_group_set_idle(struct task_group *tg, bool idle)
|
|||
/* TODO: Implement ops->cgroup_set_idle() */
|
||||
}
|
||||
|
||||
void scx_group_set_bandwidth(struct task_group *tg,
|
||||
u64 period_us, u64 quota_us, u64 burst_us)
|
||||
{
|
||||
struct scx_sched *sch = scx_root;
|
||||
|
||||
percpu_down_read(&scx_cgroup_rwsem);
|
||||
|
||||
if (scx_cgroup_enabled && SCX_HAS_OP(sch, cgroup_set_bandwidth) &&
|
||||
(tg->scx.bw_period_us != period_us ||
|
||||
tg->scx.bw_quota_us != quota_us ||
|
||||
tg->scx.bw_burst_us != burst_us))
|
||||
SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_set_bandwidth, NULL,
|
||||
tg_cgrp(tg), period_us, quota_us, burst_us);
|
||||
|
||||
tg->scx.bw_period_us = period_us;
|
||||
tg->scx.bw_quota_us = quota_us;
|
||||
tg->scx.bw_burst_us = burst_us;
|
||||
|
||||
percpu_up_read(&scx_cgroup_rwsem);
|
||||
}
|
||||
|
||||
static void scx_cgroup_lock(void)
|
||||
{
|
||||
percpu_down_write(&scx_cgroup_rwsem);
|
||||
|
@ -4308,14 +4325,12 @@ DEFINE_SCHED_CLASS(ext) = {
|
|||
.put_prev_task = put_prev_task_scx,
|
||||
.set_next_task = set_next_task_scx,
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
.select_task_rq = select_task_rq_scx,
|
||||
.task_woken = task_woken_scx,
|
||||
.set_cpus_allowed = set_cpus_allowed_scx,
|
||||
|
||||
.rq_online = rq_online_scx,
|
||||
.rq_offline = rq_offline_scx,
|
||||
#endif
|
||||
|
||||
.task_tick = task_tick_scx,
|
||||
|
||||
|
@ -4408,9 +4423,9 @@ static void scx_cgroup_exit(struct scx_sched *sch)
|
|||
css_for_each_descendant_post(css, &root_task_group.css) {
|
||||
struct task_group *tg = css_tg(css);
|
||||
|
||||
if (!(tg->scx_flags & SCX_TG_INITED))
|
||||
if (!(tg->scx.flags & SCX_TG_INITED))
|
||||
continue;
|
||||
tg->scx_flags &= ~SCX_TG_INITED;
|
||||
tg->scx.flags &= ~SCX_TG_INITED;
|
||||
|
||||
if (!sch->ops.cgroup_exit)
|
||||
continue;
|
||||
|
@ -4442,14 +4457,19 @@ static int scx_cgroup_init(struct scx_sched *sch)
|
|||
rcu_read_lock();
|
||||
css_for_each_descendant_pre(css, &root_task_group.css) {
|
||||
struct task_group *tg = css_tg(css);
|
||||
struct scx_cgroup_init_args args = { .weight = tg->scx_weight };
|
||||
struct scx_cgroup_init_args args = {
|
||||
.weight = tg->scx.weight,
|
||||
.bw_period_us = tg->scx.bw_period_us,
|
||||
.bw_quota_us = tg->scx.bw_quota_us,
|
||||
.bw_burst_us = tg->scx.bw_burst_us,
|
||||
};
|
||||
|
||||
if ((tg->scx_flags &
|
||||
if ((tg->scx.flags &
|
||||
(SCX_TG_ONLINE | SCX_TG_INITED)) != SCX_TG_ONLINE)
|
||||
continue;
|
||||
|
||||
if (!sch->ops.cgroup_init) {
|
||||
tg->scx_flags |= SCX_TG_INITED;
|
||||
tg->scx.flags |= SCX_TG_INITED;
|
||||
continue;
|
||||
}
|
||||
|
||||
|
@ -4464,7 +4484,7 @@ static int scx_cgroup_init(struct scx_sched *sch)
|
|||
scx_error(sch, "ops.cgroup_init() failed (%d)", ret);
|
||||
return ret;
|
||||
}
|
||||
tg->scx_flags |= SCX_TG_INITED;
|
||||
tg->scx.flags |= SCX_TG_INITED;
|
||||
|
||||
rcu_read_lock();
|
||||
css_put(css);
|
||||
|
@ -4656,6 +4676,41 @@ bool scx_allow_ttwu_queue(const struct task_struct *p)
|
|||
p->sched_class != &ext_sched_class;
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_rcu_cpu_stall - sched_ext RCU CPU stall handler
|
||||
*
|
||||
* While there are various reasons why RCU CPU stalls can occur on a system
|
||||
* that may not be caused by the current BPF scheduler, try kicking out the
|
||||
* current scheduler in an attempt to recover the system to a good state before
|
||||
* issuing panics.
|
||||
*/
|
||||
bool scx_rcu_cpu_stall(void)
|
||||
{
|
||||
struct scx_sched *sch;
|
||||
|
||||
rcu_read_lock();
|
||||
|
||||
sch = rcu_dereference(scx_root);
|
||||
if (unlikely(!sch)) {
|
||||
rcu_read_unlock();
|
||||
return false;
|
||||
}
|
||||
|
||||
switch (scx_enable_state()) {
|
||||
case SCX_ENABLING:
|
||||
case SCX_ENABLED:
|
||||
break;
|
||||
default:
|
||||
rcu_read_unlock();
|
||||
return false;
|
||||
}
|
||||
|
||||
scx_error(sch, "RCU CPU stall detected!");
|
||||
rcu_read_unlock();
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_softlockup - sched_ext softlockup handler
|
||||
* @dur_s: number of seconds of CPU stuck due to soft lockup
|
||||
|
@ -5944,6 +5999,7 @@ static s32 sched_ext_ops__cgroup_prep_move(struct task_struct *p, struct cgroup
|
|||
static void sched_ext_ops__cgroup_move(struct task_struct *p, struct cgroup *from, struct cgroup *to) {}
|
||||
static void sched_ext_ops__cgroup_cancel_move(struct task_struct *p, struct cgroup *from, struct cgroup *to) {}
|
||||
static void sched_ext_ops__cgroup_set_weight(struct cgroup *cgrp, u32 weight) {}
|
||||
static void sched_ext_ops__cgroup_set_bandwidth(struct cgroup *cgrp, u64 period_us, u64 quota_us, u64 burst_us) {}
|
||||
#endif
|
||||
static void sched_ext_ops__cpu_online(s32 cpu) {}
|
||||
static void sched_ext_ops__cpu_offline(s32 cpu) {}
|
||||
|
@ -5981,6 +6037,7 @@ static struct sched_ext_ops __bpf_ops_sched_ext_ops = {
|
|||
.cgroup_move = sched_ext_ops__cgroup_move,
|
||||
.cgroup_cancel_move = sched_ext_ops__cgroup_cancel_move,
|
||||
.cgroup_set_weight = sched_ext_ops__cgroup_set_weight,
|
||||
.cgroup_set_bandwidth = sched_ext_ops__cgroup_set_bandwidth,
|
||||
#endif
|
||||
.cpu_online = sched_ext_ops__cpu_online,
|
||||
.cpu_offline = sched_ext_ops__cpu_offline,
|
||||
|
@ -6338,7 +6395,8 @@ __bpf_kfunc_start_defs();
|
|||
* When called from ops.dispatch(), there are no restrictions on @p or @dsq_id
|
||||
* and this function can be called upto ops.dispatch_max_batch times to insert
|
||||
* multiple tasks. scx_bpf_dispatch_nr_slots() returns the number of the
|
||||
* remaining slots. scx_bpf_consume() flushes the batch and resets the counter.
|
||||
* remaining slots. scx_bpf_dsq_move_to_local() flushes the batch and resets the
|
||||
* counter.
|
||||
*
|
||||
* This function doesn't have any locking restrictions and may be called under
|
||||
* BPF locks (in the future when BPF introduces more flexible locking).
|
||||
|
@ -6362,14 +6420,6 @@ __bpf_kfunc void scx_bpf_dsq_insert(struct task_struct *p, u64 dsq_id, u64 slice
|
|||
scx_dsq_insert_commit(p, dsq_id, enq_flags);
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc void scx_bpf_dispatch(struct task_struct *p, u64 dsq_id, u64 slice,
|
||||
u64 enq_flags)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_dispatch() renamed to scx_bpf_dsq_insert()");
|
||||
scx_bpf_dsq_insert(p, dsq_id, slice, enq_flags);
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_bpf_dsq_insert_vtime - Insert a task into the vtime priority queue of a DSQ
|
||||
* @p: task_struct to insert
|
||||
|
@ -6407,21 +6457,11 @@ __bpf_kfunc void scx_bpf_dsq_insert_vtime(struct task_struct *p, u64 dsq_id,
|
|||
scx_dsq_insert_commit(p, dsq_id, enq_flags | SCX_ENQ_DSQ_PRIQ);
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc void scx_bpf_dispatch_vtime(struct task_struct *p, u64 dsq_id,
|
||||
u64 slice, u64 vtime, u64 enq_flags)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_dispatch_vtime() renamed to scx_bpf_dsq_insert_vtime()");
|
||||
scx_bpf_dsq_insert_vtime(p, dsq_id, slice, vtime, enq_flags);
|
||||
}
|
||||
|
||||
__bpf_kfunc_end_defs();
|
||||
|
||||
BTF_KFUNCS_START(scx_kfunc_ids_enqueue_dispatch)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_insert, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_insert_vtime, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_vtime, KF_RCU)
|
||||
BTF_KFUNCS_END(scx_kfunc_ids_enqueue_dispatch)
|
||||
|
||||
static const struct btf_kfunc_id_set scx_kfunc_set_enqueue_dispatch = {
|
||||
|
@ -6594,13 +6634,6 @@ __bpf_kfunc bool scx_bpf_dsq_move_to_local(u64 dsq_id)
|
|||
}
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc bool scx_bpf_consume(u64 dsq_id)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_consume() renamed to scx_bpf_dsq_move_to_local()");
|
||||
return scx_bpf_dsq_move_to_local(dsq_id);
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_bpf_dsq_move_set_slice - Override slice when moving between DSQs
|
||||
* @it__iter: DSQ iterator in progress
|
||||
|
@ -6619,14 +6652,6 @@ __bpf_kfunc void scx_bpf_dsq_move_set_slice(struct bpf_iter_scx_dsq *it__iter,
|
|||
kit->cursor.flags |= __SCX_DSQ_ITER_HAS_SLICE;
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc void scx_bpf_dispatch_from_dsq_set_slice(
|
||||
struct bpf_iter_scx_dsq *it__iter, u64 slice)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_dispatch_from_dsq_set_slice() renamed to scx_bpf_dsq_move_set_slice()");
|
||||
scx_bpf_dsq_move_set_slice(it__iter, slice);
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_bpf_dsq_move_set_vtime - Override vtime when moving between DSQs
|
||||
* @it__iter: DSQ iterator in progress
|
||||
|
@ -6646,14 +6671,6 @@ __bpf_kfunc void scx_bpf_dsq_move_set_vtime(struct bpf_iter_scx_dsq *it__iter,
|
|||
kit->cursor.flags |= __SCX_DSQ_ITER_HAS_VTIME;
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc void scx_bpf_dispatch_from_dsq_set_vtime(
|
||||
struct bpf_iter_scx_dsq *it__iter, u64 vtime)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_dispatch_from_dsq_set_vtime() renamed to scx_bpf_dsq_move_set_vtime()");
|
||||
scx_bpf_dsq_move_set_vtime(it__iter, vtime);
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_bpf_dsq_move - Move a task from DSQ iteration to a DSQ
|
||||
* @it__iter: DSQ iterator in progress
|
||||
|
@ -6686,15 +6703,6 @@ __bpf_kfunc bool scx_bpf_dsq_move(struct bpf_iter_scx_dsq *it__iter,
|
|||
p, dsq_id, enq_flags);
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc bool scx_bpf_dispatch_from_dsq(struct bpf_iter_scx_dsq *it__iter,
|
||||
struct task_struct *p, u64 dsq_id,
|
||||
u64 enq_flags)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_dispatch_from_dsq() renamed to scx_bpf_dsq_move()");
|
||||
return scx_bpf_dsq_move(it__iter, p, dsq_id, enq_flags);
|
||||
}
|
||||
|
||||
/**
|
||||
* scx_bpf_dsq_move_vtime - Move a task from DSQ iteration to a PRIQ DSQ
|
||||
* @it__iter: DSQ iterator in progress
|
||||
|
@ -6720,30 +6728,16 @@ __bpf_kfunc bool scx_bpf_dsq_move_vtime(struct bpf_iter_scx_dsq *it__iter,
|
|||
p, dsq_id, enq_flags | SCX_ENQ_DSQ_PRIQ);
|
||||
}
|
||||
|
||||
/* for backward compatibility, will be removed in v6.15 */
|
||||
__bpf_kfunc bool scx_bpf_dispatch_vtime_from_dsq(struct bpf_iter_scx_dsq *it__iter,
|
||||
struct task_struct *p, u64 dsq_id,
|
||||
u64 enq_flags)
|
||||
{
|
||||
printk_deferred_once(KERN_WARNING "sched_ext: scx_bpf_dispatch_from_dsq_vtime() renamed to scx_bpf_dsq_move_vtime()");
|
||||
return scx_bpf_dsq_move_vtime(it__iter, p, dsq_id, enq_flags);
|
||||
}
|
||||
|
||||
__bpf_kfunc_end_defs();
|
||||
|
||||
BTF_KFUNCS_START(scx_kfunc_ids_dispatch)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_nr_slots)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_cancel)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move_to_local)
|
||||
BTF_ID_FLAGS(func, scx_bpf_consume)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move_set_slice)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move_set_vtime)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move_vtime, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq_set_slice)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq_set_vtime)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_vtime_from_dsq, KF_RCU)
|
||||
BTF_KFUNCS_END(scx_kfunc_ids_dispatch)
|
||||
|
||||
static const struct btf_kfunc_id_set scx_kfunc_set_dispatch = {
|
||||
|
@ -6874,10 +6868,6 @@ BTF_ID_FLAGS(func, scx_bpf_dsq_move_set_slice)
|
|||
BTF_ID_FLAGS(func, scx_bpf_dsq_move_set_vtime)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dsq_move_vtime, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq_set_slice)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq_set_vtime)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_from_dsq, KF_RCU)
|
||||
BTF_ID_FLAGS(func, scx_bpf_dispatch_vtime_from_dsq, KF_RCU)
|
||||
BTF_KFUNCS_END(scx_kfunc_ids_unlocked)
|
||||
|
||||
static const struct btf_kfunc_id_set scx_kfunc_set_unlocked = {
|
||||
|
|
|
@ -13,8 +13,24 @@ static inline bool scx_kf_allowed_if_unlocked(void)
|
|||
return !current->scx.kf_mask;
|
||||
}
|
||||
|
||||
static inline bool scx_rq_bypassing(struct rq *rq)
|
||||
{
|
||||
return unlikely(rq->scx.flags & SCX_RQ_BYPASSING);
|
||||
}
|
||||
|
||||
DECLARE_STATIC_KEY_FALSE(scx_ops_allow_queued_wakeup);
|
||||
|
||||
DECLARE_PER_CPU(struct rq *, scx_locked_rq_state);
|
||||
|
||||
/*
|
||||
* Return the rq currently locked from an scx callback, or NULL if no rq is
|
||||
* locked.
|
||||
*/
|
||||
static inline struct rq *scx_locked_rq(void)
|
||||
{
|
||||
return __this_cpu_read(scx_locked_rq_state);
|
||||
}
|
||||
|
||||
void scx_tick(struct rq *rq);
|
||||
void init_scx_entity(struct sched_ext_entity *scx);
|
||||
void scx_pre_fork(struct task_struct *p);
|
||||
|
@ -65,7 +81,7 @@ static inline void init_sched_ext_class(void) {}
|
|||
|
||||
#endif /* CONFIG_SCHED_CLASS_EXT */
|
||||
|
||||
#if defined(CONFIG_SCHED_CLASS_EXT) && defined(CONFIG_SMP)
|
||||
#ifdef CONFIG_SCHED_CLASS_EXT
|
||||
void __scx_update_idle(struct rq *rq, bool idle, bool do_notify);
|
||||
|
||||
static inline void scx_update_idle(struct rq *rq, bool idle, bool do_notify)
|
||||
|
@ -88,6 +104,7 @@ void scx_cgroup_finish_attach(void);
|
|||
void scx_cgroup_cancel_attach(struct cgroup_taskset *tset);
|
||||
void scx_group_set_weight(struct task_group *tg, unsigned long cgrp_weight);
|
||||
void scx_group_set_idle(struct task_group *tg, bool idle);
|
||||
void scx_group_set_bandwidth(struct task_group *tg, u64 period_us, u64 quota_us, u64 burst_us);
|
||||
#else /* CONFIG_EXT_GROUP_SCHED */
|
||||
static inline void scx_tg_init(struct task_group *tg) {}
|
||||
static inline int scx_tg_online(struct task_group *tg) { return 0; }
|
||||
|
@ -98,5 +115,6 @@ static inline void scx_cgroup_finish_attach(void) {}
|
|||
static inline void scx_cgroup_cancel_attach(struct cgroup_taskset *tset) {}
|
||||
static inline void scx_group_set_weight(struct task_group *tg, unsigned long cgrp_weight) {}
|
||||
static inline void scx_group_set_idle(struct task_group *tg, bool idle) {}
|
||||
static inline void scx_group_set_bandwidth(struct task_group *tg, u64 period_us, u64 quota_us, u64 burst_us) {}
|
||||
#endif /* CONFIG_EXT_GROUP_SCHED */
|
||||
#endif /* CONFIG_CGROUP_SCHED */
|
||||
|
|
|
@ -17,7 +17,6 @@ static DEFINE_STATIC_KEY_FALSE(scx_builtin_idle_enabled);
|
|||
/* Enable/disable per-node idle cpumasks */
|
||||
static DEFINE_STATIC_KEY_FALSE(scx_builtin_idle_per_node);
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/* Enable/disable LLC aware optimizations */
|
||||
static DEFINE_STATIC_KEY_FALSE(scx_selcpu_topo_llc);
|
||||
|
||||
|
@ -75,7 +74,7 @@ static int scx_cpu_node_if_enabled(int cpu)
|
|||
return cpu_to_node(cpu);
|
||||
}
|
||||
|
||||
bool scx_idle_test_and_clear_cpu(int cpu)
|
||||
static bool scx_idle_test_and_clear_cpu(int cpu)
|
||||
{
|
||||
int node = scx_cpu_node_if_enabled(cpu);
|
||||
struct cpumask *idle_cpus = idle_cpumask(node)->cpu;
|
||||
|
@ -198,7 +197,7 @@ pick_idle_cpu_from_online_nodes(const struct cpumask *cpus_allowed, int node, u6
|
|||
/*
|
||||
* Find an idle CPU in the system, starting from @node.
|
||||
*/
|
||||
s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags)
|
||||
static s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags)
|
||||
{
|
||||
s32 cpu;
|
||||
|
||||
|
@ -250,7 +249,7 @@ static struct cpumask *llc_span(s32 cpu)
|
|||
|
||||
sd = rcu_dereference(per_cpu(sd_llc, cpu));
|
||||
if (!sd)
|
||||
return 0;
|
||||
return NULL;
|
||||
|
||||
return sched_domain_span(sd);
|
||||
}
|
||||
|
@ -794,7 +793,6 @@ static void reset_idle_masks(struct sched_ext_ops *ops)
|
|||
cpumask_and(idle_cpumask(node)->smt, cpu_online_mask, node_mask);
|
||||
}
|
||||
}
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
void scx_idle_enable(struct sched_ext_ops *ops)
|
||||
{
|
||||
|
@ -808,9 +806,7 @@ void scx_idle_enable(struct sched_ext_ops *ops)
|
|||
else
|
||||
static_branch_disable_cpuslocked(&scx_builtin_idle_per_node);
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
reset_idle_masks(ops);
|
||||
#endif
|
||||
}
|
||||
|
||||
void scx_idle_disable(void)
|
||||
|
@ -860,8 +856,8 @@ static bool check_builtin_idle_enabled(void)
|
|||
return false;
|
||||
}
|
||||
|
||||
s32 select_cpu_from_kfunc(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
|
||||
const struct cpumask *allowed, u64 flags)
|
||||
static s32 select_cpu_from_kfunc(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
|
||||
const struct cpumask *allowed, u64 flags)
|
||||
{
|
||||
struct rq *rq;
|
||||
struct rq_flags rf;
|
||||
|
@ -896,7 +892,6 @@ s32 select_cpu_from_kfunc(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
|
|||
if (!rq)
|
||||
lockdep_assert_held(&p->pi_lock);
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
/*
|
||||
* This may also be called from ops.enqueue(), so we need to handle
|
||||
* per-CPU tasks as well. For these tasks, we can skip all idle CPU
|
||||
|
@ -913,9 +908,7 @@ s32 select_cpu_from_kfunc(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
|
|||
cpu = scx_select_cpu_dfl(p, prev_cpu, wake_flags,
|
||||
allowed ?: p->cpus_ptr, flags);
|
||||
}
|
||||
#else
|
||||
cpu = -EBUSY;
|
||||
#endif
|
||||
|
||||
if (scx_kf_allowed_if_unlocked())
|
||||
task_rq_unlock(rq, p, &rf);
|
||||
|
||||
|
@ -929,14 +922,10 @@ s32 select_cpu_from_kfunc(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
|
|||
*/
|
||||
__bpf_kfunc int scx_bpf_cpu_node(s32 cpu)
|
||||
{
|
||||
#ifdef CONFIG_NUMA
|
||||
if (!kf_cpu_valid(cpu, NULL))
|
||||
return NUMA_NO_NODE;
|
||||
|
||||
return cpu_to_node(cpu);
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -1010,11 +999,7 @@ __bpf_kfunc const struct cpumask *scx_bpf_get_idle_cpumask_node(int node)
|
|||
if (node < 0)
|
||||
return cpu_none_mask;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
return idle_cpumask(node)->cpu;
|
||||
#else
|
||||
return cpu_none_mask;
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -1034,11 +1019,7 @@ __bpf_kfunc const struct cpumask *scx_bpf_get_idle_cpumask(void)
|
|||
if (!check_builtin_idle_enabled())
|
||||
return cpu_none_mask;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
return idle_cpumask(NUMA_NO_NODE)->cpu;
|
||||
#else
|
||||
return cpu_none_mask;
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -1057,14 +1038,10 @@ __bpf_kfunc const struct cpumask *scx_bpf_get_idle_smtmask_node(int node)
|
|||
if (node < 0)
|
||||
return cpu_none_mask;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
if (sched_smt_active())
|
||||
return idle_cpumask(node)->smt;
|
||||
else
|
||||
return idle_cpumask(node)->cpu;
|
||||
#else
|
||||
return cpu_none_mask;
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -1085,14 +1062,10 @@ __bpf_kfunc const struct cpumask *scx_bpf_get_idle_smtmask(void)
|
|||
if (!check_builtin_idle_enabled())
|
||||
return cpu_none_mask;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
if (sched_smt_active())
|
||||
return idle_cpumask(NUMA_NO_NODE)->smt;
|
||||
else
|
||||
return idle_cpumask(NUMA_NO_NODE)->cpu;
|
||||
#else
|
||||
return cpu_none_mask;
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -1125,10 +1098,10 @@ __bpf_kfunc bool scx_bpf_test_and_clear_cpu_idle(s32 cpu)
|
|||
if (!check_builtin_idle_enabled())
|
||||
return false;
|
||||
|
||||
if (kf_cpu_valid(cpu, NULL))
|
||||
return scx_idle_test_and_clear_cpu(cpu);
|
||||
else
|
||||
if (!kf_cpu_valid(cpu, NULL))
|
||||
return false;
|
||||
|
||||
return scx_idle_test_and_clear_cpu(cpu);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
|
@ -12,20 +12,8 @@
|
|||
|
||||
struct sched_ext_ops;
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
void scx_idle_update_selcpu_topology(struct sched_ext_ops *ops);
|
||||
void scx_idle_init_masks(void);
|
||||
bool scx_idle_test_and_clear_cpu(int cpu);
|
||||
s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags);
|
||||
#else /* !CONFIG_SMP */
|
||||
static inline void scx_idle_update_selcpu_topology(struct sched_ext_ops *ops) {}
|
||||
static inline void scx_idle_init_masks(void) {}
|
||||
static inline bool scx_idle_test_and_clear_cpu(int cpu) { return false; }
|
||||
static inline s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags)
|
||||
{
|
||||
return -EBUSY;
|
||||
}
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
s32 scx_select_cpu_dfl(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
|
||||
const struct cpumask *cpus_allowed, u64 flags);
|
||||
|
|
|
@ -403,7 +403,7 @@ static inline bool dl_server_active(struct sched_dl_entity *dl_se)
|
|||
|
||||
extern struct list_head task_groups;
|
||||
|
||||
#ifdef CONFIG_CFS_BANDWIDTH
|
||||
#ifdef CONFIG_GROUP_SCHED_BANDWIDTH
|
||||
extern const u64 max_bw_quota_period_us;
|
||||
|
||||
/*
|
||||
|
@ -414,7 +414,7 @@ static inline u64 default_bw_period_us(void)
|
|||
{
|
||||
return 100000ULL;
|
||||
}
|
||||
#endif /* CONFIG_CFS_BANDWIDTH */
|
||||
#endif /* CONFIG_GROUP_SCHED_BANDWIDTH */
|
||||
|
||||
struct cfs_bandwidth {
|
||||
#ifdef CONFIG_CFS_BANDWIDTH
|
||||
|
@ -472,10 +472,7 @@ struct task_group {
|
|||
struct rt_bandwidth rt_bandwidth;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_EXT_GROUP_SCHED
|
||||
u32 scx_flags; /* SCX_TG_* */
|
||||
u32 scx_weight;
|
||||
#endif
|
||||
struct scx_task_group scx;
|
||||
|
||||
struct rcu_head rcu;
|
||||
struct list_head list;
|
||||
|
|
|
@ -615,6 +615,26 @@ void BPF_STRUCT_OPS(qmap_dump_task, struct scx_dump_ctx *dctx, struct task_struc
|
|||
taskc->force_local, taskc->core_sched_seq);
|
||||
}
|
||||
|
||||
s32 BPF_STRUCT_OPS(qmap_cgroup_init, struct cgroup *cgrp, struct scx_cgroup_init_args *args)
|
||||
{
|
||||
bpf_printk("CGRP INIT %llu weight=%u period=%lu quota=%ld burst=%lu",
|
||||
cgrp->kn->id, args->weight, args->bw_period_us,
|
||||
args->bw_quota_us, args->bw_burst_us);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void BPF_STRUCT_OPS(qmap_cgroup_set_weight, struct cgroup *cgrp, u32 weight)
|
||||
{
|
||||
bpf_printk("CGRP SET %llu weight=%u", cgrp->kn->id, weight);
|
||||
}
|
||||
|
||||
void BPF_STRUCT_OPS(qmap_cgroup_set_bandwidth, struct cgroup *cgrp,
|
||||
u64 period_us, u64 quota_us, u64 burst_us)
|
||||
{
|
||||
bpf_printk("CGRP SET %llu period=%lu quota=%ld burst=%lu", cgrp->kn->id,
|
||||
period_us, quota_us, burst_us);
|
||||
}
|
||||
|
||||
/*
|
||||
* Print out the online and possible CPU map using bpf_printk() as a
|
||||
* demonstration of using the cpumask kfuncs and ops.cpu_on/offline().
|
||||
|
@ -840,6 +860,9 @@ SCX_OPS_DEFINE(qmap_ops,
|
|||
.dump = (void *)qmap_dump,
|
||||
.dump_cpu = (void *)qmap_dump_cpu,
|
||||
.dump_task = (void *)qmap_dump_task,
|
||||
.cgroup_init = (void *)qmap_cgroup_init,
|
||||
.cgroup_set_weight = (void *)qmap_cgroup_set_weight,
|
||||
.cgroup_set_bandwidth = (void *)qmap_cgroup_set_bandwidth,
|
||||
.cpu_online = (void *)qmap_cpu_online,
|
||||
.cpu_offline = (void *)qmap_cpu_offline,
|
||||
.init = (void *)qmap_init,
|
||||
|
|
|
@ -123,6 +123,10 @@ void BPF_STRUCT_OPS(maximal_cgroup_cancel_move, struct task_struct *p,
|
|||
void BPF_STRUCT_OPS(maximal_cgroup_set_weight, struct cgroup *cgrp, u32 weight)
|
||||
{}
|
||||
|
||||
void BPF_STRUCT_OPS(maximal_cgroup_set_bandwidth, struct cgroup *cgrp,
|
||||
u64 period_us, u64 quota_us, u64 burst_us)
|
||||
{}
|
||||
|
||||
s32 BPF_STRUCT_OPS_SLEEPABLE(maximal_init)
|
||||
{
|
||||
return scx_bpf_create_dsq(DSQ_ID, -1);
|
||||
|
@ -160,6 +164,7 @@ struct sched_ext_ops maximal_ops = {
|
|||
.cgroup_move = (void *) maximal_cgroup_move,
|
||||
.cgroup_cancel_move = (void *) maximal_cgroup_cancel_move,
|
||||
.cgroup_set_weight = (void *) maximal_cgroup_set_weight,
|
||||
.cgroup_set_bandwidth = (void *) maximal_cgroup_set_bandwidth,
|
||||
.init = (void *) maximal_init,
|
||||
.exit = (void *) maximal_exit,
|
||||
.name = "maximal",
|
||||
|
|
Loading…
Reference in New Issue