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-rw-r--r--tools/sched_ext/include/scx/common.bpf.h4
-rw-r--r--tools/sched_ext/include/scx/compat.bpf.h26
-rw-r--r--tools/sched_ext/scx_central.bpf.c10
-rw-r--r--tools/sched_ext/scx_flatcg.bpf.c14
-rw-r--r--tools/sched_ext/scx_qmap.bpf.c12
-rw-r--r--tools/sched_ext/scx_simple.bpf.c14
6 files changed, 54 insertions, 26 deletions
diff --git a/tools/sched_ext/include/scx/common.bpf.h b/tools/sched_ext/include/scx/common.bpf.h
index 248ab790d143..16c7100c69e4 100644
--- a/tools/sched_ext/include/scx/common.bpf.h
+++ b/tools/sched_ext/include/scx/common.bpf.h
@@ -36,8 +36,8 @@ static inline void ___vmlinux_h_sanity_check___(void)
s32 scx_bpf_create_dsq(u64 dsq_id, s32 node) __ksym;
s32 scx_bpf_select_cpu_dfl(struct task_struct *p, s32 prev_cpu, u64 wake_flags, bool *is_idle) __ksym;
-void scx_bpf_dispatch(struct task_struct *p, u64 dsq_id, u64 slice, u64 enq_flags) __ksym;
-void scx_bpf_dispatch_vtime(struct task_struct *p, u64 dsq_id, u64 slice, u64 vtime, u64 enq_flags) __ksym;
+void scx_bpf_dsq_insert(struct task_struct *p, u64 dsq_id, u64 slice, u64 enq_flags) __ksym __weak;
+void scx_bpf_dsq_insert_vtime(struct task_struct *p, u64 dsq_id, u64 slice, u64 vtime, u64 enq_flags) __ksym __weak;
u32 scx_bpf_dispatch_nr_slots(void) __ksym;
void scx_bpf_dispatch_cancel(void) __ksym;
bool scx_bpf_consume(u64 dsq_id) __ksym;
diff --git a/tools/sched_ext/include/scx/compat.bpf.h b/tools/sched_ext/include/scx/compat.bpf.h
index e5afe9efd3f3..183aa4c6f674 100644
--- a/tools/sched_ext/include/scx/compat.bpf.h
+++ b/tools/sched_ext/include/scx/compat.bpf.h
@@ -35,6 +35,32 @@
scx_bpf_dispatch_vtime_from_dsq((it), (p), (dsq_id), (enq_flags)) : false)
/*
+ * v6.13: The verb `dispatch` was too overloaded and confusing. kfuncs are
+ * renamed to unload the verb.
+ *
+ * Build error is triggered if old names are used. New binaries work with both
+ * new and old names. The compat macros will be removed on v6.15 release.
+ */
+void scx_bpf_dispatch___compat(struct task_struct *p, u64 dsq_id, u64 slice, u64 enq_flags) __ksym __weak;
+void scx_bpf_dispatch_vtime___compat(struct task_struct *p, u64 dsq_id, u64 slice, u64 vtime, u64 enq_flags) __ksym __weak;
+
+#define scx_bpf_dsq_insert(p, dsq_id, slice, enq_flags) \
+ (bpf_ksym_exists(scx_bpf_dsq_insert) ? \
+ scx_bpf_dsq_insert((p), (dsq_id), (slice), (enq_flags)) : \
+ scx_bpf_dispatch___compat((p), (dsq_id), (slice), (enq_flags)))
+
+#define scx_bpf_dsq_insert_vtime(p, dsq_id, slice, vtime, enq_flags) \
+ (bpf_ksym_exists(scx_bpf_dsq_insert_vtime) ? \
+ scx_bpf_dsq_insert_vtime((p), (dsq_id), (slice), (vtime), (enq_flags)) : \
+ scx_bpf_dispatch_vtime___compat((p), (dsq_id), (slice), (vtime), (enq_flags)))
+
+#define scx_bpf_dispatch(p, dsq_id, slice, enq_flags) \
+ _Static_assert(false, "scx_bpf_dispatch() renamed to scx_bpf_dsq_insert()")
+
+#define scx_bpf_dispatch_vtime(p, dsq_id, slice, vtime, enq_flags) \
+ _Static_assert(false, "scx_bpf_dispatch_vtime() renamed to scx_bpf_dsq_insert_vtime()")
+
+/*
* Define sched_ext_ops. This may be expanded to define multiple variants for
* backward compatibility. See compat.h::SCX_OPS_LOAD/ATTACH().
*/
diff --git a/tools/sched_ext/scx_central.bpf.c b/tools/sched_ext/scx_central.bpf.c
index 8dd8eb73b6b8..153d9656c75f 100644
--- a/tools/sched_ext/scx_central.bpf.c
+++ b/tools/sched_ext/scx_central.bpf.c
@@ -118,14 +118,14 @@ void BPF_STRUCT_OPS(central_enqueue, struct task_struct *p, u64 enq_flags)
*/
if ((p->flags & PF_KTHREAD) && p->nr_cpus_allowed == 1) {
__sync_fetch_and_add(&nr_locals, 1);
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL, SCX_SLICE_INF,
- enq_flags | SCX_ENQ_PREEMPT);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL, SCX_SLICE_INF,
+ enq_flags | SCX_ENQ_PREEMPT);
return;
}
if (bpf_map_push_elem(&central_q, &pid, 0)) {
__sync_fetch_and_add(&nr_overflows, 1);
- scx_bpf_dispatch(p, FALLBACK_DSQ_ID, SCX_SLICE_INF, enq_flags);
+ scx_bpf_dsq_insert(p, FALLBACK_DSQ_ID, SCX_SLICE_INF, enq_flags);
return;
}
@@ -158,7 +158,7 @@ static bool dispatch_to_cpu(s32 cpu)
*/
if (!bpf_cpumask_test_cpu(cpu, p->cpus_ptr)) {
__sync_fetch_and_add(&nr_mismatches, 1);
- scx_bpf_dispatch(p, FALLBACK_DSQ_ID, SCX_SLICE_INF, 0);
+ scx_bpf_dsq_insert(p, FALLBACK_DSQ_ID, SCX_SLICE_INF, 0);
bpf_task_release(p);
/*
* We might run out of dispatch buffer slots if we continue dispatching
@@ -172,7 +172,7 @@ static bool dispatch_to_cpu(s32 cpu)
}
/* dispatch to local and mark that @cpu doesn't need more */
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL_ON | cpu, SCX_SLICE_INF, 0);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL_ON | cpu, SCX_SLICE_INF, 0);
if (cpu != central_cpu)
scx_bpf_kick_cpu(cpu, SCX_KICK_IDLE);
diff --git a/tools/sched_ext/scx_flatcg.bpf.c b/tools/sched_ext/scx_flatcg.bpf.c
index b722baf6da4b..4dcb6c747b46 100644
--- a/tools/sched_ext/scx_flatcg.bpf.c
+++ b/tools/sched_ext/scx_flatcg.bpf.c
@@ -341,7 +341,7 @@ s32 BPF_STRUCT_OPS(fcg_select_cpu, struct task_struct *p, s32 prev_cpu, u64 wake
if (is_idle) {
set_bypassed_at(p, taskc);
stat_inc(FCG_STAT_LOCAL);
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL, SCX_SLICE_DFL, 0);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL, SCX_SLICE_DFL, 0);
}
return cpu;
@@ -377,10 +377,12 @@ void BPF_STRUCT_OPS(fcg_enqueue, struct task_struct *p, u64 enq_flags)
*/
if (p->nr_cpus_allowed == 1 && (p->flags & PF_KTHREAD)) {
stat_inc(FCG_STAT_LOCAL);
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL, SCX_SLICE_DFL, enq_flags);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL, SCX_SLICE_DFL,
+ enq_flags);
} else {
stat_inc(FCG_STAT_GLOBAL);
- scx_bpf_dispatch(p, FALLBACK_DSQ, SCX_SLICE_DFL, enq_flags);
+ scx_bpf_dsq_insert(p, FALLBACK_DSQ, SCX_SLICE_DFL,
+ enq_flags);
}
return;
}
@@ -391,7 +393,7 @@ void BPF_STRUCT_OPS(fcg_enqueue, struct task_struct *p, u64 enq_flags)
goto out_release;
if (fifo_sched) {
- scx_bpf_dispatch(p, cgrp->kn->id, SCX_SLICE_DFL, enq_flags);
+ scx_bpf_dsq_insert(p, cgrp->kn->id, SCX_SLICE_DFL, enq_flags);
} else {
u64 tvtime = p->scx.dsq_vtime;
@@ -402,8 +404,8 @@ void BPF_STRUCT_OPS(fcg_enqueue, struct task_struct *p, u64 enq_flags)
if (vtime_before(tvtime, cgc->tvtime_now - SCX_SLICE_DFL))
tvtime = cgc->tvtime_now - SCX_SLICE_DFL;
- scx_bpf_dispatch_vtime(p, cgrp->kn->id, SCX_SLICE_DFL,
- tvtime, enq_flags);
+ scx_bpf_dsq_insert_vtime(p, cgrp->kn->id, SCX_SLICE_DFL,
+ tvtime, enq_flags);
}
cgrp_enqueued(cgrp, cgc);
diff --git a/tools/sched_ext/scx_qmap.bpf.c b/tools/sched_ext/scx_qmap.bpf.c
index 5d1f880d1149..65c52cc4fffb 100644
--- a/tools/sched_ext/scx_qmap.bpf.c
+++ b/tools/sched_ext/scx_qmap.bpf.c
@@ -226,7 +226,7 @@ void BPF_STRUCT_OPS(qmap_enqueue, struct task_struct *p, u64 enq_flags)
*/
if (tctx->force_local) {
tctx->force_local = false;
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL, slice_ns, enq_flags);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL, slice_ns, enq_flags);
return;
}
@@ -234,7 +234,7 @@ void BPF_STRUCT_OPS(qmap_enqueue, struct task_struct *p, u64 enq_flags)
if (!(enq_flags & SCX_ENQ_CPU_SELECTED) &&
(cpu = pick_direct_dispatch_cpu(p, scx_bpf_task_cpu(p))) >= 0) {
__sync_fetch_and_add(&nr_ddsp_from_enq, 1);
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL_ON | cpu, slice_ns, enq_flags);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL_ON | cpu, slice_ns, enq_flags);
return;
}
@@ -247,7 +247,7 @@ void BPF_STRUCT_OPS(qmap_enqueue, struct task_struct *p, u64 enq_flags)
if (enq_flags & SCX_ENQ_REENQ) {
s32 cpu;
- scx_bpf_dispatch(p, SHARED_DSQ, 0, enq_flags);
+ scx_bpf_dsq_insert(p, SHARED_DSQ, 0, enq_flags);
cpu = scx_bpf_pick_idle_cpu(p->cpus_ptr, 0);
if (cpu >= 0)
scx_bpf_kick_cpu(cpu, SCX_KICK_IDLE);
@@ -262,7 +262,7 @@ void BPF_STRUCT_OPS(qmap_enqueue, struct task_struct *p, u64 enq_flags)
/* Queue on the selected FIFO. If the FIFO overflows, punt to global. */
if (bpf_map_push_elem(ring, &pid, 0)) {
- scx_bpf_dispatch(p, SHARED_DSQ, slice_ns, enq_flags);
+ scx_bpf_dsq_insert(p, SHARED_DSQ, slice_ns, enq_flags);
return;
}
@@ -385,7 +385,7 @@ void BPF_STRUCT_OPS(qmap_dispatch, s32 cpu, struct task_struct *prev)
*/
p = bpf_task_from_pid(2);
if (p) {
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL, slice_ns, 0);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL, slice_ns, 0);
bpf_task_release(p);
return;
}
@@ -431,7 +431,7 @@ void BPF_STRUCT_OPS(qmap_dispatch, s32 cpu, struct task_struct *prev)
update_core_sched_head_seq(p);
__sync_fetch_and_add(&nr_dispatched, 1);
- scx_bpf_dispatch(p, SHARED_DSQ, slice_ns, 0);
+ scx_bpf_dsq_insert(p, SHARED_DSQ, slice_ns, 0);
bpf_task_release(p);
batch--;
diff --git a/tools/sched_ext/scx_simple.bpf.c b/tools/sched_ext/scx_simple.bpf.c
index ed7e8d535fc5..ce86a4a690b5 100644
--- a/tools/sched_ext/scx_simple.bpf.c
+++ b/tools/sched_ext/scx_simple.bpf.c
@@ -31,10 +31,10 @@ UEI_DEFINE(uei);
/*
* Built-in DSQs such as SCX_DSQ_GLOBAL cannot be used as priority queues
- * (meaning, cannot be dispatched to with scx_bpf_dispatch_vtime()). We
+ * (meaning, cannot be dispatched to with scx_bpf_dsq_insert_vtime()). We
* therefore create a separate DSQ with ID 0 that we dispatch to and consume
- * from. If scx_simple only supported global FIFO scheduling, then we could
- * just use SCX_DSQ_GLOBAL.
+ * from. If scx_simple only supported global FIFO scheduling, then we could just
+ * use SCX_DSQ_GLOBAL.
*/
#define SHARED_DSQ 0
@@ -65,7 +65,7 @@ s32 BPF_STRUCT_OPS(simple_select_cpu, struct task_struct *p, s32 prev_cpu, u64 w
cpu = scx_bpf_select_cpu_dfl(p, prev_cpu, wake_flags, &is_idle);
if (is_idle) {
stat_inc(0); /* count local queueing */
- scx_bpf_dispatch(p, SCX_DSQ_LOCAL, SCX_SLICE_DFL, 0);
+ scx_bpf_dsq_insert(p, SCX_DSQ_LOCAL, SCX_SLICE_DFL, 0);
}
return cpu;
@@ -76,7 +76,7 @@ void BPF_STRUCT_OPS(simple_enqueue, struct task_struct *p, u64 enq_flags)
stat_inc(1); /* count global queueing */
if (fifo_sched) {
- scx_bpf_dispatch(p, SHARED_DSQ, SCX_SLICE_DFL, enq_flags);
+ scx_bpf_dsq_insert(p, SHARED_DSQ, SCX_SLICE_DFL, enq_flags);
} else {
u64 vtime = p->scx.dsq_vtime;
@@ -87,8 +87,8 @@ void BPF_STRUCT_OPS(simple_enqueue, struct task_struct *p, u64 enq_flags)
if (vtime_before(vtime, vtime_now - SCX_SLICE_DFL))
vtime = vtime_now - SCX_SLICE_DFL;
- scx_bpf_dispatch_vtime(p, SHARED_DSQ, SCX_SLICE_DFL, vtime,
- enq_flags);
+ scx_bpf_dsq_insert_vtime(p, SHARED_DSQ, SCX_SLICE_DFL, vtime,
+ enq_flags);
}
}
generated by cgit (git 2.34.1) at 2025-04-23 06:32:02 +0000