From: Tejun Heo <tj@kernel.org>
To: torvalds@linux-foundation.org, mingo@redhat.com,
peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
bristot@redhat.com, vschneid@redhat.com, ast@kernel.org,
daniel@iogearbox.net, andrii@kernel.org, martin.lau@kernel.org,
joshdon@google.com, brho@google.com, pjt@google.com,
derkling@google.com, haoluo@google.com, dvernet@meta.com,
dschatzberg@meta.com, dskarlat@cs.cmu.edu, riel@surriel.com,
changwoo@igalia.com, himadrics@inria.fr, memxor@gmail.com,
andrea.righi@canonical.com, joel@joelfernandes.org
Cc: linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
kernel-team@meta.com, Tejun Heo <tj@kernel.org>,
Julia Lawall <julia.lawall@inria.fr>
Subject: [PATCH 23/39] sched_ext: Add a central scheduler which makes all scheduling decisions on one CPU
Date: Wed, 1 May 2024 05:09:58 -1000 [thread overview]
Message-ID: <20240501151312.635565-24-tj@kernel.org> (raw)
In-Reply-To: <20240501151312.635565-1-tj@kernel.org>
This patch adds a new example scheduler, scx_central, which demonstrates
central scheduling where one CPU is responsible for making all scheduling
decisions in the system using scx_bpf_kick_cpu(). The central CPU makes
scheduling decisions for all CPUs in the system, queues tasks on the
appropriate local dsq's and preempts the worker CPUs. The worker CPUs in
turn preempt the central CPU when it needs tasks to run.
Currently, every CPU depends on its own tick to expire the current task. A
follow-up patch implementing tickless support for sched_ext will allow the
worker CPUs to go full tickless so that they can run completely undisturbed.
v3: - Kumar fixed a bug where the dispatch path could overflow the dispatch
buffer if too many are dispatched to the fallback DSQ.
- Use the new SCX_KICK_IDLE to wake up non-central CPUs.
- Dropped '-p' option.
v2: - Use RESIZABLE_ARRAY() instead of fixed MAX_CPUS and use SCX_BUG[_ON]()
to simplify error handling.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: David Vernet <dvernet@meta.com>
Acked-by: Josh Don <joshdon@google.com>
Acked-by: Hao Luo <haoluo@google.com>
Acked-by: Barret Rhoden <brho@google.com>
Cc: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Cc: Julia Lawall <julia.lawall@inria.fr>
---
tools/sched_ext/Makefile | 2 +-
tools/sched_ext/scx_central.bpf.c | 214 ++++++++++++++++++++++++++++++
tools/sched_ext/scx_central.c | 105 +++++++++++++++
3 files changed, 320 insertions(+), 1 deletion(-)
create mode 100644 tools/sched_ext/scx_central.bpf.c
create mode 100644 tools/sched_ext/scx_central.c
diff --git a/tools/sched_ext/Makefile b/tools/sched_ext/Makefile
index 626782a21375..bf7e108f5ae1 100644
--- a/tools/sched_ext/Makefile
+++ b/tools/sched_ext/Makefile
@@ -176,7 +176,7 @@ $(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BP
SCX_COMMON_DEPS := include/scx/common.h include/scx/user_exit_info.h | $(BINDIR)
-c-sched-targets = scx_simple scx_qmap
+c-sched-targets = scx_simple scx_qmap scx_central
$(addprefix $(BINDIR)/,$(c-sched-targets)): \
$(BINDIR)/%: \
diff --git a/tools/sched_ext/scx_central.bpf.c b/tools/sched_ext/scx_central.bpf.c
new file mode 100644
index 000000000000..3d980375a058
--- /dev/null
+++ b/tools/sched_ext/scx_central.bpf.c
@@ -0,0 +1,214 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * A central FIFO sched_ext scheduler which demonstrates the followings:
+ *
+ * a. Making all scheduling decisions from one CPU:
+ *
+ * The central CPU is the only one making scheduling decisions. All other
+ * CPUs kick the central CPU when they run out of tasks to run.
+ *
+ * There is one global BPF queue and the central CPU schedules all CPUs by
+ * dispatching from the global queue to each CPU's local dsq from dispatch().
+ * This isn't the most straightforward. e.g. It'd be easier to bounce
+ * through per-CPU BPF queues. The current design is chosen to maximally
+ * utilize and verify various SCX mechanisms such as LOCAL_ON dispatching.
+ *
+ * b. Preemption
+ *
+ * SCX_KICK_PREEMPT is used to trigger scheduling and CPUs to move to the
+ * next tasks.
+ *
+ * This scheduler is designed to maximize usage of various SCX mechanisms. A
+ * more practical implementation would likely put the scheduling loop outside
+ * the central CPU's dispatch() path and add some form of priority mechanism.
+ *
+ * Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
+ * Copyright (c) 2022 Tejun Heo <tj@kernel.org>
+ * Copyright (c) 2022 David Vernet <dvernet@meta.com>
+ */
+#include <scx/common.bpf.h>
+
+char _license[] SEC("license") = "GPL";
+
+enum {
+ FALLBACK_DSQ_ID = 0,
+};
+
+const volatile s32 central_cpu;
+const volatile u32 nr_cpu_ids = 1; /* !0 for veristat, set during init */
+const volatile u64 slice_ns = SCX_SLICE_DFL;
+
+u64 nr_total, nr_locals, nr_queued, nr_lost_pids;
+u64 nr_dispatches, nr_mismatches, nr_retries;
+u64 nr_overflows;
+
+UEI_DEFINE(uei);
+
+struct {
+ __uint(type, BPF_MAP_TYPE_QUEUE);
+ __uint(max_entries, 4096);
+ __type(value, s32);
+} central_q SEC(".maps");
+
+/* can't use percpu map due to bad lookups */
+bool RESIZABLE_ARRAY(data, cpu_gimme_task);
+
+s32 BPF_STRUCT_OPS(central_select_cpu, struct task_struct *p,
+ s32 prev_cpu, u64 wake_flags)
+{
+ /*
+ * Steer wakeups to the central CPU as much as possible to avoid
+ * disturbing other CPUs. It's safe to blindly return the central cpu as
+ * select_cpu() is a hint and if @p can't be on it, the kernel will
+ * automatically pick a fallback CPU.
+ */
+ return central_cpu;
+}
+
+void BPF_STRUCT_OPS(central_enqueue, struct task_struct *p, u64 enq_flags)
+{
+ s32 pid = p->pid;
+
+ __sync_fetch_and_add(&nr_total, 1);
+
+ if (bpf_map_push_elem(¢ral_q, &pid, 0)) {
+ __sync_fetch_and_add(&nr_overflows, 1);
+ scx_bpf_dispatch(p, FALLBACK_DSQ_ID, SCX_SLICE_DFL, enq_flags);
+ return;
+ }
+
+ __sync_fetch_and_add(&nr_queued, 1);
+
+ if (!scx_bpf_task_running(p))
+ scx_bpf_kick_cpu(central_cpu, SCX_KICK_PREEMPT);
+}
+
+static bool dispatch_to_cpu(s32 cpu)
+{
+ struct task_struct *p;
+ s32 pid;
+
+ bpf_repeat(BPF_MAX_LOOPS) {
+ if (bpf_map_pop_elem(¢ral_q, &pid))
+ break;
+
+ __sync_fetch_and_sub(&nr_queued, 1);
+
+ p = bpf_task_from_pid(pid);
+ if (!p) {
+ __sync_fetch_and_add(&nr_lost_pids, 1);
+ continue;
+ }
+
+ /*
+ * If we can't run the task at the top, do the dumb thing and
+ * bounce it to the fallback dsq.
+ */
+ 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_DFL, 0);
+ bpf_task_release(p);
+ /*
+ * We might run out of dispatch buffer slots if we continue dispatching
+ * to the fallback DSQ, without dispatching to the local DSQ of the
+ * target CPU. In such a case, break the loop now as will fail the
+ * next dispatch operation.
+ */
+ if (!scx_bpf_dispatch_nr_slots())
+ break;
+ continue;
+ }
+
+ /* dispatch to local and mark that @cpu doesn't need more */
+ scx_bpf_dispatch(p, SCX_DSQ_LOCAL_ON | cpu, SCX_SLICE_DFL, 0);
+
+ if (cpu != central_cpu)
+ scx_bpf_kick_cpu(cpu, __COMPAT_SCX_KICK_IDLE);
+
+ bpf_task_release(p);
+ return true;
+ }
+
+ return false;
+}
+
+void BPF_STRUCT_OPS(central_dispatch, s32 cpu, struct task_struct *prev)
+{
+ if (cpu == central_cpu) {
+ /* dispatch for all other CPUs first */
+ __sync_fetch_and_add(&nr_dispatches, 1);
+
+ bpf_for(cpu, 0, nr_cpu_ids) {
+ bool *gimme;
+
+ if (!scx_bpf_dispatch_nr_slots())
+ break;
+
+ /* central's gimme is never set */
+ gimme = ARRAY_ELEM_PTR(cpu_gimme_task, cpu, nr_cpu_ids);
+ if (gimme && !*gimme)
+ continue;
+
+ if (dispatch_to_cpu(cpu))
+ *gimme = false;
+ }
+
+ /*
+ * Retry if we ran out of dispatch buffer slots as we might have
+ * skipped some CPUs and also need to dispatch for self. The ext
+ * core automatically retries if the local dsq is empty but we
+ * can't rely on that as we're dispatching for other CPUs too.
+ * Kick self explicitly to retry.
+ */
+ if (!scx_bpf_dispatch_nr_slots()) {
+ __sync_fetch_and_add(&nr_retries, 1);
+ scx_bpf_kick_cpu(central_cpu, SCX_KICK_PREEMPT);
+ return;
+ }
+
+ /* look for a task to run on the central CPU */
+ if (scx_bpf_consume(FALLBACK_DSQ_ID))
+ return;
+ dispatch_to_cpu(central_cpu);
+ } else {
+ bool *gimme;
+
+ if (scx_bpf_consume(FALLBACK_DSQ_ID))
+ return;
+
+ gimme = ARRAY_ELEM_PTR(cpu_gimme_task, cpu, nr_cpu_ids);
+ if (gimme)
+ *gimme = true;
+
+ /*
+ * Force dispatch on the scheduling CPU so that it finds a task
+ * to run for us.
+ */
+ scx_bpf_kick_cpu(central_cpu, SCX_KICK_PREEMPT);
+ }
+}
+
+int BPF_STRUCT_OPS_SLEEPABLE(central_init)
+{
+ return scx_bpf_create_dsq(FALLBACK_DSQ_ID, -1);
+}
+
+void BPF_STRUCT_OPS(central_exit, struct scx_exit_info *ei)
+{
+ UEI_RECORD(uei, ei);
+}
+
+SCX_OPS_DEFINE(central_ops,
+ /*
+ * We are offloading all scheduling decisions to the central CPU
+ * and thus being the last task on a given CPU doesn't mean
+ * anything special. Enqueue the last tasks like any other tasks.
+ */
+ .flags = SCX_OPS_ENQ_LAST,
+
+ .select_cpu = (void *)central_select_cpu,
+ .enqueue = (void *)central_enqueue,
+ .dispatch = (void *)central_dispatch,
+ .init = (void *)central_init,
+ .exit = (void *)central_exit,
+ .name = "central");
diff --git a/tools/sched_ext/scx_central.c b/tools/sched_ext/scx_central.c
new file mode 100644
index 000000000000..02cd983a5287
--- /dev/null
+++ b/tools/sched_ext/scx_central.c
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
+ * Copyright (c) 2022 Tejun Heo <tj@kernel.org>
+ * Copyright (c) 2022 David Vernet <dvernet@meta.com>
+ */
+#define _GNU_SOURCE
+#include <sched.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <libgen.h>
+#include <bpf/bpf.h>
+#include <scx/common.h>
+#include "scx_central.bpf.skel.h"
+
+const char help_fmt[] =
+"A central FIFO sched_ext scheduler.\n"
+"\n"
+"See the top-level comment in .bpf.c for more details.\n"
+"\n"
+"Usage: %s [-s SLICE_US] [-c CPU]\n"
+"\n"
+" -s SLICE_US Override slice duration\n"
+" -c CPU Override the central CPU (default: 0)\n"
+" -v Print libbpf debug messages\n"
+" -h Display this help and exit\n";
+
+static bool verbose;
+static volatile int exit_req;
+
+static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
+{
+ if (level == LIBBPF_DEBUG && !verbose)
+ return 0;
+ return vfprintf(stderr, format, args);
+}
+
+static void sigint_handler(int dummy)
+{
+ exit_req = 1;
+}
+
+int main(int argc, char **argv)
+{
+ struct scx_central *skel;
+ struct bpf_link *link;
+ __u64 seq = 0;
+ __s32 opt;
+
+ libbpf_set_print(libbpf_print_fn);
+ signal(SIGINT, sigint_handler);
+ signal(SIGTERM, sigint_handler);
+
+ skel = SCX_OPS_OPEN(central_ops, scx_central);
+
+ skel->rodata->central_cpu = 0;
+ skel->rodata->nr_cpu_ids = libbpf_num_possible_cpus();
+
+ while ((opt = getopt(argc, argv, "s:c:pvh")) != -1) {
+ switch (opt) {
+ case 's':
+ skel->rodata->slice_ns = strtoull(optarg, NULL, 0) * 1000;
+ break;
+ case 'c':
+ skel->rodata->central_cpu = strtoul(optarg, NULL, 0);
+ break;
+ case 'v':
+ verbose = true;
+ break;
+ default:
+ fprintf(stderr, help_fmt, basename(argv[0]));
+ return opt != 'h';
+ }
+ }
+
+ /* Resize arrays so their element count is equal to cpu count. */
+ RESIZE_ARRAY(data, cpu_gimme_task, skel->rodata->nr_cpu_ids);
+
+ SCX_OPS_LOAD(skel, central_ops, scx_central, uei);
+ link = SCX_OPS_ATTACH(skel, central_ops);
+
+ while (!exit_req && !UEI_EXITED(skel, uei)) {
+ printf("[SEQ %llu]\n", seq++);
+ printf("total :%10" PRIu64 " local:%10" PRIu64 " queued:%10" PRIu64 " lost:%10" PRIu64 "\n",
+ skel->bss->nr_total,
+ skel->bss->nr_locals,
+ skel->bss->nr_queued,
+ skel->bss->nr_lost_pids);
+ printf(" dispatch:%10" PRIu64 " mismatch:%10" PRIu64 " retry:%10" PRIu64 "\n",
+ skel->bss->nr_dispatches,
+ skel->bss->nr_mismatches,
+ skel->bss->nr_retries);
+ printf("overflow:%10" PRIu64 "\n",
+ skel->bss->nr_overflows);
+ fflush(stdout);
+ sleep(1);
+ }
+
+ bpf_link__destroy(link);
+ UEI_REPORT(skel, uei);
+ scx_central__destroy(skel);
+ return 0;
+}
--
2.44.0
next prev parent reply other threads:[~2024-05-01 15:14 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-01 15:09 [PATCHSET v6] sched: Implement BPF extensible scheduler class Tejun Heo
2024-05-01 15:09 ` [PATCH 01/39] cgroup: Implement cgroup_show_cftypes() Tejun Heo
2024-05-01 15:09 ` [PATCH 02/39] sched: Restructure sched_class order sanity checks in sched_init() Tejun Heo
2024-05-01 15:09 ` [PATCH 03/39] sched: Allow sched_cgroup_fork() to fail and introduce sched_cancel_fork() Tejun Heo
2024-05-01 15:09 ` [PATCH 04/39] sched: Add sched_class->reweight_task() Tejun Heo
2024-06-24 10:23 ` Peter Zijlstra
2024-06-24 10:31 ` Peter Zijlstra
2024-06-24 23:59 ` Tejun Heo
2024-06-25 7:29 ` Peter Zijlstra
2024-06-25 23:57 ` Tejun Heo
2024-06-26 1:29 ` [PATCH sched/urgent] sched/fair: set_load_weight() must also call reweight_task() for SCHED_IDLE tasks Tejun Heo
2024-06-26 2:19 ` [PATCH sched_ext/for-6.11] sched_ext: Account for idle policy when setting p->scx.weight in scx_ops_enable_task() Tejun Heo
2024-05-01 15:09 ` [PATCH 05/39] sched: Add sched_class->switching_to() and expose check_class_changing/changed() Tejun Heo
2024-06-24 11:06 ` Peter Zijlstra
2024-06-24 22:18 ` Tejun Heo
2024-06-25 8:16 ` Peter Zijlstra
2024-05-01 15:09 ` [PATCH 06/39] sched: Factor out cgroup weight conversion functions Tejun Heo
2024-05-01 15:09 ` [PATCH 07/39] sched: Expose css_tg() and __setscheduler_prio() Tejun Heo
2024-06-24 11:19 ` Peter Zijlstra
2024-06-24 18:56 ` Tejun Heo
2024-05-01 15:09 ` [PATCH 08/39] sched: Enumerate CPU cgroup file types Tejun Heo
2024-05-01 15:09 ` [PATCH 09/39] sched: Add @reason to sched_class->rq_{on|off}line() Tejun Heo
2024-06-24 11:32 ` Peter Zijlstra
2024-06-24 21:18 ` Tejun Heo
2024-06-25 8:29 ` Peter Zijlstra
2024-06-25 23:41 ` Tejun Heo
2024-06-26 8:23 ` Peter Zijlstra
2024-06-26 18:01 ` Tejun Heo
2024-06-27 1:27 ` [PATCH sched_ext/for-6.11] sched_ext: Disallow loading BPF scheduler if isolcpus= domain isolation is in effect Tejun Heo
2024-05-01 15:09 ` [PATCH 10/39] sched: Factor out update_other_load_avgs() from __update_blocked_others() Tejun Heo
2024-06-24 12:35 ` Peter Zijlstra
2024-06-24 16:15 ` Vincent Guittot
2024-06-24 19:24 ` Tejun Heo
2024-06-25 9:13 ` Vincent Guittot
2024-06-26 20:49 ` Tejun Heo
2024-05-01 15:09 ` [PATCH 11/39] cpufreq_schedutil: Refactor sugov_cpu_is_busy() Tejun Heo
2024-05-01 15:09 ` [PATCH 12/39] sched: Add normal_policy() Tejun Heo
2024-05-01 15:09 ` [PATCH 13/39] sched_ext: Add boilerplate for extensible scheduler class Tejun Heo
2024-05-01 15:09 ` [PATCH 14/39] sched_ext: Implement BPF " Tejun Heo
2024-05-01 15:09 ` [PATCH 15/39] sched_ext: Add scx_simple and scx_example_qmap example schedulers Tejun Heo
2024-05-01 15:09 ` [PATCH 16/39] sched_ext: Add sysrq-S which disables the BPF scheduler Tejun Heo
2024-05-01 15:09 ` [PATCH 17/39] sched_ext: Implement runnable task stall watchdog Tejun Heo
2024-05-01 15:09 ` [PATCH 18/39] sched_ext: Allow BPF schedulers to disallow specific tasks from joining SCHED_EXT Tejun Heo
2024-06-24 12:40 ` Peter Zijlstra
2024-06-24 19:06 ` Tejun Heo
2024-05-01 15:09 ` [PATCH 19/39] sched_ext: Print sched_ext info when dumping stack Tejun Heo
2024-06-24 12:46 ` Peter Zijlstra
2024-06-24 14:25 ` Linus Torvalds
2024-06-24 18:34 ` Tejun Heo
2024-05-01 15:09 ` [PATCH 20/39] sched_ext: Print debug dump after an error exit Tejun Heo
2024-05-01 15:09 ` [PATCH 21/39] tools/sched_ext: Add scx_show_state.py Tejun Heo
2024-05-01 15:09 ` [PATCH 22/39] sched_ext: Implement scx_bpf_kick_cpu() and task preemption support Tejun Heo
2024-05-01 15:09 ` Tejun Heo [this message]
2024-05-01 15:09 ` [PATCH 24/39] sched_ext: Make watchdog handle ops.dispatch() looping stall Tejun Heo
2024-05-01 15:10 ` [PATCH 25/39] sched_ext: Add task state tracking operations Tejun Heo
2024-05-01 15:10 ` [PATCH 26/39] sched_ext: Implement tickless support Tejun Heo
2024-05-01 15:10 ` [PATCH 27/39] sched_ext: Track tasks that are subjects of the in-flight SCX operation Tejun Heo
2024-05-01 15:10 ` [PATCH 28/39] sched_ext: Add cgroup support Tejun Heo
2024-05-01 15:10 ` [PATCH 29/39] sched_ext: Add a cgroup scheduler which uses flattened hierarchy Tejun Heo
2024-05-01 15:10 ` [PATCH 30/39] sched_ext: Implement SCX_KICK_WAIT Tejun Heo
2024-05-01 15:10 ` [PATCH 31/39] sched_ext: Implement sched_ext_ops.cpu_acquire/release() Tejun Heo
2024-05-01 15:10 ` [PATCH 32/39] sched_ext: Implement sched_ext_ops.cpu_online/offline() Tejun Heo
2024-05-01 15:10 ` [PATCH 33/39] sched_ext: Bypass BPF scheduler while PM events are in progress Tejun Heo
2024-05-01 15:10 ` [PATCH 34/39] sched_ext: Implement core-sched support Tejun Heo
2024-05-01 15:10 ` [PATCH 35/39] sched_ext: Add vtime-ordered priority queue to dispatch_q's Tejun Heo
2024-05-01 15:10 ` [PATCH 36/39] sched_ext: Implement DSQ iterator Tejun Heo
2024-05-01 15:10 ` [PATCH 37/39] sched_ext: Add cpuperf support Tejun Heo
2024-05-01 15:10 ` [PATCH 38/39] sched_ext: Documentation: scheduler: Document extensible scheduler class Tejun Heo
2024-05-02 2:24 ` Bagas Sanjaya
2024-05-01 15:10 ` [PATCH 39/39] sched_ext: Add selftests Tejun Heo
2024-05-02 8:48 ` [PATCHSET v6] sched: Implement BPF extensible scheduler class Peter Zijlstra
2024-05-02 19:20 ` Tejun Heo
2024-05-03 8:52 ` Peter Zijlstra
2024-05-05 23:31 ` Tejun Heo
2024-05-13 8:03 ` Peter Zijlstra
2024-05-13 18:26 ` Steven Rostedt
2024-05-14 0:07 ` Qais Yousef
2024-05-14 21:34 ` David Vernet
2024-05-27 21:25 ` Qais Yousef
2024-05-28 23:46 ` Tejun Heo
2024-05-29 22:09 ` Qais Yousef
2024-05-17 9:58 ` Peter Zijlstra
2024-05-27 20:29 ` Qais Yousef
2024-05-14 20:22 ` Chris Mason
2024-05-14 22:06 ` Josh Don
2024-05-15 20:41 ` Tejun Heo
2024-05-21 0:19 ` Tejun Heo
2024-05-30 16:49 ` Tejun Heo
2024-05-06 18:47 ` Rik van Riel
2024-05-07 19:33 ` Tejun Heo
2024-05-07 19:47 ` Rik van Riel
2024-05-09 7:38 ` Changwoo Min
2024-05-10 18:24 ` Peter Jung
2024-05-13 20:36 ` Andrea Righi
2024-06-11 21:34 ` Linus Torvalds
2024-06-13 23:38 ` Tejun Heo
2024-06-19 20:56 ` Thomas Gleixner
2024-06-19 22:10 ` Linus Torvalds
2024-06-19 22:27 ` Thomas Gleixner
2024-06-19 22:55 ` Linus Torvalds
2024-06-20 2:35 ` Thomas Gleixner
2024-06-20 5:07 ` Linus Torvalds
2024-06-20 17:11 ` Linus Torvalds
2024-06-20 17:41 ` Tejun Heo
2024-06-20 22:15 ` [PATCH sched_ext/for-6.11] sched, sched_ext: Replace scx_next_task_picked() with sched_class->switch_class() Tejun Heo
2024-06-20 22:42 ` Linus Torvalds
2024-06-21 19:46 ` Tejun Heo
2024-06-24 9:04 ` Peter Zijlstra
2024-06-24 18:41 ` Tejun Heo
2024-06-24 9:02 ` Peter Zijlstra
2024-06-21 19:52 ` Tejun Heo
2024-06-24 8:59 ` Peter Zijlstra
2024-06-24 21:01 ` Tejun Heo
2024-06-25 7:49 ` Peter Zijlstra
2024-06-25 23:30 ` Tejun Heo
2024-06-26 8:28 ` Peter Zijlstra
2024-06-26 17:56 ` Tejun Heo
2024-06-20 18:47 ` [PATCHSET v6] sched: Implement BPF extensible scheduler class Thomas Gleixner
2024-06-20 19:20 ` Linus Torvalds
2024-06-21 9:35 ` Thomas Gleixner
2024-06-21 16:34 ` Linus Torvalds
2024-06-23 2:00 ` Tejun Heo
2024-06-23 10:31 ` Thomas Gleixner
2024-06-23 10:33 ` Thomas Gleixner
2024-06-24 14:23 ` Jason Gunthorpe
2024-06-20 19:58 ` Tejun Heo
2024-06-24 9:34 ` Peter Zijlstra
2024-06-24 20:17 ` Tejun Heo
2024-06-24 20:51 ` [PATCH sched_ext/for-6.11] sched, sched_ext: Simplify dl_prio() case handling in sched_fork() Tejun Heo
2024-06-20 19:35 ` [PATCHSET v6] sched: Implement BPF extensible scheduler class Tejun Heo
2024-06-21 10:46 ` Thomas Gleixner
2024-06-21 21:14 ` Chris Mason
2024-06-23 8:14 ` Thomas Gleixner
2024-06-24 16:42 ` Chris Mason
2024-06-24 18:11 ` Tejun Heo
2024-06-24 22:01 ` Peter Oskolkov
2024-06-24 22:17 ` David Vernet
2024-06-24 21:54 ` Peter Oskolkov
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