| /Linux-v5.15/tools/testing/selftests/cgroup/ |
| D | test_freezer.c | 27 static int cg_check_frozen(const char *cgroup, bool frozen) in cg_check_frozen() argument
30 if (cg_read_strstr(cgroup, "cgroup.events", "frozen 1") != 0) { in cg_check_frozen()
31 debug("Cgroup %s isn't frozen\n", cgroup); in cg_check_frozen()
38 if (cg_read_strstr(cgroup, "cgroup.events", "frozen 0") != 0) { in cg_check_frozen()
39 debug("Cgroup %s is frozen\n", cgroup); in cg_check_frozen()
50 static int cg_freeze_nowait(const char *cgroup, bool freeze) in cg_freeze_nowait() argument
52 return cg_write(cgroup, "cgroup.freeze", freeze ? "1" : "0"); in cg_freeze_nowait()
59 static int cg_enter_and_wait_for_frozen(const char *cgroup, int pid, in cg_enter_and_wait_for_frozen() argument
65 fd = cg_prepare_for_wait(cgroup); in cg_enter_and_wait_for_frozen()
69 ret = cg_enter(cgroup, pid); in cg_enter_and_wait_for_frozen()
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| D | test_kill.c | 21 static int cg_kill_wait(const char *cgroup) in cg_kill_wait() argument
25 fd = cg_prepare_for_wait(cgroup); in cg_kill_wait()
29 ret = cg_write(cgroup, "cgroup.kill", "1"); in cg_kill_wait()
46 static int child_fn(const char *cgroup, void *arg) in child_fn() argument
60 char *cgroup = NULL; in test_cgkill_simple() local
63 cgroup = cg_name(root, "cg_test_simple"); in test_cgkill_simple()
64 if (!cgroup) in test_cgkill_simple()
67 if (cg_create(cgroup)) in test_cgkill_simple()
71 pids[i] = cg_run_nowait(cgroup, child_fn, NULL); in test_cgkill_simple()
73 if (cg_wait_for_proc_count(cgroup, 100)) in test_cgkill_simple()
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| D | cgroup_util.h | 22 extern char *cg_control(const char *cgroup, const char *control);
23 extern int cg_create(const char *cgroup);
24 extern int cg_destroy(const char *cgroup);
25 extern int cg_read(const char *cgroup, const char *control,
27 extern int cg_read_strcmp(const char *cgroup, const char *control,
29 extern int cg_read_strstr(const char *cgroup, const char *control,
31 extern long cg_read_long(const char *cgroup, const char *control);
32 long cg_read_key_long(const char *cgroup, const char *control, const char *key);
33 extern long cg_read_lc(const char *cgroup, const char *control);
34 extern int cg_write(const char *cgroup, const char *control, char *buf);
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| D | cgroup_util.c | 80 char *cg_control(const char *cgroup, const char *control) in cg_control() argument
82 size_t len = strlen(cgroup) + strlen(control) + 2; in cg_control()
85 snprintf(ret, len, "%s/%s", cgroup, control); in cg_control()
90 int cg_read(const char *cgroup, const char *control, char *buf, size_t len) in cg_read() argument
94 snprintf(path, sizeof(path), "%s/%s", cgroup, control); in cg_read()
102 int cg_read_strcmp(const char *cgroup, const char *control, in cg_read_strcmp() argument
119 if (cg_read(cgroup, control, buf, size)) { in cg_read_strcmp()
129 int cg_read_strstr(const char *cgroup, const char *control, const char *needle) in cg_read_strstr() argument
133 if (cg_read(cgroup, control, buf, sizeof(buf))) in cg_read_strstr()
139 long cg_read_long(const char *cgroup, const char *control) in cg_read_long() argument
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| /Linux-v5.15/tools/perf/util/ |
| D | cgroup.c | 51 int read_cgroup_id(struct cgroup *cgrp) in read_cgroup_id()
93 static struct cgroup *evlist__find_cgroup(struct evlist *evlist, const char *str) in evlist__find_cgroup()
109 static struct cgroup *cgroup__new(const char *name, bool do_open) in cgroup__new()
111 struct cgroup *cgroup = zalloc(sizeof(*cgroup)); in cgroup__new() local
113 if (cgroup != NULL) { in cgroup__new()
114 refcount_set(&cgroup->refcnt, 1); in cgroup__new()
116 cgroup->name = strdup(name); in cgroup__new()
117 if (!cgroup->name) in cgroup__new()
121 cgroup->fd = open_cgroup(name); in cgroup__new()
122 if (cgroup->fd == -1) in cgroup__new()
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| D | cgroup.h | 12 struct cgroup { struct
23 struct cgroup *cgroup__get(struct cgroup *cgroup); argument
24 void cgroup__put(struct cgroup *cgroup);
29 struct cgroup *evlist__findnew_cgroup(struct evlist *evlist, const char *name);
33 void evlist__set_default_cgroup(struct evlist *evlist, struct cgroup *cgroup);
37 struct cgroup *cgroup__findnew(struct perf_env *env, uint64_t id,
39 struct cgroup *cgroup__find(struct perf_env *env, uint64_t id);
44 int read_cgroup_id(struct cgroup *cgrp);
46 static inline int read_cgroup_id(struct cgroup *cgrp __maybe_unused) in read_cgroup_id()
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| /Linux-v5.15/include/linux/ |
| D | cgroup.h | 100 struct cgroup_subsys_state *cgroup_e_css(struct cgroup *cgroup,
102 struct cgroup_subsys_state *cgroup_get_e_css(struct cgroup *cgroup,
107 struct cgroup *cgroup_get_from_path(const char *path);
108 struct cgroup *cgroup_get_from_fd(int fd);
111 int cgroup_transfer_tasks(struct cgroup *to, struct cgroup *from);
310 static inline u64 cgroup_id(const struct cgroup *cgrp) in cgroup_id()
420 static inline void cgroup_get(struct cgroup *cgrp) in cgroup_get()
425 static inline bool cgroup_tryget(struct cgroup *cgrp) in cgroup_tryget()
430 static inline void cgroup_put(struct cgroup *cgrp) in cgroup_put()
542 static inline struct cgroup *task_cgroup(struct task_struct *task, in task_cgroup()
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| D | cgroup-defs.h | 27 struct cgroup;
144 struct cgroup *cgroup; member
219 struct cgroup *dfl_cgrp;
277 struct cgroup *mg_src_cgrp;
278 struct cgroup *mg_dst_cgrp;
337 struct cgroup *updated_children; /* terminated by self cgroup */
338 struct cgroup *updated_next; /* NULL iff not on the list */
360 struct cgroup { struct
452 struct cgroup *dom_cgrp; argument
453 struct cgroup *old_dom_cgrp; /* used while enabling threaded */ argument
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| /Linux-v5.15/tools/bpf/bpftool/Documentation/ |
| D | bpftool-cgroup.rst | 2 bpftool-cgroup
13 **bpftool** [*OPTIONS*] **cgroup** *COMMAND*
24 | **bpftool** **cgroup** { **show** | **list** } *CGROUP* [**effective**]
25 | **bpftool** **cgroup tree** [*CGROUP_ROOT*] [**effective**]
26 | **bpftool** **cgroup attach** *CGROUP* *ATTACH_TYPE* *PROG* [*ATTACH_FLAGS*]
27 | **bpftool** **cgroup detach** *CGROUP* *ATTACH_TYPE* *PROG*
28 | **bpftool** **cgroup help**
40 **bpftool cgroup { show | list }** *CGROUP* [**effective**]
41 List all programs attached to the cgroup *CGROUP*.
47 will execute for events within a cgroup. This includes
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| /Linux-v5.15/Documentation/admin-guide/cgroup-v1/ |
| D | cgroups.rst | 6 Documentation/admin-guide/cgroup-v1/cpusets.rst
50 A *cgroup* associates a set of tasks with a set of parameters for one
56 schedules a resource or applies per-cgroup limits, but it may be
63 state attached to each cgroup in the hierarchy. Each hierarchy has
64 an instance of the cgroup virtual filesystem associated with it.
70 instance of the cgroup virtual file system, specify and query to
71 which cgroup a task is assigned, and list the task PIDs assigned to
72 a cgroup. Those creations and assignments only affect the hierarchy
73 associated with that instance of the cgroup file system.
77 cgroup support to provide new attributes for cgroups, such as
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| D | pids.rst | 8 The process number controller is used to allow a cgroup hierarchy to stop any
13 preventable in the scope of a cgroup hierarchy by allowing resource limiting of
14 the number of tasks in a cgroup.
20 pids.max (this is not available in the root cgroup for obvious reasons). The
21 number of processes currently in the cgroup is given by pids.current.
23 Organisational operations are not blocked by cgroup policies, so it is possible
25 be smaller than pids.current, or attaching enough processes to the cgroup such
26 that pids.current > pids.max. However, it is not possible to violate a cgroup
28 creation of a new process would cause a cgroup policy to be violated.
30 To set a cgroup to have no limit, set pids.max to "max". This is the default for
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| D | freezer-subsystem.rst | 5 The cgroup freezer is useful to batch job management system which start
9 whole. The cgroup freezer uses cgroups to describe the set of tasks to
13 The cgroup freezer will also be useful for checkpointing running groups
15 image of the tasks by attempting to force the tasks in a cgroup into a
51 In contrast, the cgroup freezer uses the kernel freezer code to
56 The cgroup freezer is hierarchical. Freezing a cgroup freezes all
57 tasks belonging to the cgroup and all its descendant cgroups. Each
58 cgroup has its own state (self-state) and the state inherited from the
59 parent (parent-state). Iff both states are THAWED, the cgroup is
62 The following cgroupfs files are created by cgroup freezer.
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| D | rdma.rst | 23 cgroup.
30 in other cgroup or kernel space ULPs may not even get chance to allocate any
40 RDMA cgroup allows limit configuration of resources. Rdma cgroup maintains
41 resource accounting per cgroup, per device using resource pool structure.
43 by rdma cgroup, which can be extended later if required.
45 This resource pool object is linked to the cgroup css. Typically there
46 are 0 to 4 resource pool instances per cgroup, per device in most use cases.
48 single cgroup may not be handled optimally, however there is no
53 always owned by the creator cgroup css. This allows process migration from one
54 to other cgroup without major complexity of transferring resource ownership;
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| D | net_cls.rst | 2 Network classifier cgroup
5 The Network classifier cgroup provides an interface to
23 mkdir /sys/fs/cgroup/net_cls
24 mount -t cgroup -onet_cls net_cls /sys/fs/cgroup/net_cls
25 mkdir /sys/fs/cgroup/net_cls/0
26 echo 0x100001 > /sys/fs/cgroup/net_cls/0/net_cls.classid
30 cat /sys/fs/cgroup/net_cls/0/net_cls.classid
40 tc filter add dev eth0 parent 10: protocol ip prio 10 handle 1: cgroup
44 iptables -A OUTPUT -m cgroup ! --cgroup 0x100001 -j DROP
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| D | cpuacct.rst | 12 Accounting groups can be created by first mounting the cgroup filesystem::
14 # mount -t cgroup -ocpuacct none /sys/fs/cgroup
17 visible at /sys/fs/cgroup. At bootup, this group includes all the tasks in
18 the system. /sys/fs/cgroup/tasks lists the tasks in this cgroup.
19 /sys/fs/cgroup/cpuacct.usage gives the CPU time (in nanoseconds) obtained
23 New accounting groups can be created under the parent group /sys/fs/cgroup::
25 # cd /sys/fs/cgroup
32 /sys/fs/cgroup/cpuacct.usage also.
35 CPU time obtained by the cgroup into user and system times. Currently
38 user: Time spent by tasks of the cgroup in user mode.
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| D | memcg_test.rst | 13 (*) Topics on API should be in Documentation/admin-guide/cgroup-v1/memory.rst)
168 mount -t cgroup -o cpuset none /opt/cpuset
218 mkdir /opt/cgroup/01/child_a
219 mkdir /opt/cgroup/01/child_b
227 /opt/cgroup/01/child_a/child_aa
228 /opt/cgroup/01/child_b/child_bb
229 /opt/cgroup/01/child_c
237 race and lock dependency with other cgroup subsystems.
241 # mount -t cgroup none /cgroup -o cpuset,memory,cpu,devices
256 # mount -t cgroup none /cgroup -o memory
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| D | net_prio.rst | 2 Network priority cgroup
5 The Network priority cgroup provides an interface to allow an administrator to
16 This cgroup allows an administrator to assign a process to a group which defines
18 be created by first mounting the cgroup filesystem::
20 # mount -t cgroup -onet_prio none /sys/fs/cgroup/net_prio
23 becomes visible at '/sys/fs/cgroup/net_prio'. This group includes all tasks in
24 the system. '/sys/fs/cgroup/net_prio/tasks' lists the tasks in this cgroup.
26 Each net_prio cgroup contains two files that are subsystem specific
31 cgroup.
43 iscsi net_prio cgroup and egressing on interface eth0 to have the priority of
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| /Linux-v5.15/include/trace/events/ |
| D | cgroup.h | 3 #define TRACE_SYSTEM cgroup
54 DECLARE_EVENT_CLASS(cgroup,
56 TP_PROTO(struct cgroup *cgrp, const char *path),
78 DEFINE_EVENT(cgroup, cgroup_mkdir,
80 TP_PROTO(struct cgroup *cgrp, const char *path),
85 DEFINE_EVENT(cgroup, cgroup_rmdir,
87 TP_PROTO(struct cgroup *cgrp, const char *path),
92 DEFINE_EVENT(cgroup, cgroup_release,
94 TP_PROTO(struct cgroup *cgrp, const char *path),
99 DEFINE_EVENT(cgroup, cgroup_rename,
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| /Linux-v5.15/kernel/cgroup/ |
| D | cgroup-internal.h | 78 struct cgroup *cgrp;
168 static inline bool cgroup_is_dead(const struct cgroup *cgrp) in cgroup_is_dead()
173 static inline bool notify_on_release(const struct cgroup *cgrp) in notify_on_release()
206 bool cgroup_on_dfl(const struct cgroup *cgrp);
207 bool cgroup_is_thread_root(struct cgroup *cgrp);
208 bool cgroup_is_threaded(struct cgroup *cgrp);
211 struct cgroup *task_cgroup_from_root(struct task_struct *task,
213 struct cgroup *cgroup_kn_lock_live(struct kernfs_node *kn, bool drain_offline);
215 int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,
224 int cgroup_migrate_vet_dst(struct cgroup *dst_cgrp);
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| D | rstat.c | 9 static void cgroup_base_stat_flush(struct cgroup *cgrp, int cpu);
11 static struct cgroup_rstat_cpu *cgroup_rstat_cpu(struct cgroup *cgrp, int cpu) in cgroup_rstat_cpu()
25 void cgroup_rstat_updated(struct cgroup *cgrp, int cpu) in cgroup_rstat_updated()
46 struct cgroup *parent = cgroup_parent(cgrp); in cgroup_rstat_updated()
87 static struct cgroup *cgroup_rstat_cpu_pop_updated(struct cgroup *pos, in cgroup_rstat_cpu_pop_updated()
88 struct cgroup *root, int cpu) in cgroup_rstat_cpu_pop_updated()
119 struct cgroup *parent = cgroup_parent(pos); in cgroup_rstat_cpu_pop_updated()
123 struct cgroup **nextp; in cgroup_rstat_cpu_pop_updated()
148 static void cgroup_rstat_flush_locked(struct cgroup *cgrp, bool may_sleep) in cgroup_rstat_flush_locked()
158 struct cgroup *pos = NULL; in cgroup_rstat_flush_locked()
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| D | cgroup.c | 236 static int cgroup_apply_control(struct cgroup *cgrp);
237 static void cgroup_finalize_control(struct cgroup *cgrp, int ret);
240 static int cgroup_destroy_locked(struct cgroup *cgrp);
241 static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
246 struct cgroup *cgrp, struct cftype cfts[],
312 bool cgroup_on_dfl(const struct cgroup *cgrp) in cgroup_on_dfl()
348 static bool cgroup_has_tasks(struct cgroup *cgrp) in cgroup_has_tasks()
353 bool cgroup_is_threaded(struct cgroup *cgrp) in cgroup_is_threaded()
359 static bool cgroup_is_mixable(struct cgroup *cgrp) in cgroup_is_mixable()
370 static bool cgroup_can_be_thread_root(struct cgroup *cgrp) in cgroup_can_be_thread_root()
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| D | freezer.c | 14 static void cgroup_propagate_frozen(struct cgroup *cgrp, bool frozen) in cgroup_propagate_frozen()
52 void cgroup_update_frozen(struct cgroup *cgrp) in cgroup_update_frozen()
89 static void cgroup_inc_frozen_cnt(struct cgroup *cgrp) in cgroup_inc_frozen_cnt()
97 static void cgroup_dec_frozen_cnt(struct cgroup *cgrp) in cgroup_dec_frozen_cnt()
109 struct cgroup *cgrp; in cgroup_enter_frozen()
133 struct cgroup *cgrp; in cgroup_leave_frozen()
177 static void cgroup_do_freeze(struct cgroup *cgrp, bool freeze) in cgroup_do_freeze()
223 struct cgroup *src, struct cgroup *dst) in cgroup_freezer_migrate_task()
260 void cgroup_freeze(struct cgroup *cgrp, bool freeze) in cgroup_freeze()
263 struct cgroup *dsct; in cgroup_freeze()
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| /Linux-v5.15/Documentation/admin-guide/ |
| D | cgroup-v2.rst | 11 conventions of cgroup v2. It describes all userland-visible aspects
12 of cgroup including core and specific controller behaviors. All
14 v1 is available under :ref:`Documentation/admin-guide/cgroup-v1/index.rst <cgroup-v1>`.
20 1-2. What is cgroup?
70 5.9-1 Miscellaneous cgroup Interface Files
75 5-N-1. CPU controller root cgroup process behaviour
76 5-N-2. IO controller root cgroup process behaviour
100 "cgroup" stands for "control group" and is never capitalized. The
102 qualifier as in "cgroup controllers". When explicitly referring to
106 What is cgroup?
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| /Linux-v5.15/tools/testing/selftests/vm/ |
| D | charge_reserved_hugetlb.sh | 27 cgroup_path=/dev/cgroup/memory
33 mount -t cgroup memory,hugetlb $cgroup_path
38 echo "+hugetlb" >/dev/cgroup/memory/cgroup.subtree_control
43 echo $$ >$cgroup_path/cgroup.procs
94 echo writing cgroup limit: "$cgroup_limit"
110 local cgroup="$1"
111 local path="/dev/cgroup/memory/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
121 local cgroup="$1"
124 local path="/dev/cgroup/memory/$cgroup/hugetlb.${MB}MB.$reservation_usage_file"
134 local cgroup="$1"
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| /Linux-v5.15/Documentation/accounting/ |
| D | cgroupstats.rst | 6 https://lore.kernel.org/r/461CF883.2030308@sw.ru and implements per cgroup statistics as
9 Per cgroup statistics infrastructure re-uses code from the taskstats
10 interface. A new set of cgroup operations are registered with commands
12 extend per cgroup statistics, by adding members to the cgroupstats
17 user space requests for statistics by passing the cgroup path.
18 Statistics about the state of all the tasks in the cgroup is returned to
25 To extract cgroup statistics a utility very similar to getdelays.c
28 ~/balbir/cgroupstats # ./getdelays -C "/sys/fs/cgroup/a"
30 ~/balbir/cgroupstats # ./getdelays -C "/sys/fs/cgroup"
|
