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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/oom/oomd-manager.h | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/oom/oomd-manager.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/oom/oomd-manager.h b/src/oom/oomd-manager.h new file mode 100644 index 0000000..8f0dd41 --- /dev/null +++ b/src/oom/oomd-manager.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include "sd-bus.h" +#include "sd-event.h" + +#include "conf-parser.h" +#include "oomd-util.h" +#include "varlink.h" + +/* Polling interval for monitoring stats */ +#define SWAP_INTERVAL_USEC 150000 /* 0.15 seconds */ +/* Pressure counters are lagging (~2 seconds) compared to swap so polling too frequently just wastes CPU */ +#define MEM_PRESSURE_INTERVAL_USEC (1 * USEC_PER_SEC) + +/* Take action if 10s of memory pressure > 60 for more than 30s. We use the "full" value from PSI so this is the + * percentage of time all tasks were delayed (i.e. unproductive). + * Generally 60 or higher might be acceptable for something like system.slice with no memory.high set; processes in + * system.slice are assumed to be less latency sensitive. */ +#define DEFAULT_MEM_PRESSURE_DURATION_USEC (30 * USEC_PER_SEC) +#define DEFAULT_MEM_PRESSURE_LIMIT_PERCENT 60 +#define DEFAULT_SWAP_USED_LIMIT_PERCENT 90 + +/* Only tackle candidates with large swap usage. */ +#define THRESHOLD_SWAP_USED_PERCENT 5 + +#define RECLAIM_DURATION_USEC (30 * USEC_PER_SEC) +#define POST_ACTION_DELAY_USEC (15 * USEC_PER_SEC) + +typedef struct Manager Manager; + +struct Manager { + sd_bus *bus; + sd_event *event; + + Hashmap *polkit_registry; + + bool dry_run; + int swap_used_limit_permyriad; + loadavg_t default_mem_pressure_limit; + usec_t default_mem_pressure_duration_usec; + + /* k: cgroup paths -> v: OomdCGroupContext + * Used to detect when to take action. */ + Hashmap *monitored_swap_cgroup_contexts; + Hashmap *monitored_mem_pressure_cgroup_contexts; + Hashmap *monitored_mem_pressure_cgroup_contexts_candidates; + + OomdSystemContext system_context; + + usec_t mem_pressure_post_action_delay_start; + + sd_event_source *swap_context_event_source; + sd_event_source *mem_pressure_context_event_source; + + /* This varlink object is used to manage the subscription from systemd-oomd to PID1 which it uses to + * listen for changes in ManagedOOM settings (oomd client - systemd server). */ + Varlink *varlink_client; + /* This varlink server object is used to manage systemd-oomd's varlink server which is used by user + * managers to report changes in ManagedOOM settings (oomd server - systemd client). */ + VarlinkServer *varlink_server; +}; + +Manager* manager_free(Manager *m); +DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free); + +int manager_new(Manager **ret); + +int manager_start(Manager *m, bool dry_run, int swap_used_limit_permyriad, int mem_pressure_limit_permyriad, usec_t mem_pressure_usec, int fd); + +int manager_get_dump_string(Manager *m, char **ret); + +CONFIG_PARSER_PROTOTYPE(config_parse_oomd_default); |