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/* 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);
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