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| author | Kristijan Gjoshev <crypter@mail.com> | 2020-02-01 18:27:08 +0100 |
|---|---|---|
| committer | Anita Zhang <the.anitazha@gmail.com> | 2020-11-05 10:59:33 -0800 |
| commit | acf24a1a84e9496e3feb09449f4cc43fe67a9a64 (patch) | |
| tree | 4f0ea72d0e2f6b20aea5c51c489574c63ec0ef81 /src/core/dbus-timer.c | |
| parent | 5cecbae158ed05b2376a605c9c9ef71eeef81472 (diff) | |
| download | systemd-acf24a1a84e9496e3feb09449f4cc43fe67a9a64.tar.gz | |
timer: add new feature FixedRandomDelay=
FixedRandomDelay=yes will use
`siphash24(sd_id128_get_machine() || MANAGER_IS_SYSTEM(m) || getuid() || u->id)`,
where || is concatenation, instead of a random number to choose a value between
0 and RandomizedDelaySec= as the timer delay.
This essentially sets up a fixed, but seemingly random, offset for each timer
iteration rather than having a random offset recalculated each time it fires.
Closes #10355
Co-author: Anita Zhang <the.anitazha@gmail.com>
Diffstat (limited to 'src/core/dbus-timer.c')
| -rw-r--r-- | src/core/dbus-timer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/core/dbus-timer.c b/src/core/dbus-timer.c index da35fa8678..ee54ba8772 100644 --- a/src/core/dbus-timer.c +++ b/src/core/dbus-timer.c @@ -131,6 +131,7 @@ const sd_bus_vtable bus_timer_vtable[] = { SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Timer, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("AccuracyUSec", "t", bus_property_get_usec, offsetof(Timer, accuracy_usec), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RandomizedDelayUSec", "t", bus_property_get_usec, offsetof(Timer, random_usec), SD_BUS_VTABLE_PROPERTY_CONST), + SD_BUS_PROPERTY("FixedRandomDelay", "b", bus_property_get_bool, offsetof(Timer, fixed_random_delay), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("Persistent", "b", bus_property_get_bool, offsetof(Timer, persistent), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("WakeSystem", "b", bus_property_get_bool, offsetof(Timer, wake_system), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RemainAfterElapse", "b", bus_property_get_bool, offsetof(Timer, remain_after_elapse), SD_BUS_VTABLE_PROPERTY_CONST), @@ -232,6 +233,9 @@ static int bus_timer_set_transient_property( if (streq(name, "RandomizedDelayUSec")) return bus_set_transient_usec(u, name, &t->random_usec, message, flags, error); + if (streq(name, "FixedRandomDelay")) + return bus_set_transient_bool(u, name, &t->fixed_random_delay, message, flags, error); + if (streq(name, "WakeSystem")) return bus_set_transient_bool(u, name, &t->wake_system, message, flags, error); |