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Chapter 5: Programming With TimeSys Linux/RT
Currently, TimeSys Linux/RT supports RSV_HARD
and RSV_SOFT.
- RSV_HARD: guaranteed to receive the specified
amount on success
- RSV_SOFT: guaranteed to receive the specified
amount on success. If resource is still available
after using up guaranteed amount, it will compete against unreserved tasks for more CPU
time.
Œ
cpu_reserve_ctl(rk_resource_set_t rs,
cpu_reserve_attr_t cpu_attr)
Changes the properties of existing CPU reservations (computation time, period, deadline, blocking time and enforcement mode.)
Œ
rk_cpu_reserve_delete(rk_resource_set_t rs);
Deletes the CPU reserve associated with a resource set.
Œ
rk_cpu_reserves_get_scheduling_policy(void);
Returns the scheduling policy used to schedule CPU reserves. The policy can either be RATE_MONOTONIC or
DEADLINE_MONOTONIC.
Œ
rk_cpu_reserves_set_scheduling_policy(int
icy);
pol-
Sets the scheduling policy used to schedule CPU reserves. The policy can either be RATE_MONOTONIC or
DEADLINE_MONOTONIC.
Œ
rk_cpu_reserves_get_num(void);
Returns the number of CPU reserves currently in the
system.
Œ
rk_cpu_reserves_get_list(rk_reserve_t
int count);
*rsv,
Returns the list of CPU reserves in the system.
Œ
rk_cpu_reserve_get_attr(rk_reserve_t
cpu_reserve_attr_t attr);
rsv,
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