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- Throttle the inherited sleep and run time in sched_fork_kseg(). This

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allows us to learn the behavior of a thread much more quickly after it
   starts up.
This commit is contained in:
Jeff Roberson 2003-06-28 06:19:56 +00:00
parent d0dbe1950a
commit a91172ade1
1 changed files with 4 additions and 4 deletions
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8
sys/kern/sched_ule.c
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@ -146,12 +146,12 @@ struct td_sched *thread0_sched = &td_sched;
*
* SLP_RUN_MAX: Maximum amount of sleep time + run time we'll accumulate
* before throttling back.
* SLP_RUN_THROTTLE: Divisor for reducing slp/run time.
* SLP_RUN_THROTTLE: Divisor for reducing slp/run time at fork time.
* INTERACT_MAX: Maximum interactivity value. Smaller is better.
* INTERACT_THRESH: Threshhold for placement on the current runq.
*/
#define SCHED_SLP_RUN_MAX ((hz * 2) << 10)
#define SCHED_SLP_RUN_THROTTLE (2)
#define SCHED_SLP_RUN_THROTTLE (100)
#define SCHED_INTERACT_MAX (100)
#define SCHED_INTERACT_HALF (SCHED_INTERACT_MAX / 2)
#define SCHED_INTERACT_THRESH (20)
@ -891,8 +891,8 @@ sched_fork_ksegrp(struct ksegrp *kg, struct ksegrp *child)
PROC_LOCK_ASSERT(child->kg_proc, MA_OWNED);
/* XXX Need something better here */
child->kg_slptime = kg->kg_slptime;
child->kg_runtime = kg->kg_runtime;
child->kg_slptime = kg->kg_slptime / SCHED_SLP_RUN_THROTTLE;
child->kg_runtime = kg->kg_runtime / SCHED_SLP_RUN_THROTTLE;
kg->kg_runtime += tickincr << 10;
sched_interact_update(kg);