![]() | |||||||||||
Messages in this thread |
Srivatsa Vaddagiri wrote:
> Define these operations for a task-group:
>
> - create new group
> - destroy existing group
> - assign bandwidth (quota) for a group
> - get bandwidth (quota) of a group
>
>
> Signed-off-by : Srivatsa Vaddagiri <vatsa@in.ibm.com>
>
>
>
> include/linux/sched.h | 12 +++++++
> kernel/sched.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 91 insertions(+)
>
> diff -puN kernel/sched.c~cpu_ctlr_grp_ops kernel/sched.c
> --- linux-2.6.18-rc3/kernel/sched.c~cpu_ctlr_grp_ops 2006-08-04 07:58:50.000000000 +0530
> +++ linux-2.6.18-rc3-root/kernel/sched.c 2006-08-04 07:58:50.000000000 +0530
> @@ -7063,3 +7063,82 @@ void set_curr_task(int cpu, struct task_
> }
>
> #endif
> +
> +#ifdef CONFIG_CPUMETER
> +
> +/* Allocate runqueue structures for the new task-group */
> +void *sched_alloc_group(void)
> +{
> + struct task_grp *tg;
> + struct task_grp_rq *tgrq;
> + int i;
> +
> + tg = kzalloc(sizeof(*tg), GFP_KERNEL);
> + if (!tg)
> + return NULL;
> +
> + tg->ticks = -1; /* No limit */
> +
> + for_each_possible_cpu(i) {
> + tgrq = kzalloc(sizeof(*tgrq), GFP_KERNEL);
> + if (!tgrq)
> + goto oom;
> + tg->rq[i] = tgrq;
> + task_grp_rq_init(tgrq, tg->ticks);
> + }
> +
> + return (void *)tg;
unneeded cast
> +oom:
> + while (i--)
> + kfree(tg->rq[i]);
> +
> + kfree(tg);
> + return NULL;
> +}
> +
> +/* Deallocate runqueue structures */
> +void sched_dealloc_group(void *grp)
> +{
> + struct task_grp *tg = (struct task_grp *)grp;
again
> + int i;
> +
> + for_each_possible_cpu(i)
> + kfree(tg->rq[i]);
> +
> + kfree(tg);
> +}
> +
> +/* Assign quota to this group */
> +void sched_assign_quota(void *grp, int quota)
> +{
> + struct task_grp *tg = (struct task_grp *)grp;
and one more time
> + int i;
> +
> + tg->ticks = (quota * 5 * HZ) / 100;
> +
> + for_each_possible_cpu(i)
> + tg->rq[i]->ticks = tg->ticks;
> +
> +}
> +
> +/* Return assigned quota for this group */
> +int sched_get_quota(void *grp)
> +{
> + struct task_grp *tg = (struct task_grp *)grp;
...
> + int quota;
> +
> + quota = (tg->ticks * 100) / (5 * HZ);
> +
> + return quota;
what about to just
return (tg->ticks * 100) / (5 * HZ);
regards,
--
<a href="http://www.fi.muni.cz/~xslaby/">Jiri Slaby</a>
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8 22A0 32CC 55C3 39D4 7A7E
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
| ||||||||||
| Last update: 2006-08-05 01:13 [from the cache] ©2003-2008 | |||||||||||