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 <[email protected]>
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
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