Messages in this thread Patch in this message | | | Date | Mon, 26 Sep 2005 18:34:12 +0900 | From | KUROSAWA Takahiro <> | Subject | [PATCH 3/3] CPUMETER: connect the CPU resource controller to CPUMETER |
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This patch puts the CPU resource controller into CPUMETER framework. With this patch, we can control the CPU resource from the cpuset filesystem.
Signed-off-by: KUROSAWA Takahiro <kurosawa@valinux.co.jp>
--- from-0003/init/Kconfig +++ to-work/init/Kconfig 2005-09-26 17:31:40.247109876 +0900 @@ -249,6 +249,7 @@ config CPUMETER config CPU_RC bool "CPU resource controller" + depends on CPUMETER help This options will let you control the CPU resource by scaling the timeslice allocated for each tasks. --- from-0003/kernel/cpu_rc.c +++ to-work/kernel/cpu_rc.c 2005-09-22 11:51:57.000000000 +0900 @@ -228,6 +228,124 @@ void cpu_rc_collect_hunger(task_t *tsk) tsk->last_activated = 0; } +/* + * interface functions for cpumeter + */ +static void *cpu_rc_create_rcdomain(struct cpuset *cs, + cpumask_t cpus, nodemask_t mems) +{ + struct cpu_rc_domain *rcd; + + if (cpus_empty(cpus)) { + return NULL; + } + + rcd = kmalloc(sizeof(*rcd), GFP_KERNEL); + if (rcd == NULL) { + return NULL; + } + + rcd->cpus = cpus; + spin_lock_init(&rcd->lock); + rcd->hungry_groups = 0; + + rcd->numcpus = cpus_weight(cpus); + + return rcd; +} + +static void cpu_rc_destroy_rcdomain(void *rcd) +{ + kfree(rcd); +} + +static void *cpu_rc_create(void *rcd, struct cpuset *cs) +{ + struct cpu_rc *cr; + + cr = kmalloc(sizeof(*cr), GFP_KERNEL); + if (cr == NULL) { + return NULL; + } + + memset(cr, 0, sizeof(*cr)); + cr->rcd = rcd; + cr->ts_factor = CPU_RC_TSFACTOR_MAX; + + return cr; +} + +static void cpu_rc_destroy(void *p) +{ + struct cpu_rc *cr = p; + + cpu_rc_lock(cr); + cpu_rc_set_satisfied(cr); + cpu_rc_unlock(cr); + + kfree(p); +} + +static int cpu_rc_set_guar(void *ctldata, unsigned long val) +{ + struct cpu_rc *cr = ctldata; + + if (cr == NULL) { + return -EINVAL; + } + + cpu_rc_lock(cr); + cr->guarantee = val; + cpu_rc_unlock(cr); + + return 0; +} + +static int cpu_rc_get_cur(void *ctldata, unsigned long *valp) +{ + struct cpu_rc *cr = ctldata; + unsigned int load; + int i, n; + + if (cr == NULL) { + return -EINVAL; + } + + load = 0; + n = 0; + + /* Just displaying the value, so no locking... */ + for_each_cpu_mask(i, cr->rcd->cpus) { + load += cr->stat[i].load; + n++; + } + + *valp = load / n * CPU_RC_GUAR_SCALE / CPU_RC_LOAD_SCALE; + + return 0; +} + +static struct cpumeter_ctlr cpu_rc_ctlr = { + .name = "cpu", + .create_rcdomain = cpu_rc_create_rcdomain, + .destroy_rcdomain = cpu_rc_destroy_rcdomain, + .create = cpu_rc_create, + .destroy = cpu_rc_destroy, + .set_lim = NULL, + .set_guar = cpu_rc_set_guar, + .get_cur = cpu_rc_get_cur, +}; + void cpu_rc_init(void) { + int err; + err = cpumeter_register_controller(&cpu_rc_ctlr); + if (err) { + printk(KERN_ERR "cpu_rc: register to cpumeter failed\n"); + } +} + +static struct cpu_rc *cpu_rc_get(task_t *tsk) +{ + return cpumeter_get_controller_data(tsk->cpuset, &cpu_rc_ctlr); } - 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/
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