hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7ZBSR CVE: NA
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Now, we can use /pro/pid/smart_grid_level to {read,set} task current qos level.
This allows to determine the scope of dynamic partitioning of the task in smart_grid.
SCHED_GRID_QOS_TASK_LEVEL was defined different QoS level. The lower number has the higher priority. (E.g. 0 was the highest).
Signed-off-by: Yipeng Zou zouyipeng@huawei.com --- fs/proc/base.c | 76 ++++++++++++++++++++++++++++++++++ include/linux/sched/grid_qos.h | 11 ++++- kernel/sched/grid/stat.c | 15 +++++++ 3 files changed, 101 insertions(+), 1 deletion(-)
diff --git a/fs/proc/base.c b/fs/proc/base.c index 2a4cc5c796c7..e9a5550fbbe2 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -93,6 +93,10 @@ #include <linux/sched/coredump.h> #include <linux/sched/debug.h> #include <linux/sched/stat.h> +#ifdef CONFIG_QOS_SCHED_SMART_GRID +#include <linux/sched/grid_qos.h> +#include <linux/sched.h> +#endif #include <linux/posix-timers.h> #include <linux/time_namespace.h> #include <linux/resctrl.h> @@ -3493,6 +3497,75 @@ static int proc_stack_depth(struct seq_file *m, struct pid_namespace *ns, } #endif /* CONFIG_STACKLEAK_METRICS */
+#ifdef CONFIG_QOS_SCHED_SMART_GRID +static int smart_grid_level_show(struct seq_file *m, void *v) +{ + struct inode *inode = m->private; + struct task_struct *p; + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + + if (p->grid_qos != NULL) + seq_printf(m, "%d\n", p->grid_qos->stat.class_lvl); + + put_task_struct(p); + + return 0; +} + +static int smart_grid_level_open(struct inode *inode, struct file *filp) +{ + return single_open(filp, smart_grid_level_show, inode); +} + +static ssize_t smart_grid_level_write(struct file *file, const char __user *buf, + size_t count, loff_t *offset) +{ + struct inode *inode = file_inode(file); + struct task_struct *p; + char buffer[TASK_COMM_LEN]; + const size_t maxlen = sizeof(buffer) - 1; + unsigned long long level = SCHED_GRID_QOS_TASK_LEVEL_MAX; + unsigned int len; + int ret = 0; + + memset(buffer, 0, sizeof(buffer)); + if (copy_from_user(buffer, buf, count > maxlen ? maxlen : count)) + return -EFAULT; + + p = get_proc_task(inode); + if (!p) + return -ESRCH; + + len = _parse_integer(buffer, 10, &level); + if (len & KSTRTOX_OVERFLOW || + level >= SCHED_GRID_QOS_TASK_LEVEL_MAX) { + put_task_struct(p); + return -EINVAL; + } + + if (p->grid_qos != NULL && + p->grid_qos->stat.set_class_lvl != NULL) + ret = p->grid_qos->stat.set_class_lvl(&p->grid_qos->stat, level); + + put_task_struct(p); + + if (ret) + return ret; + return count; +} + +static const struct file_operations proc_pid_sg_level_operations = { + .open = smart_grid_level_open, + .read = seq_read, + .write = smart_grid_level_write, + .llseek = seq_lseek, + .release = single_release, +}; +#endif + /* * Thread groups */ @@ -3516,6 +3589,9 @@ static const struct pid_entry tgid_base_stuff[] = { #ifdef CONFIG_SCHED_DEBUG REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations), #endif +#ifdef CONFIG_QOS_SCHED_SMART_GRID + REG("smart_grid_level", 0644, proc_pid_sg_level_operations), +#endif #ifdef CONFIG_SCHED_AUTOGROUP REG("autogroup", S_IRUGO|S_IWUSR, proc_pid_sched_autogroup_operations), #endif diff --git a/include/linux/sched/grid_qos.h b/include/linux/sched/grid_qos.h index 3bfb10d9f58a..924d358954c6 100644 --- a/include/linux/sched/grid_qos.h +++ b/include/linux/sched/grid_qos.h @@ -17,6 +17,15 @@ enum sched_grid_qos_class { SCHED_GRID_QOS_CLASS_LEVEL_NR };
+/* + SCHED_GRID_QOS_TASK_LEVEL was defined different QoS level. + The lower number has the higher priority. (E.g. 0 was the highest) + The enum sched_grid_qos_class defined the max level, the lowest level. + */ +#define SCHED_GRID_QOS_TASK_LEVEL_HIGHEST SCHED_GRID_QOS_CLASS_LEVEL_1 +#define SCHED_GRID_QOS_TASK_LEVEL_MAX (SCHED_GRID_QOS_CLASS_LEVEL_NR) +#define SCHED_GRID_QOS_TASK_LEVEL_DEFAULT (SCHED_GRID_QOS_CLASS_LEVEL_NR - 1) + enum { SCHED_GRID_QOS_IPS_INDEX = 0, SCHED_GRID_QOS_MEMBOUND_RATIO_INDEX = 1, @@ -50,7 +59,7 @@ struct sched_grid_qos_sample {
struct sched_grid_qos_stat { enum sched_grid_qos_class class_lvl; - int (*set_class_lvl)(struct sched_grid_qos_stat *qos_stat); + int (*set_class_lvl)(struct sched_grid_qos_stat *qos_stat, int level); struct sched_grid_qos_sample sample[SCHED_GRID_QOS_SAMPLE_NR]; };
diff --git a/kernel/sched/grid/stat.c b/kernel/sched/grid/stat.c index b40c75145608..68bbc060b811 100644 --- a/kernel/sched/grid/stat.c +++ b/kernel/sched/grid/stat.c @@ -19,8 +19,20 @@ #include <linux/sched/grid_qos.h> #include "internal.h"
+static int qos_stat_set_class_level(struct sched_grid_qos_stat *qos_stat, int level) +{ + if (qos_stat == NULL || level >= SCHED_GRID_QOS_TASK_LEVEL_MAX) + return -EINVAL; + + qos_stat->class_lvl = level; + return 0; +} + void qos_stat_init(struct sched_grid_qos_stat *stat) { + if (stat == NULL) + return; + stat->sample[SCHED_GRID_QOS_IPS_INDEX].name = "ips"; stat->sample[SCHED_GRID_QOS_IPS_INDEX].index = SCHED_GRID_QOS_IPS_INDEX; stat->sample[SCHED_GRID_QOS_MEMBOUND_RATIO_INDEX].name = "membound_ratio"; @@ -29,4 +41,7 @@ void qos_stat_init(struct sched_grid_qos_stat *stat) stat->sample[SCHED_GRID_QOS_MEMBANDWIDTH_INDEX].name = "memband_width"; stat->sample[SCHED_GRID_QOS_MEMBANDWIDTH_INDEX].index = SCHED_GRID_QOS_MEMBANDWIDTH_INDEX; + + stat->set_class_lvl = qos_stat_set_class_level; + stat->class_lvl = SCHED_GRID_QOS_TASK_LEVEL_DEFAULT; }