Merge "msm_perf: perf data collection at 300ms interval" (7c03da54) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/soc/qcom/msm_performance.c

+129 −0

Original line number	Diff line number	Diff line
		@@ -25,7 +25,14 @@
		#include <linux/module.h>
		#include <linux/input.h>
		#include <linux/kthread.h>
		#include <linux/sched/core_ctl.h>

		/*
		* Sched will provide the data for every 20ms window,
		* will collect the data for 15 windows(300ms) and then update
		* sysfs nodes with aggregated data
		*/
		#define POLL_INT 15

		/* To handle cpufreq min/max request */
		struct cpu_status {
		@@ -42,6 +49,9 @@ struct events {
		static struct events events_group;
		static struct task_struct *events_notify_thread;

		static unsigned int aggr_big_nr;
		static unsigned int aggr_top_load;

		/*****************************sysfs start**********************************/
		static int set_cpu_min_freq(const char buf, const struct kernel_param kp)
		{
		@@ -206,7 +216,38 @@ static struct attribute_group events_attr_group = {
		.attrs = events_attrs,
		};

		static ssize_t show_big_nr(struct kobject *kobj,
		struct kobj_attribute attr, char buf)
		{
		return snprintf(buf, PAGE_SIZE, "%u\n", aggr_big_nr);
		}

		static struct kobj_attribute big_nr_attr =
		__ATTR(aggr_big_nr, 0444, show_big_nr, NULL);

		static ssize_t show_top_load(struct kobject *kobj,
		struct kobj_attribute attr, char buf)
		{
		return snprintf(buf, PAGE_SIZE, "%u\n", aggr_top_load);
		}

		static struct kobj_attribute top_load_attr =
		__ATTR(aggr_top_load, 0444, show_top_load, NULL);


		static struct attribute *notify_attrs[] = {
		&big_nr_attr.attr,
		&top_load_attr.attr,
		NULL,
		};

		static struct attribute_group notify_attr_group = {
		.attrs = notify_attrs,
		};
		static struct kobject *notify_kobj;

		/*****************************sysfs ends**********************************/

		static int perf_adjust_notify(struct notifier_block *nb, unsigned long val,
		void *data)
		{
		@@ -282,6 +323,32 @@ static int events_notify_userspace(void *data)
		return 0;
		}

		static int init_notify_group(void)
		{
		int ret;
		struct kobject *module_kobj;

		module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
		if (!module_kobj) {
		pr_err("msm_perf: Couldn't find module kobject\n");
		return -ENOENT;
		}

		notify_kobj = kobject_create_and_add("notify", module_kobj);
		if (!notify_kobj) {
		pr_err("msm_perf: Failed to add notify_kobj\n");
		return -ENOMEM;
		}

		ret = sysfs_create_group(notify_kobj, &notify_attr_group);
		if (ret) {
		kobject_put(notify_kobj);
		pr_err("msm_perf: Failed to create sysfs\n");
		return ret;
		}
		return 0;
		}

		static int init_events_group(void)
		{
		int ret;
		@@ -316,6 +383,67 @@ static int init_events_group(void)
		return 0;
		}

		static void nr_notify_userspace(struct work_struct *work)
		{
		sysfs_notify(notify_kobj, NULL, "aggr_top_load");
		sysfs_notify(notify_kobj, NULL, "aggr_big_nr");
		}

		static int msm_perf_core_ctl_notify(struct notifier_block *nb,
		unsigned long unused,
		void *data)
		{
		static unsigned int tld, nrb, i;
		static DECLARE_WORK(sysfs_notify_work, nr_notify_userspace);
		struct core_ctl_notif_data *d = data;


		nrb += d->nr_big;
		tld += d->coloc_load_pct;
		i++;
		if (i == POLL_INT) {
		aggr_big_nr = ((nrb%POLL_INT) ? 1 : 0) + nrb/POLL_INT;
		aggr_top_load = tld/POLL_INT;
		tld = 0;
		nrb = 0;
		i = 0;
		schedule_work(&sysfs_notify_work);
		}
		return NOTIFY_OK;
		}

		static struct notifier_block msm_perf_nb = {
		.notifier_call = msm_perf_core_ctl_notify
		};

		static bool core_ctl_register;
		static int set_core_ctl_register(const char buf, const struct kernel_param kp)
		{
		int ret;
		bool old_val = core_ctl_register;

		ret = param_set_bool(buf, kp);
		if (ret < 0)
		return ret;

		if (core_ctl_register == old_val)
		return 0;

		if (core_ctl_register)
		core_ctl_notifier_register(&msm_perf_nb);
		else
		core_ctl_notifier_unregister(&msm_perf_nb);

		return 0;
		}

		static const struct kernel_param_ops param_ops_cc_register = {
		.set = set_core_ctl_register,
		.get = param_get_bool,
		};
		module_param_cb(core_ctl_register, &param_ops_cc_register,
		&core_ctl_register, 0644);

		static int __init msm_performance_init(void)
		{
		unsigned int cpu;
		@@ -332,6 +460,7 @@ static int __init msm_performance_init(void)
		NULL);

		init_events_group();
		init_notify_group();

		return 0;
		}