110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 MediaTek Inc.
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*/
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#include <linux/spinlock.h>
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#include <linux/time.h>
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#include <mt-plat/perf_common.h>
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#include <perf_tracker.h>
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#include <linux/cpu.h>
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#include <linux/topology.h>
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#ifdef CONFIG_MTK_CORE_CTL
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#include <mt-plat/core_ctl.h>
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#endif
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static u64 checked_timestamp;
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static bool long_trace_check_flag;
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static DEFINE_SPINLOCK(check_lock);
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static int perf_common_init;
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#ifdef CONFIG_MTK_PERF_TRACKER
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int cluster_nr = -1;
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#endif
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static inline bool perf_do_check(u64 wallclock)
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{
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bool do_check = false;
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unsigned long flags;
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/* check interval */
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spin_lock_irqsave(&check_lock, flags);
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if ((s64)(wallclock - checked_timestamp)
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>= (s64)(2 * NSEC_PER_MSEC)) {
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checked_timestamp = wallclock;
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long_trace_check_flag = !long_trace_check_flag;
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do_check = true;
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}
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spin_unlock_irqrestore(&check_lock, flags);
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return do_check;
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}
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bool hit_long_check(void)
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{
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bool do_check = false;
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unsigned long flags;
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spin_lock_irqsave(&check_lock, flags);
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if (long_trace_check_flag)
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do_check = true;
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spin_unlock_irqrestore(&check_lock, flags);
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return do_check;
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}
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void perf_common(u64 wallclock)
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{
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long mm_available = -1, mm_free = -1;
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if (!perf_do_check(wallclock))
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return;
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#ifdef CONFIG_MTK_CORE_CTL
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/* period is 8ms */
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if (hit_long_check())
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core_ctl_tick(wallclock);
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#endif
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if (unlikely(!perf_common_init))
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return;
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perf_tracker(wallclock, mm_available, mm_free);
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}
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static struct attribute *perf_attrs[] = {
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#ifdef CONFIG_MTK_PERF_TRACKER
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&perf_tracker_enable_attr.attr,
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#endif
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NULL,
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};
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static struct attribute_group perf_attr_group = {
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.attrs = perf_attrs,
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};
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static int init_perf_common(void)
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{
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int ret = 0;
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struct kobject *kobj = NULL;
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perf_common_init = 1;
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#ifdef CONFIG_MTK_PERF_TRACKER
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cluster_nr = arch_nr_clusters();
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if (unlikely(cluster_nr <= 0 || cluster_nr > 3))
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cluster_nr = 3;
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#endif
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kobj = kobject_create_and_add("perf", &cpu_subsys.dev_root->kobj);
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if (kobj) {
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ret = sysfs_create_group(kobj, &perf_attr_group);
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if (ret)
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kobject_put(kobj);
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else
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kobject_uevent(kobj, KOBJ_ADD);
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}
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return 0;
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}
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late_initcall_sync(init_perf_common);
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