From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/kernel/sched/cpuacct.c | 84 +++++++++++++++++-------------------------
1 files changed, 34 insertions(+), 50 deletions(-)
diff --git a/kernel/kernel/sched/cpuacct.c b/kernel/kernel/sched/cpuacct.c
index 941c28c..8ee2983 100644
--- a/kernel/kernel/sched/cpuacct.c
+++ b/kernel/kernel/sched/cpuacct.c
@@ -21,15 +21,11 @@
[CPUACCT_STAT_SYSTEM] = "system",
};
-struct cpuacct_usage {
- u64 usages[CPUACCT_STAT_NSTATS];
-};
-
/* track CPU usage of a group of tasks and its child groups */
struct cpuacct {
struct cgroup_subsys_state css;
/* cpuusage holds pointer to a u64-type object on every CPU */
- struct cpuacct_usage __percpu *cpuusage;
+ u64 __percpu *cpuusage;
struct kernel_cpustat __percpu *cpustat;
};
@@ -49,7 +45,7 @@
return css_ca(ca->css.parent);
}
-static DEFINE_PER_CPU(struct cpuacct_usage, root_cpuacct_cpuusage);
+static DEFINE_PER_CPU(u64, root_cpuacct_cpuusage);
static struct cpuacct root_cpuacct = {
.cpustat = &kernel_cpustat,
.cpuusage = &root_cpuacct_cpuusage,
@@ -68,7 +64,7 @@
if (!ca)
goto out;
- ca->cpuusage = alloc_percpu(struct cpuacct_usage);
+ ca->cpuusage = alloc_percpu(u64);
if (!ca->cpuusage)
goto out_free_ca;
@@ -99,7 +95,8 @@
static u64 cpuacct_cpuusage_read(struct cpuacct *ca, int cpu,
enum cpuacct_stat_index index)
{
- struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
+ u64 *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
+ u64 *cpustat = per_cpu_ptr(ca->cpustat, cpu)->cpustat;
u64 data;
/*
@@ -115,14 +112,17 @@
raw_spin_lock_irq(&cpu_rq(cpu)->lock);
#endif
- if (index == CPUACCT_STAT_NSTATS) {
- int i = 0;
-
- data = 0;
- for (i = 0; i < CPUACCT_STAT_NSTATS; i++)
- data += cpuusage->usages[i];
- } else {
- data = cpuusage->usages[index];
+ switch (index) {
+ case CPUACCT_STAT_USER:
+ data = cpustat[CPUTIME_USER] + cpustat[CPUTIME_NICE];
+ break;
+ case CPUACCT_STAT_SYSTEM:
+ data = cpustat[CPUTIME_SYSTEM] + cpustat[CPUTIME_IRQ] +
+ cpustat[CPUTIME_SOFTIRQ];
+ break;
+ case CPUACCT_STAT_NSTATS:
+ data = *cpuusage;
+ break;
}
#ifndef CONFIG_64BIT
@@ -132,10 +132,14 @@
return data;
}
-static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu, u64 val)
+static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu)
{
- struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
- int i;
+ u64 *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
+ u64 *cpustat = per_cpu_ptr(ca->cpustat, cpu)->cpustat;
+
+ /* Don't allow to reset global kernel_cpustat */
+ if (ca == &root_cpuacct)
+ return;
#ifndef CONFIG_64BIT
/*
@@ -143,9 +147,10 @@
*/
raw_spin_lock_irq(&cpu_rq(cpu)->lock);
#endif
-
- for (i = 0; i < CPUACCT_STAT_NSTATS; i++)
- cpuusage->usages[i] = val;
+ *cpuusage = 0;
+ cpustat[CPUTIME_USER] = cpustat[CPUTIME_NICE] = 0;
+ cpustat[CPUTIME_SYSTEM] = cpustat[CPUTIME_IRQ] = 0;
+ cpustat[CPUTIME_SOFTIRQ] = 0;
#ifndef CONFIG_64BIT
raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
@@ -196,7 +201,7 @@
return -EINVAL;
for_each_possible_cpu(cpu)
- cpuacct_cpuusage_write(ca, cpu, 0);
+ cpuacct_cpuusage_write(ca, cpu);
return 0;
}
@@ -243,25 +248,10 @@
seq_puts(m, "\n");
for_each_possible_cpu(cpu) {
- struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
-
seq_printf(m, "%d", cpu);
-
- for (index = 0; index < CPUACCT_STAT_NSTATS; index++) {
-#ifndef CONFIG_64BIT
- /*
- * Take rq->lock to make 64-bit read safe on 32-bit
- * platforms.
- */
- raw_spin_lock_irq(&cpu_rq(cpu)->lock);
-#endif
-
- seq_printf(m, " %llu", cpuusage->usages[index]);
-
-#ifndef CONFIG_64BIT
- raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
-#endif
- }
+ for (index = 0; index < CPUACCT_STAT_NSTATS; index++)
+ seq_printf(m, " %llu",
+ cpuacct_cpuusage_read(ca, cpu, index));
seq_puts(m, "\n");
}
return 0;
@@ -338,19 +328,13 @@
*/
void cpuacct_charge(struct task_struct *tsk, u64 cputime)
{
+ unsigned int cpu = task_cpu(tsk);
struct cpuacct *ca;
- int index = CPUACCT_STAT_SYSTEM;
- struct pt_regs *regs = get_irq_regs() ? : task_pt_regs(tsk);
- if (regs && user_mode(regs))
- index = CPUACCT_STAT_USER;
-
- rcu_read_lock();
+ lockdep_assert_held(&cpu_rq(cpu)->lock);
for (ca = task_ca(tsk); ca; ca = parent_ca(ca))
- __this_cpu_add(ca->cpuusage->usages[index], cputime);
-
- rcu_read_unlock();
+ *per_cpu_ptr(ca->cpuusage, cpu) += cputime;
}
/*
--
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