Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * CPU accounting code for task groups.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Based on the work by Paul Menage (menage@google.com) and Balbir Singh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * (balbir@in.ibm.com).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <asm/irq_regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include "sched.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /* Time spent by the tasks of the CPU accounting group executing in ... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) enum cpuacct_stat_index {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 	CPUACCT_STAT_USER,	/* ... user mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 	CPUACCT_STAT_SYSTEM,	/* ... kernel mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	CPUACCT_STAT_NSTATS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) static const char * const cpuacct_stat_desc[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	[CPUACCT_STAT_USER] = "user",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	[CPUACCT_STAT_SYSTEM] = "system",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) struct cpuacct_usage {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	u64	usages[CPUACCT_STAT_NSTATS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) /* track CPU usage of a group of tasks and its child groups */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) struct cpuacct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct cgroup_subsys_state	css;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	/* cpuusage holds pointer to a u64-type object on every CPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct cpuacct_usage __percpu	*cpuusage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	struct kernel_cpustat __percpu	*cpustat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static inline struct cpuacct *css_ca(struct cgroup_subsys_state *css)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return css ? container_of(css, struct cpuacct, css) : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /* Return CPU accounting group to which this task belongs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static inline struct cpuacct *task_ca(struct task_struct *tsk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	return css_ca(task_css(tsk, cpuacct_cgrp_id));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) static inline struct cpuacct *parent_ca(struct cpuacct *ca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	return css_ca(ca->css.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) static DEFINE_PER_CPU(struct cpuacct_usage, root_cpuacct_cpuusage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static struct cpuacct root_cpuacct = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	.cpustat	= &kernel_cpustat,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	.cpuusage	= &root_cpuacct_cpuusage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /* Create a new CPU accounting group */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static struct cgroup_subsys_state *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) cpuacct_css_alloc(struct cgroup_subsys_state *parent_css)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct cpuacct *ca;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	if (!parent_css)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		return &root_cpuacct.css;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	ca = kzalloc(sizeof(*ca), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (!ca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	ca->cpuusage = alloc_percpu(struct cpuacct_usage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (!ca->cpuusage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		goto out_free_ca;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	ca->cpustat = alloc_percpu(struct kernel_cpustat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (!ca->cpustat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		goto out_free_cpuusage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	return &ca->css;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) out_free_cpuusage:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	free_percpu(ca->cpuusage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) out_free_ca:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	kfree(ca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) /* Destroy an existing CPU accounting group */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) static void cpuacct_css_free(struct cgroup_subsys_state *css)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct cpuacct *ca = css_ca(css);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	free_percpu(ca->cpustat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	free_percpu(ca->cpuusage);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	kfree(ca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static u64 cpuacct_cpuusage_read(struct cpuacct *ca, int cpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 				 enum cpuacct_stat_index index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	u64 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	 * We allow index == CPUACCT_STAT_NSTATS here to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	 * the sum of suages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	BUG_ON(index > CPUACCT_STAT_NSTATS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	 * Take rq->lock to make 64-bit read safe on 32-bit platforms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	raw_spin_lock_irq(&cpu_rq(cpu)->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (index == CPUACCT_STAT_NSTATS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		for (i = 0; i < CPUACCT_STAT_NSTATS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			data += cpuusage->usages[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		data = cpuusage->usages[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu, u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	 * Take rq->lock to make 64-bit write safe on 32-bit platforms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	raw_spin_lock_irq(&cpu_rq(cpu)->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	for (i = 0; i < CPUACCT_STAT_NSTATS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		cpuusage->usages[i] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Return total CPU usage (in nanoseconds) of a group */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static u64 __cpuusage_read(struct cgroup_subsys_state *css,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			   enum cpuacct_stat_index index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct cpuacct *ca = css_ca(css);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	u64 totalcpuusage = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	for_each_possible_cpu(i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		totalcpuusage += cpuacct_cpuusage_read(ca, i, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return totalcpuusage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static u64 cpuusage_user_read(struct cgroup_subsys_state *css,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			      struct cftype *cft)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return __cpuusage_read(css, CPUACCT_STAT_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) static u64 cpuusage_sys_read(struct cgroup_subsys_state *css,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			     struct cftype *cft)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	return __cpuusage_read(css, CPUACCT_STAT_SYSTEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static u64 cpuusage_read(struct cgroup_subsys_state *css, struct cftype *cft)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	return __cpuusage_read(css, CPUACCT_STAT_NSTATS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int cpuusage_write(struct cgroup_subsys_state *css, struct cftype *cft,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 			  u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct cpuacct *ca = css_ca(css);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	 * Only allow '0' here to do a reset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	for_each_possible_cpu(cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		cpuacct_cpuusage_write(ca, cpu, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int __cpuacct_percpu_seq_show(struct seq_file *m,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 				     enum cpuacct_stat_index index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct cpuacct *ca = css_ca(seq_css(m));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	u64 percpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	for_each_possible_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		percpu = cpuacct_cpuusage_read(ca, i, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		seq_printf(m, "%llu ", (unsigned long long) percpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	seq_printf(m, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static int cpuacct_percpu_user_seq_show(struct seq_file *m, void *V)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_USER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int cpuacct_percpu_sys_seq_show(struct seq_file *m, void *V)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_SYSTEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static int cpuacct_percpu_seq_show(struct seq_file *m, void *V)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_NSTATS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static int cpuacct_all_seq_show(struct seq_file *m, void *V)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	struct cpuacct *ca = css_ca(seq_css(m));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	int index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	seq_puts(m, "cpu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	for (index = 0; index < CPUACCT_STAT_NSTATS; index++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 		seq_printf(m, " %s", cpuacct_stat_desc[index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	seq_puts(m, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		seq_printf(m, "%d", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		for (index = 0; index < CPUACCT_STAT_NSTATS; index++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			 * Take rq->lock to make 64-bit read safe on 32-bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 			 * platforms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			raw_spin_lock_irq(&cpu_rq(cpu)->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 			seq_printf(m, " %llu", cpuusage->usages[index]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) #ifndef CONFIG_64BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 			raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		seq_puts(m, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) static int cpuacct_stats_show(struct seq_file *sf, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	struct cpuacct *ca = css_ca(seq_css(sf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	s64 val[CPUACCT_STAT_NSTATS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	int stat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	memset(val, 0, sizeof(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		u64 *cpustat = per_cpu_ptr(ca->cpustat, cpu)->cpustat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		val[CPUACCT_STAT_USER]   += cpustat[CPUTIME_USER];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		val[CPUACCT_STAT_USER]   += cpustat[CPUTIME_NICE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		val[CPUACCT_STAT_SYSTEM] += cpustat[CPUTIME_SYSTEM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		val[CPUACCT_STAT_SYSTEM] += cpustat[CPUTIME_IRQ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		val[CPUACCT_STAT_SYSTEM] += cpustat[CPUTIME_SOFTIRQ];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	for (stat = 0; stat < CPUACCT_STAT_NSTATS; stat++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		seq_printf(sf, "%s %lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 			   cpuacct_stat_desc[stat],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 			   (long long)nsec_to_clock_t(val[stat]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static struct cftype files[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		.name = "usage",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		.read_u64 = cpuusage_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		.write_u64 = cpuusage_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		.name = "usage_user",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		.read_u64 = cpuusage_user_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		.name = "usage_sys",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		.read_u64 = cpuusage_sys_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		.name = "usage_percpu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		.seq_show = cpuacct_percpu_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		.name = "usage_percpu_user",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		.seq_show = cpuacct_percpu_user_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		.name = "usage_percpu_sys",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		.seq_show = cpuacct_percpu_sys_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		.name = "usage_all",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		.seq_show = cpuacct_all_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		.name = "stat",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		.seq_show = cpuacct_stats_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	{ }	/* terminate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)  * charge this task's execution time to its accounting group.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)  * called with rq->lock held.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) void cpuacct_charge(struct task_struct *tsk, u64 cputime)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	struct cpuacct *ca;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	int index = CPUACCT_STAT_SYSTEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	struct pt_regs *regs = get_irq_regs() ? : task_pt_regs(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if (regs && user_mode(regs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		index = CPUACCT_STAT_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	for (ca = task_ca(tsk); ca; ca = parent_ca(ca))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		__this_cpu_add(ca->cpuusage->usages[index], cputime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)  * Add user/system time to cpuacct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)  * Note: it's the caller that updates the account of the root cgroup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) void cpuacct_account_field(struct task_struct *tsk, int index, u64 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	struct cpuacct *ca;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	for (ca = task_ca(tsk); ca != &root_cpuacct; ca = parent_ca(ca))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		__this_cpu_add(ca->cpustat->cpustat[index], val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) struct cgroup_subsys cpuacct_cgrp_subsys = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	.css_alloc	= cpuacct_css_alloc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	.css_free	= cpuacct_css_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	.legacy_cftypes	= files,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	.early_init	= true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) };