* [PATCH 1/3] cpuacct: Merge cpuacct_usage_index and cpuacct_usage_index
2016-05-10 17:43 [PATCH 0/3] cpuacct: Show all detail stats in one file Zhao Lei
@ 2016-05-10 17:43 ` Zhao Lei
2016-05-12 7:49 ` Ingo Molnar
2016-05-10 17:43 ` [PATCH 2/3] cpuacct: Simplify cpuacct_stats_show Zhao Lei
2016-05-10 17:43 ` [PATCH 3/3] cpuacct: Show all detail stats in one file Zhao Lei
2 siblings, 1 reply; 7+ messages in thread
From: Zhao Lei @ 2016-05-10 17:43 UTC (permalink / raw)
To: linux-kernel, Peter Zijlstra; +Cc: Zhao Lei
These two types have similar function.
No need to separate them.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
kernel/sched/cpuacct.c | 47 ++++++++++++++++++++---------------------------
1 file changed, 20 insertions(+), 27 deletions(-)
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 41f85c4..74241eb 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -25,15 +25,13 @@ enum cpuacct_stat_index {
CPUACCT_STAT_NSTATS,
};
-enum cpuacct_usage_index {
- CPUACCT_USAGE_USER, /* ... user mode */
- CPUACCT_USAGE_SYSTEM, /* ... kernel mode */
-
- CPUACCT_USAGE_NRUSAGE,
+static const char * const cpuacct_stat_desc[] = {
+ [CPUACCT_STAT_USER] = "user",
+ [CPUACCT_STAT_SYSTEM] = "system",
};
struct cpuacct_usage {
- u64 usages[CPUACCT_USAGE_NRUSAGE];
+ u64 usages[CPUACCT_STAT_NSTATS];
};
/* track cpu usage of a group of tasks and its child groups */
@@ -108,16 +106,16 @@ static void cpuacct_css_free(struct cgroup_subsys_state *css)
}
static u64 cpuacct_cpuusage_read(struct cpuacct *ca, int cpu,
- enum cpuacct_usage_index index)
+ enum cpuacct_stat_index index)
{
struct cpuacct_usage *cpuusage = per_cpu_ptr(ca->cpuusage, cpu);
u64 data;
/*
- * We allow index == CPUACCT_USAGE_NRUSAGE here to read
+ * We allow index == CPUACCT_STAT_NSTATS here to read
* the sum of suages.
*/
- BUG_ON(index > CPUACCT_USAGE_NRUSAGE);
+ BUG_ON(index > CPUACCT_STAT_NSTATS);
#ifndef CONFIG_64BIT
/*
@@ -126,11 +124,11 @@ static u64 cpuacct_cpuusage_read(struct cpuacct *ca, int cpu,
raw_spin_lock_irq(&cpu_rq(cpu)->lock);
#endif
- if (index == CPUACCT_USAGE_NRUSAGE) {
+ if (index == CPUACCT_STAT_NSTATS) {
int i = 0;
data = 0;
- for (i = 0; i < CPUACCT_USAGE_NRUSAGE; i++)
+ for (i = 0; i < CPUACCT_STAT_NSTATS; i++)
data += cpuusage->usages[i];
} else {
data = cpuusage->usages[index];
@@ -155,7 +153,7 @@ static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu, u64 val)
raw_spin_lock_irq(&cpu_rq(cpu)->lock);
#endif
- for (i = 0; i < CPUACCT_USAGE_NRUSAGE; i++)
+ for (i = 0; i < CPUACCT_STAT_NSTATS; i++)
cpuusage->usages[i] = val;
#ifndef CONFIG_64BIT
@@ -165,7 +163,7 @@ static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu, u64 val)
/* return total cpu usage (in nanoseconds) of a group */
static u64 __cpuusage_read(struct cgroup_subsys_state *css,
- enum cpuacct_usage_index index)
+ enum cpuacct_stat_index index)
{
struct cpuacct *ca = css_ca(css);
u64 totalcpuusage = 0;
@@ -180,18 +178,18 @@ static u64 __cpuusage_read(struct cgroup_subsys_state *css,
static u64 cpuusage_user_read(struct cgroup_subsys_state *css,
struct cftype *cft)
{
- return __cpuusage_read(css, CPUACCT_USAGE_USER);
+ return __cpuusage_read(css, CPUACCT_STAT_USER);
}
static u64 cpuusage_sys_read(struct cgroup_subsys_state *css,
struct cftype *cft)
{
- return __cpuusage_read(css, CPUACCT_USAGE_SYSTEM);
+ return __cpuusage_read(css, CPUACCT_STAT_SYSTEM);
}
static u64 cpuusage_read(struct cgroup_subsys_state *css, struct cftype *cft)
{
- return __cpuusage_read(css, CPUACCT_USAGE_NRUSAGE);
+ return __cpuusage_read(css, CPUACCT_STAT_NSTATS);
}
static int cpuusage_write(struct cgroup_subsys_state *css, struct cftype *cft,
@@ -213,7 +211,7 @@ static int cpuusage_write(struct cgroup_subsys_state *css, struct cftype *cft,
}
static int __cpuacct_percpu_seq_show(struct seq_file *m,
- enum cpuacct_usage_index index)
+ enum cpuacct_stat_index index)
{
struct cpuacct *ca = css_ca(seq_css(m));
u64 percpu;
@@ -229,24 +227,19 @@ static int __cpuacct_percpu_seq_show(struct seq_file *m,
static int cpuacct_percpu_user_seq_show(struct seq_file *m, void *V)
{
- return __cpuacct_percpu_seq_show(m, CPUACCT_USAGE_USER);
+ return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_USER);
}
static int cpuacct_percpu_sys_seq_show(struct seq_file *m, void *V)
{
- return __cpuacct_percpu_seq_show(m, CPUACCT_USAGE_SYSTEM);
+ return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_SYSTEM);
}
static int cpuacct_percpu_seq_show(struct seq_file *m, void *V)
{
- return __cpuacct_percpu_seq_show(m, CPUACCT_USAGE_NRUSAGE);
+ return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_NSTATS);
}
-static const char * const cpuacct_stat_desc[] = {
- [CPUACCT_STAT_USER] = "user",
- [CPUACCT_STAT_SYSTEM] = "system",
-};
-
static int cpuacct_stats_show(struct seq_file *sf, void *v)
{
struct cpuacct *ca = css_ca(seq_css(sf));
@@ -316,11 +309,11 @@ static struct cftype files[] = {
void cpuacct_charge(struct task_struct *tsk, u64 cputime)
{
struct cpuacct *ca;
- int index = CPUACCT_USAGE_SYSTEM;
+ int index = CPUACCT_STAT_SYSTEM;
struct pt_regs *regs = task_pt_regs(tsk);
if (regs && user_mode(regs))
- index = CPUACCT_USAGE_USER;
+ index = CPUACCT_STAT_USER;
rcu_read_lock();
--
1.8.5.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 2/3] cpuacct: Simplify cpuacct_stats_show
2016-05-10 17:43 [PATCH 0/3] cpuacct: Show all detail stats in one file Zhao Lei
2016-05-10 17:43 ` [PATCH 1/3] cpuacct: Merge cpuacct_usage_index and cpuacct_usage_index Zhao Lei
@ 2016-05-10 17:43 ` Zhao Lei
2016-05-12 7:47 ` Ingo Molnar
2016-05-10 17:43 ` [PATCH 3/3] cpuacct: Show all detail stats in one file Zhao Lei
2 siblings, 1 reply; 7+ messages in thread
From: Zhao Lei @ 2016-05-10 17:43 UTC (permalink / raw)
To: linux-kernel, Peter Zijlstra; +Cc: Zhao Lei
Merge code for each cpustat(system/user) into a loop,
to avoid clone of code blocks.
Only a little cleanup.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
kernel/sched/cpuacct.c | 29 ++++++++++++++---------------
1 file changed, 14 insertions(+), 15 deletions(-)
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 74241eb..e643483 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -243,28 +243,27 @@ static int cpuacct_percpu_seq_show(struct seq_file *m, void *V)
static int cpuacct_stats_show(struct seq_file *sf, void *v)
{
struct cpuacct *ca = css_ca(seq_css(sf));
+ s64 val[CPUACCT_STAT_NSTATS];
int cpu;
- s64 val = 0;
+ int stat;
+ memset(val, 0, sizeof(val));
for_each_possible_cpu(cpu) {
- struct kernel_cpustat *kcpustat = per_cpu_ptr(ca->cpustat, cpu);
- val += kcpustat->cpustat[CPUTIME_USER];
- val += kcpustat->cpustat[CPUTIME_NICE];
+ struct kernel_cpustat *kcpustat = per_cpu_ptr(ca->cpustat,
+ cpu);
+ val[CPUACCT_STAT_USER] += kcpustat->cpustat[CPUTIME_USER];
+ val[CPUACCT_STAT_USER] += kcpustat->cpustat[CPUTIME_NICE];
+ val[CPUACCT_STAT_SYSTEM] += kcpustat->cpustat[CPUTIME_SYSTEM];
+ val[CPUACCT_STAT_SYSTEM] += kcpustat->cpustat[CPUTIME_IRQ];
+ val[CPUACCT_STAT_SYSTEM] += kcpustat->cpustat[CPUTIME_SOFTIRQ];
}
- val = cputime64_to_clock_t(val);
- seq_printf(sf, "%s %lld\n", cpuacct_stat_desc[CPUACCT_STAT_USER], val);
- val = 0;
- for_each_possible_cpu(cpu) {
- struct kernel_cpustat *kcpustat = per_cpu_ptr(ca->cpustat, cpu);
- val += kcpustat->cpustat[CPUTIME_SYSTEM];
- val += kcpustat->cpustat[CPUTIME_IRQ];
- val += kcpustat->cpustat[CPUTIME_SOFTIRQ];
+ for (stat = 0; stat < CPUACCT_STAT_NSTATS; stat++) {
+ seq_printf(sf, "%s %lld\n",
+ cpuacct_stat_desc[stat],
+ cputime64_to_clock_t(val[stat]));
}
- val = cputime64_to_clock_t(val);
- seq_printf(sf, "%s %lld\n", cpuacct_stat_desc[CPUACCT_STAT_SYSTEM], val);
-
return 0;
}
--
1.8.5.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH 3/3] cpuacct: Show all detail stats in one file
2016-05-10 17:43 [PATCH 0/3] cpuacct: Show all detail stats in one file Zhao Lei
2016-05-10 17:43 ` [PATCH 1/3] cpuacct: Merge cpuacct_usage_index and cpuacct_usage_index Zhao Lei
2016-05-10 17:43 ` [PATCH 2/3] cpuacct: Simplify cpuacct_stats_show Zhao Lei
@ 2016-05-10 17:43 ` Zhao Lei
2016-05-11 11:39 ` Peter Zijlstra
2 siblings, 1 reply; 7+ messages in thread
From: Zhao Lei @ 2016-05-10 17:43 UTC (permalink / raw)
To: linux-kernel, Peter Zijlstra; +Cc: Zhao Lei
In current code, we can get cpuacct data from severial files,
but each file have its lilmit.
For example:
we can get cpu usage in user and kernel mode by cpuacct.stat,
but we can't get detail data of each cpu in above file.
we can get each cpu's kernel mode usage in cpuacct.usage_percpu_sys,
but we can't get user mode data in the same time.
This patch introduce cpuacct.usage_all, to show all detailed
cpu accounting data altogether:
# cat cpuacct.usage_all
[cpu] user system
[0] 3809760299 5807968992
[1] 3250329855 454612211
..
Any aspects of statistics data can be get from this file
with a simple data-processing code.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
kernel/sched/cpuacct.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index e643483..b84ae40 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -240,6 +240,42 @@ static int cpuacct_percpu_seq_show(struct seq_file *m, void *V)
return __cpuacct_percpu_seq_show(m, CPUACCT_STAT_NSTATS);
}
+static int cpuacct_all_seq_show(struct seq_file *m, void *V)
+{
+ struct cpuacct *ca = css_ca(seq_css(m));
+ int index;
+ int cpu;
+
+ seq_puts(m, "[cpu]");
+ for (index = 0; index < CPUACCT_STAT_NSTATS; index++)
+ seq_printf(m, " %s", cpuacct_stat_desc[index]);
+ 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
+ }
+ seq_puts(m, "\n");
+ }
+ return 0;
+}
+
static int cpuacct_stats_show(struct seq_file *sf, void *v)
{
struct cpuacct *ca = css_ca(seq_css(sf));
@@ -294,6 +330,10 @@ static struct cftype files[] = {
.seq_show = cpuacct_percpu_sys_seq_show,
},
{
+ .name = "usage_all",
+ .seq_show = cpuacct_all_seq_show,
+ },
+ {
.name = "stat",
.seq_show = cpuacct_stats_show,
},
--
1.8.5.1
^ permalink raw reply related [flat|nested] 7+ messages in thread