[S390] irq: have detailed statistics for interrupt types
Up to now /proc/interrupts only has statistics for external and i/o
interrupts but doesn't split up them any further.
This patch adds a line for every single interrupt source so that it
is possible to easier tell what the machine is/was doing.
Part of the output now looks like this;
CPU0 CPU2 CPU4
EXT: 3898 4232 2305
I/O: 782 315 245
CLK: 1029 1964 727 [EXT] Clock Comparator
IPI: 2868 2267 1577 [EXT] Signal Processor
TMR: 0 0 0 [EXT] CPU Timer
TAL: 0 0 0 [EXT] Timing Alert
PFL: 0 0 0 [EXT] Pseudo Page Fault
[...]
NMI: 0 1 1 [NMI] Machine Checks
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 026a37a..9bd049b 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -1,7 +1,5 @@
/*
- * arch/s390/kernel/irq.c
- *
- * Copyright IBM Corp. 2004,2007
+ * Copyright IBM Corp. 2004,2010
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Thomas Spatzier (tspat@de.ibm.com)
*
@@ -17,12 +15,31 @@
#include <linux/proc_fs.h>
#include <linux/profile.h>
+struct irq_class {
+ char *name;
+ char *desc;
+};
+
+static const struct irq_class intrclass_names[] = {
+ {.name = "EXT" },
+ {.name = "I/O" },
+ {.name = "CLK", .desc = "[EXT] Clock Comparator" },
+ {.name = "IPI", .desc = "[EXT] Signal Processor" },
+ {.name = "TMR", .desc = "[EXT] CPU Timer" },
+ {.name = "TAL", .desc = "[EXT] Timing Alert" },
+ {.name = "PFL", .desc = "[EXT] Pseudo Page Fault" },
+ {.name = "DSD", .desc = "[EXT] DASD Diag" },
+ {.name = "VRT", .desc = "[EXT] Virtio" },
+ {.name = "SCP", .desc = "[EXT] Service Call" },
+ {.name = "IUC", .desc = "[EXT] IUCV" },
+ {.name = "NMI", .desc = "[NMI] Machine Check" },
+};
+
/*
* show_interrupts is needed by /proc/interrupts.
*/
int show_interrupts(struct seq_file *p, void *v)
{
- static const char *intrclass_names[] = { "EXT", "I/O", };
int i = *(loff_t *) v, j;
get_online_cpus();
@@ -34,15 +51,16 @@
}
if (i < NR_IRQS) {
- seq_printf(p, "%s: ", intrclass_names[i]);
+ seq_printf(p, "%s: ", intrclass_names[i].name);
#ifndef CONFIG_SMP
seq_printf(p, "%10u ", kstat_irqs(i));
#else
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
+ if (intrclass_names[i].desc)
+ seq_printf(p, " %s", intrclass_names[i].desc);
seq_putc(p, '\n');
-
}
put_online_cpus();
return 0;
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 1995c17..fab8843 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -8,6 +8,7 @@
* Heiko Carstens <heiko.carstens@de.ibm.com>,
*/
+#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/hardirq.h>
@@ -255,7 +256,7 @@
nmi_enter();
s390_idle_check(regs, S390_lowcore.mcck_clock,
S390_lowcore.mcck_enter_timer);
-
+ kstat_cpu(smp_processor_id()).irqs[NMI_NMI]++;
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
umode = user_mode(regs);
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 94cf510..a9702df 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -161,6 +161,7 @@
{
unsigned long bits;
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_IPI]++;
/*
* handle bit signal external calls
*
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 4c9d72d..9e7b039 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -15,6 +15,7 @@
#define KMSG_COMPONENT "time"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+#include <linux/kernel_stat.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
@@ -160,6 +161,7 @@
unsigned int param32,
unsigned long param64)
{
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_CLK]++;
if (S390_lowcore.clock_comparator == -1ULL)
set_clock_comparator(S390_lowcore.clock_comparator);
}
@@ -170,6 +172,7 @@
static void timing_alert_interrupt(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_TLA]++;
if (param32 & 0x00c40000)
etr_timing_alert((struct etr_irq_parm *) ¶m32);
if (param32 & 0x00038000)
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 8636dd0..1ccdf4d 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -324,6 +324,7 @@
struct list_head cb_list; /* the callback queue */
__u64 elapsed, next;
+ kstat_cpu(smp_processor_id()).irqs[EXTINT_TMR]++;
INIT_LIST_HEAD(&cb_list);
vq = &__get_cpu_var(virt_cpu_timer);