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[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>
This commit is contained in:
Heiko Carstens 2011-01-05 12:47:28 +01:00 committed by Martin Schwidefsky
parent 545b288dcb
commit 052ff461c8
11 changed files with 56 additions and 20 deletions
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23
arch/s390/include/asm/irq.h
View File

@ -1,23 +1,22 @@
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H
#ifdef __KERNEL__
#include <linux/hardirq.h>
/*
* the definition of irqs has changed in 2.5.46:
* NR_IRQS is no longer the number of i/o
* interrupts (65536), but rather the number
* of interrupt classes (2).
* Only external and i/o interrupts make much sense here (CH).
*/
enum interruption_class {
EXTERNAL_INTERRUPT,
IO_INTERRUPT,
EXTINT_CLK,
EXTINT_IPI,
EXTINT_TMR,
EXTINT_TLA,
EXTINT_PFL,
EXTINT_DSD,
EXTINT_VRT,
EXTINT_SCP,
EXTINT_IUC,
NMI_NMI,
NR_IRQS,
};
#endif /* __KERNEL__ */
#endif
#endif /* _ASM_IRQ_H */

30
arch/s390/kernel/irq.c
View File

@ -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 @@ int show_interrupts(struct seq_file *p, void *v)
}
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;

3
arch/s390/kernel/nmi.c
View File

@ -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 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
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);

1
arch/s390/kernel/smp.c
View File

@ -161,6 +161,7 @@ static void do_ext_call_interrupt(unsigned int ext_int_code,
{
unsigned long bits;
kstat_cpu(smp_processor_id()).irqs[EXTINT_IPI]++;
/*
* handle bit signal external calls
*

3
arch/s390/kernel/time.c
View File

@ -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 @@ static void clock_comparator_interrupt(unsigned int ext_int_code,
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 stp_timing_alert(struct stp_irq_parm *);
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 *) &param32);
if (param32 & 0x00038000)

1
arch/s390/kernel/vtime.c
View File

@ -324,6 +324,7 @@ static void do_cpu_timer_interrupt(unsigned int ext_int_code,
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);

2
arch/s390/mm/fault.c
View File

@ -10,6 +10,7 @@
* Copyright (C) 1995 Linus Torvalds
*/
#include <linux/kernel_stat.h>
#include <linux/perf_event.h>
#include <linux/signal.h>
#include <linux/sched.h>
@ -543,6 +544,7 @@ static void pfault_interrupt(unsigned int ext_int_code,
struct task_struct *tsk;
__u16 subcode;
kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;
/*
* Get the external interruption subcode & pfault
* initial/completion signal bit. VM stores this

2
drivers/s390/block/dasd_diag.c
View File

@ -10,6 +10,7 @@
#define KMSG_COMPONENT "dasd"
#include <linux/kernel_stat.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/slab.h>
@ -238,6 +239,7 @@ static void dasd_ext_handler(unsigned int ext_int_code,
addr_t ip;
int rc;
kstat_cpu(smp_processor_id()).irqs[EXTINT_DSD]++;
switch (ext_int_code >> 24) {
case DASD_DIAG_CODE_31BIT:
ip = (addr_t) param32;

6
drivers/s390/char/sclp.c
View File

@ -7,6 +7,7 @@
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/spinlock.h>
@ -18,8 +19,9 @@
#include <linux/suspend.h>
#include <linux/completion.h>
#include <linux/platform_device.h>
#include <asm/types.h>
#include <asm/s390_ext.h>
#include <asm/types.h>
#include <asm/irq.h>
#include "sclp.h"
@ -402,6 +404,7 @@ static void sclp_interrupt_handler(unsigned int ext_int_code,
u32 finished_sccb;
u32 evbuf_pending;
kstat_cpu(smp_processor_id()).irqs[EXTINT_SCP]++;
spin_lock(&sclp_lock);
finished_sccb = param32 & 0xfffffff8;
evbuf_pending = param32 & 0x3;
@ -824,6 +827,7 @@ static void sclp_check_handler(unsigned int ext_int_code,
{
u32 finished_sccb;
kstat_cpu(smp_processor_id()).irqs[EXTINT_SCP]++;
finished_sccb = param32 & 0xfffffff8;
/* Is this the interrupt we are waiting for? */
if (finished_sccb == 0)

3
drivers/s390/kvm/kvm_virtio.c
View File

@ -10,6 +10,7 @@
* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
*/
#include <linux/kernel_stat.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/err.h>
@ -25,6 +26,7 @@
#include <asm/kvm_virtio.h>
#include <asm/setup.h>
#include <asm/s390_ext.h>
#include <asm/irq.h>
#define VIRTIO_SUBCODE_64 0x0D00
@ -379,6 +381,7 @@ static void kvm_extint_handler(unsigned int ext_int_code,
u16 subcode;
u32 param;
kstat_cpu(smp_processor_id()).irqs[EXTINT_VRT]++;
subcode = ext_int_code >> 16;
if ((subcode & 0xff00) != VIRTIO_SUBCODE_64)
return;

2
net/iucv/iucv.c
View File

@ -36,6 +36,7 @@
#define KMSG_COMPONENT "iucv"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
@ -1804,6 +1805,7 @@ static void iucv_external_interrupt(unsigned int ext_int_code,
struct iucv_irq_data *p;
struct iucv_irq_list *work;
kstat_cpu(smp_processor_id()).irqs[EXTINT_IUC]++;
p = iucv_irq_data[smp_processor_id()];
if (p->ippathid >= iucv_max_pathid) {
WARN_ON(p->ippathid >= iucv_max_pathid);