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[S390] irq: have detailed statistics for interrupt types

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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
Show stats Download patch file Download diff file Expand all files Collapse all files

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);