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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
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30
arch/s390/kernel/irq.c
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@@ -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;