A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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[PATCH] improve idle cputime accounting

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Distinguish the cputime of the idle process where idle is actually using
cpu cycles from the cputime where idle is sleeping on an enabled wait psw.
The former is accounted as system time, the later as idle time.

Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Martin Schwidefsky 2008-12-31 15:11:41 +01:00
commit 9cfb9b3c3a
9 changed files with 248 additions and 265 deletions
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2
drivers/s390/cio/cio.c
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@ -632,8 +632,8 @@ do_IRQ (struct pt_regs *regs)
struct pt_regs *old_regs;
old_regs = set_irq_regs(regs);
irq_enter();
s390_idle_check();
irq_enter();
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
/* Serve timer interrupts first. */
clock_comparator_work();

3
drivers/s390/s390mach.c
View file

@ -18,6 +18,7 @@
#include <asm/etr.h>
#include <asm/lowcore.h>
#include <asm/cio.h>
#include <asm/cpu.h>
#include "s390mach.h"
static struct semaphore m_sem;
@ -369,6 +370,8 @@ s390_do_machine_check(struct pt_regs *regs)
lockdep_off();
s390_idle_check();
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
umode = user_mode(regs);