[S390] /proc/stat idle field for idle cpus

The cpu idle field in the output of /proc/stat is too small for cpus
that have been idle for more than a tick. Add the architecture hook
arch_idle_time that allows to add the not accounted idle time of a
sleeping cpu without waking the cpu.

The s390 implementation of arch_idle_time uses the already existing
s390_idle_data per_cpu variable to find the sleep time of a neighboring
idle cpu.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2009-04-23 13:58:08 +02:00
parent b1ad171efa
commit e1c805309d
3 changed files with 25 additions and 0 deletions

View File

@@ -174,4 +174,8 @@ cputime64_to_clock_t(cputime64_t cputime)
return __div(cputime, 4096000000ULL / USER_HZ);
}
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
#endif /* _S390_CPUTIME_H */