diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-31 15:11:39 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-31 15:11:47 +0100 |
| commit | aa5e97ce4bbc9d5daeec16b1d15bb3f6b7b4f4d4 (patch) | |
| tree | 6bf29daaaca165108bcafa68105d18e64ef01ea2 /arch/s390/include/asm/thread_info.h | |
| parent | 79741dd35713ff4f6fd0eafd59fa94e8a4ba922d (diff) | |
[PATCH] improve precision of process accounting.
The unit of the cputime accouting values that are stored per process is
currently a microsecond. The CPU timer has a maximum granularity of
2**-12 microseconds. There is no benefit in storing the per process values
in the lesser precision and there is the disadvantage that the backend
has to do the rounding to microseconds. The better solution is to use
the maximum granularity of the CPU timer as cputime unit.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/thread_info.h')
| -rw-r--r-- | arch/s390/include/asm/thread_info.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h index c1eaf9604da..c544aa52453 100644 --- a/arch/s390/include/asm/thread_info.h +++ b/arch/s390/include/asm/thread_info.h @@ -47,6 +47,8 @@ struct thread_info { unsigned int cpu; /* current CPU */ int preempt_count; /* 0 => preemptable, <0 => BUG */ struct restart_block restart_block; + __u64 user_timer; + __u64 system_timer; }; /* |