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/lowcore.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/lowcore.h')
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index 0bc51d52a89..a547817cf1a 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -67,11 +67,11 @@ #define __LC_SYNC_ENTER_TIMER 0x248 #define __LC_ASYNC_ENTER_TIMER 0x250 #define __LC_EXIT_TIMER 0x258 -#define __LC_LAST_UPDATE_TIMER 0x260 -#define __LC_USER_TIMER 0x268 -#define __LC_SYSTEM_TIMER 0x270 -#define __LC_LAST_UPDATE_CLOCK 0x278 -#define __LC_STEAL_CLOCK 0x280 +#define __LC_USER_TIMER 0x260 +#define __LC_SYSTEM_TIMER 0x268 +#define __LC_STEAL_TIMER 0x270 +#define __LC_LAST_UPDATE_TIMER 0x278 +#define __LC_LAST_UPDATE_CLOCK 0x280 #define __LC_RETURN_MCCK_PSW 0x288 #define __LC_KERNEL_STACK 0xC40 #define __LC_THREAD_INFO 0xC44 @@ -89,11 +89,11 @@ #define __LC_SYNC_ENTER_TIMER 0x250 #define __LC_ASYNC_ENTER_TIMER 0x258 #define __LC_EXIT_TIMER 0x260 -#define __LC_LAST_UPDATE_TIMER 0x268 -#define __LC_USER_TIMER 0x270 -#define __LC_SYSTEM_TIMER 0x278 -#define __LC_LAST_UPDATE_CLOCK 0x280 -#define __LC_STEAL_CLOCK 0x288 +#define __LC_USER_TIMER 0x268 +#define __LC_SYSTEM_TIMER 0x270 +#define __LC_STEAL_TIMER 0x278 +#define __LC_LAST_UPDATE_TIMER 0x280 +#define __LC_LAST_UPDATE_CLOCK 0x288 #define __LC_RETURN_MCCK_PSW 0x290 #define __LC_KERNEL_STACK 0xD40 #define __LC_THREAD_INFO 0xD48 @@ -252,11 +252,11 @@ struct _lowcore __u64 sync_enter_timer; /* 0x248 */ __u64 async_enter_timer; /* 0x250 */ __u64 exit_timer; /* 0x258 */ - __u64 last_update_timer; /* 0x260 */ - __u64 user_timer; /* 0x268 */ - __u64 system_timer; /* 0x270 */ - __u64 last_update_clock; /* 0x278 */ - __u64 steal_clock; /* 0x280 */ + __u64 user_timer; /* 0x260 */ + __u64 system_timer; /* 0x268 */ + __u64 steal_timer; /* 0x270 */ + __u64 last_update_timer; /* 0x278 */ + __u64 last_update_clock; /* 0x280 */ psw_t return_mcck_psw; /* 0x288 */ __u8 pad8[0xc00-0x290]; /* 0x290 */ @@ -343,11 +343,11 @@ struct _lowcore __u64 sync_enter_timer; /* 0x250 */ __u64 async_enter_timer; /* 0x258 */ __u64 exit_timer; /* 0x260 */ - __u64 last_update_timer; /* 0x268 */ - __u64 user_timer; /* 0x270 */ - __u64 system_timer; /* 0x278 */ - __u64 last_update_clock; /* 0x280 */ - __u64 steal_clock; /* 0x288 */ + __u64 user_timer; /* 0x268 */ + __u64 system_timer; /* 0x270 */ + __u64 steal_timer; /* 0x278 */ + __u64 last_update_timer; /* 0x280 */ + __u64 last_update_clock; /* 0x288 */ psw_t return_mcck_psw; /* 0x290 */ __u8 pad8[0xc00-0x2a0]; /* 0x2a0 */ /* System info area */ |