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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-31 15:11:37 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-31 15:11:46 +0100 |
| commit | 457533a7d3402d1d91fbc125c8bd1bd16dcd3cd4 (patch) | |
| tree | cbe69310a66176dea2a9e7bd201db95efe4a2890 /kernel/timer.c | |
| parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
| download | lwn-457533a7d3402d1d91fbc125c8bd1bd16dcd3cd4.tar.gz lwn-457533a7d3402d1d91fbc125c8bd1bd16dcd3cd4.zip | |
[PATCH] fix scaled & unscaled cputime accounting
The utimescaled / stimescaled fields in the task structure and the
global cpustat should be set on all architectures. On s390 the calls
to account_user_time_scaled and account_system_time_scaled never have
been added. In addition system time that is accounted as guest time
to the user time of a process is accounted to the scaled system time
instead of the scaled user time.
To fix the bugs and to prevent future forgetfulness this patch merges
account_system_time_scaled into account_system_time and
account_user_time_scaled into account_user_time.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Michael Neuling <mikey@neuling.org>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index 566257d1dc10..b5efb528aa1d 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1023,13 +1023,11 @@ void account_process_tick(struct task_struct *p, int user_tick) { cputime_t one_jiffy = jiffies_to_cputime(1); - if (user_tick) { - account_user_time(p, one_jiffy); - account_user_time_scaled(p, cputime_to_scaled(one_jiffy)); - } else { - account_system_time(p, HARDIRQ_OFFSET, one_jiffy); - account_system_time_scaled(p, cputime_to_scaled(one_jiffy)); - } + if (user_tick) + account_user_time(p, one_jiffy, cputime_to_scaled(one_jiffy)); + else + account_system_time(p, HARDIRQ_OFFSET, one_jiffy, + cputime_to_scaled(one_jiffy)); } #endif |