* Ingo Molnar <[email protected]> wrote:
> * Paul Mackerras <[email protected]> wrote:
>
> > Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the
> > deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been
> > broken on powerpc, because we end up counting user time twice: once in
> > timer_interrupt() and once in update_process_times().
> >
> > This fixes the problem by pulling the code in update_process_times
> > that updates utime and stime into a separate function called
> > account_process_tick. If CONFIG_VIRT_CPU_ACCOUNTING is not defined,
> > there is a version of account_process_tick in kernel/timer.c that
> > simply accounts a whole tick to either utime or stime as before. If
> > CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to
> > implement account_process_tick.
> >
> > This also lets us simplify the s390 code a bit; it means that the s390
> > timer interrupt can now call update_process_times even when
> > CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a
> > suitable account_process_tick().
> >
> > Signed-off-by: Paul Mackerras <[email protected]>
>
> lets push this towards Linus via the scheduler tree, ok?
hm, i've removed it for now because it doesnt even build due toj:
+#ifndef CONFIG_VIRT_CPU_ACCOUNTING
+void account_process_tick(int user_tick)
+{
+ if (user_tick) {
+ account_user_time(p, jiffies_to_cputime(1));
+ account_user_time_scaled(p, jiffies_to_cputime(1));
Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
