linux/arch/ia64
Hidetoshi Seto b64f34cdfe [IA64] VIRT_CPU_ACCOUNTING (accurate cpu time accounting)
This patch implements VIRT_CPU_ACCOUNTING for ia64,
which enable us to use more accurate cpu time accounting.

The VIRT_CPU_ACCOUNTING is an item of kernel config, which s390
and powerpc arch have.  By turning this config on, these archs
change the mechanism of cpu time accounting from tick-sampling
based one to state-transition based one.

The state-transition based accounting is done by checking time
(cycle counter in processor) at every state-transition point,
such as entrance/exit of kernel, interrupt, softirq etc.
The difference between point to point is the actual time consumed
during in the state. There is no doubt about that this value is
more accurate than that of tick-sampling based accounting.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2008-02-20 12:55:37 -08:00
..
configs [IA64] update sn2 defconfig to 64kb pages 2007-10-29 11:32:42 -07:00
dig [PATCH] tty: Remove include of screen_info.h from tty.h 2006-07-10 13:24:16 -07:00
hp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2008-02-05 10:24:52 -08:00
ia32 [IA64] VIRT_CPU_ACCOUNTING (accurate cpu time accounting) 2008-02-20 12:55:37 -08:00
kernel [IA64] VIRT_CPU_ACCOUNTING (accurate cpu time accounting) 2008-02-20 12:55:37 -08:00
lib [IA64] export copy_page() to modules 2007-12-07 16:10:19 -08:00
mm Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00
oprofile Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
pci Change pci_raw_ops to pci_raw_read/write 2008-02-10 12:52:46 -08:00
scripts [IA64] don't assume that unwcheck.py is executable 2007-12-07 14:42:08 -08:00
sn Change pci_raw_ops to pci_raw_read/write 2008-02-10 12:52:46 -08:00
defconfig [IA64] Update arch/ia64/configs/* s/SLAB/SLUB/ 2007-08-13 14:54:34 -07:00
install.sh Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Kconfig [IA64] VIRT_CPU_ACCOUNTING (accurate cpu time accounting) 2008-02-20 12:55:37 -08:00
Kconfig.debug [PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu 2005-11-07 07:53:35 -08:00
Makefile [IA64] don't assume that unwcheck.py is executable 2007-12-07 14:42:08 -08:00
module.lds Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00