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Chen, Kenneth W 383f2835eb [PATCH] Prefetch kernel stacks to speed up context switch 
For architecture like ia64, the switch stack structure is fairly large
(currently 528 bytes).  For context switch intensive application, we found
that significant amount of cache misses occurs in switch_to() function.
The following patch adds a hook in the schedule() function to prefetch
switch stack structure as soon as 'next' task is determined.  This allows
maximum overlap in prefetch cache lines for that structure.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
History 2005-09-09 13:57:31 -07:00
..
alpha [PATCH] alpha: process_reloc_for_got confuses r_offset and r_addend 2005-09-09 13:57:30 -07:00
arm Merge master.kernel.org:/home/rmk/linux-2.6-serial 2005-09-08 15:30:14 -07:00
arm26 [PATCH] Kconfig fix (BLK_DEV_FD dependencies) 2005-09-07 17:17:12 -07:00
cris [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00
frv [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00
h8300 [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00
i386 [PATCH] i386: seccomp fix for auditing/ptrace 2005-09-09 13:57:30 -07:00
ia64 [PATCH] Prefetch kernel stacks to speed up context switch 2005-09-09 13:57:31 -07:00
m32r [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00
m68k [PATCH] Kconfig fix (BLK_DEV_FD dependencies) 2005-09-07 17:17:12 -07:00
m68knommu [PATCH] m68knommu: extract common timer code for 68EZ328 processor 2005-09-08 17:27:37 -07:00
mips [PATCH] mips: add TANBAC TB0287 support 2005-09-09 13:57:30 -07:00
parisc [PATCH] Kconfig fix (BLK_DEV_FD dependencies) 2005-09-07 17:17:12 -07:00
ppc [PATCH] ppc32: Kill PVR_440* defines 2005-09-09 13:57:29 -07:00
ppc64 Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/ppc64-2.6 2005-09-09 10:38:02 -07:00
s390 [PATCH] missing CHECKFLAGS on s390 2005-09-09 10:31:58 -07:00
sh [PATCH] Kconfig fix (BLK_DEV_FD dependencies) 2005-09-07 17:17:12 -07:00
sh64 [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00
sparc [PATCH] Kconfig fix (BLK_DEV_FD dependencies) 2005-09-07 17:17:12 -07:00
sparc64 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2005-09-08 15:55:23 -07:00
um [PATCH] uaccess.h annotations (uml) 2005-09-09 10:31:58 -07:00
v850 [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00
x86_64 [PATCH] x86_64: Don't call enforce_max_cpus when hotplug is enabled 2005-09-09 13:57:30 -07:00
xtensa [PATCH] NTP: ntp-helper functions 2005-09-07 16:57:34 -07:00