Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Ingo Molnar 9fcd18c9e6 sched: re-tune balancing ... Impact: improve wakeup affinity on NUMA systems, tweak SMP systems Given the fixes+tweaks to the wakeup-buddy code, re-tweak the domain balancing defaults on NUMA and SMP systems. Turn on SD_WAKE_AFFINE which was off on x86 NUMA - there's no reason why we would not want to have wakeup affinity across nodes as well. (we already do this in the standard NUMA template.) lat_ctx on a NUMA box is particularly happy about this change: before: | phoenix:~/l> ./lat_ctx -s 0 2 | "size=0k ovr=2.60 | 2 5.70 after: | phoenix:~/l> ./lat_ctx -s 0 2 | "size=0k ovr=2.65 | 2 2.07 a 2.75x speedup. pipe-test is similarly happy about it too: | phoenix:~/sched-tests> ./pipe-test | 18.26 usecs/loop. | 14.70 usecs/loop. | 14.38 usecs/loop. | 10.55 usecs/loop. # +WAKE_AFFINE on domain0+domain1 | 8.63 usecs/loop. | 8.59 usecs/loop. | 9.03 usecs/loop. | 8.94 usecs/loop. | 8.96 usecs/loop. | 8.63 usecs/loop. Also: - disable SD_BALANCE_NEWIDLE on NUMA and SMP domains (keep it for siblings) - enable SD_WAKE_BALANCE on SMP domains Sysbench+postgresql improves all around the board, quite significantly: .28-rc3-11474e2c .28-rc3-11474e2c-tune ------------------------------------------------- 1: 571 688 +17.08% 2: 1236 1206 -2.55% 4: 2381 2642 +9.89% 8: 4958 5164 +3.99% 16: 9580 9574 -0.07% 32: 7128 8118 +12.20% 64: 7342 8266 +11.18% 128: 7342 8064 +8.95% 256: 7519 7884 +4.62% 512: 7350 7731 +4.93% ------------------------------------------------- SUM: 55412 59341 +6.62% So it's a win both for the runup portion, the peak area and the tail. Signed-off-by: Ingo Molnar <mingo@elte.hu>		2008-11-05 18:04:38 +01:00
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acpi	Merge branch 'linus' into test	2008-10-23 00:11:07 -04:00
asm-arm
asm-frv
asm-generic	asm-generic: define DIE_OOPS in asm-generic	2008-10-27 11:39:03 +01:00
asm-h8300
asm-m32r
asm-m68k	proc: move /proc/hardware to m68k-specific code	2008-10-23 14:24:03 +04:00
asm-mn10300
asm-x86	x86: add iomap_atomic*()/iounmap_atomic() on 32-bit using fixmaps	2008-10-31 10:12:38 +01:00
asm-xtensa	Merge git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6	2008-10-23 09:16:56 -07:00
crypto
drm	i915: Add GEM ioctl to get available aperture size.	2008-11-03 10:56:49 +10:00
keys
linux	sched: re-tune balancing	2008-11-05 18:04:38 +01:00
math-emu	math-emu: Fix thinko in _FP_DIV	2008-10-22 22:09:59 -07:00
media
mtd
net	netns: add register_pernet_gen_subsys/unregister_pernet_gen_subsys	2008-10-30 23:55:16 -07:00
pcmcia
rdma
rxrpc
scsi	scsi: make sure that scsi_init_shared_tag_map() doesn't overwrite existing map	2008-10-27 19:25:30 +01:00
sound	Merge branches 'topic/fix/misc' and 'topic/fix/asoc' into for-linus	2008-10-30 14:26:24 +01:00
trace
video
xen
Kbuild