Alexander Motin 36acfc6507 Rework CPU load balancing in SCHED_ULE: ... - In sched_pickcpu() be more careful taking previous CPU on SMT systems. Do it only if all other logical CPUs of that physical one are idle to avoid extra resource sharing. - In sched_pickcpu() change general logic of CPU selection. First look for idle CPU, sharing last level cache with previously used one, skipping SMT CPU groups. If none found, search all CPUs for the least loaded one, where the thread with its priority can run now. If none found, search just for the least loaded CPU. - Make cpu_search() compare lowest/highest CPU load when comparing CPU groups with equal load. That allows to differentiate 1+1 and 2+0 loads. - Make cpu_search() to prefer specified (previous) CPU or group if load is equal. This improves cache affinity for more complicated topologies. - Randomize CPU selection if above factors are equal. Previous code tend to prefer CPUs with lower IDs, causing unneeded collisions. - Rework periodic balancer in sched_balance_group(). With cpu_search() more intelligent now, make balansing process flat, removing recursion over the topology tree. That fixes double swap problem and makes load distribution more even and predictable. All together this gives 10-15% performance improvement in many tests on CPUs with SMT, such as Core i7, for number of threads is less then number of logical CPUs. In some tests it also gives positive effect to systems without SMT. Reviewed by: jeff Tested by: flo, hackers@ MFC after: 1 month Sponsored by: iXsystems, Inc.		2012-02-27 10:31:54 +00:00
..
amd64	Refine r231791. Install the resume event handler unconditionally.	2012-02-16 22:28:17 +00:00
arm	Add C11 macros describing subnormal numbers to float.h.	2012-01-23 06:36:41 +00:00
boot	Whitespace cleanup:	2012-02-25 15:21:43 +00:00
bsm
cam	Use a better way to silence unneeded internal declaration warnings in	2012-02-23 21:34:14 +00:00
cddl	Analogous to r232059, add a parameter for the ZFS file system:	2012-02-26 16:30:39 +00:00
compat	Fix found places where uio_resid is truncated to int.	2012-02-21 01:05:12 +00:00
conf	Add backlight control to ATI-graphics PowerBooks and iBooks.	2012-02-26 13:45:25 +00:00
contrib	IFC @231845	2012-02-17 00:27:48 +00:00
crypto	Add support for the extended FPU states on amd64, both for native	2012-01-21 17:45:27 +00:00
ddb	Use strchr() and strrchr().	2012-01-02 12:12:10 +00:00
dev	Fix logic error	2012-02-27 08:57:02 +00:00
fs	Remove an unused structure and unnecessary cast	2012-02-24 07:30:44 +00:00
gdb	kern cons: introduce infrastructure for console grabbing by kernel	2011-12-17 15:08:43 +00:00
geom	If nested scheme allows dump kernel to its partition, we may allow	2012-02-20 06:35:52 +00:00
gnu/fs	Use new OSS-based BSD-licensed header for cs sound driver.	2012-02-01 21:38:01 +00:00
i386	Do not write to the user address directly, use suword().	2012-02-25 01:33:39 +00:00
ia64	Rev. 228360 moved the call to cpu_set_upcall() to happen before	2012-02-08 04:05:38 +00:00
isa	- There's no need to overwrite the default device method with the default	2011-11-22 21:28:20 +00:00
kern	Rework CPU load balancing in SCHED_ULE:	2012-02-27 10:31:54 +00:00
kgssapi
libkern	Implement extensions on top of standards instead of the other way around.	2012-01-03 07:05:30 +00:00
mips	Refctor address assignment for Octeon's ethernet ports:	2012-02-22 01:30:25 +00:00
modules	Fix the scc(4) module build. Without the file it's missing a required symbol.	2012-02-26 13:27:22 +00:00
net	Only look for a usable MAC address for the bridge ID from ports within our	2012-02-24 17:50:36 +00:00
net80211	Hold IF_LOCK when manipulating the interface flags.	2012-02-24 05:40:36 +00:00
netatalk	Convert all users of IF_ADDR_LOCK to use new locking macros that specify	2012-01-05 19:00:36 +00:00
netgraph	Revert r231829, that was my braino.	2012-02-22 09:08:51 +00:00
netinet	When using flowtable llentrys can outlive the interface with which they're associated	2012-02-23 18:21:37 +00:00
netinet6	In selectroute() add a missing fibnum argument to an in6_rtalloc()	2012-02-24 20:06:04 +00:00
netipsec	Add multi-FIB IPv6 support to the core network stack supplementing	2012-02-03 13:08:44 +00:00
netipx	Convert all users of IF_ADDR_LOCK to use new locking macros that specify	2012-01-05 19:00:36 +00:00
netnatm
netncp	Change ncp_scan_bindery_object() to pass a constant search string.	2011-10-16 08:44:03 +00:00
netsmb	Add unicode support to msdosfs and smbfs; original pathes from imura,	2011-11-18 03:05:20 +00:00
nfs	Add multi-FIB IPv6 support to the core network stack supplementing	2012-02-03 13:08:44 +00:00
nfsclient	Adjust the nfs_skip_wcc_data_onerr setting so that it does not block	2012-02-24 17:26:06 +00:00
nfsserver	Honor NFSv3 commit call (RFC 1813, Section 3.3.21) where when count is 0,	2011-12-15 02:26:53 +00:00
nlm	jwd@ reported a problem via email to freebsd-fs@ on Aug 25, 2011	2012-01-31 02:11:05 +00:00
ofed	Remove spurious 8bit chars, turning files into plain ASCII.	2012-01-15 13:23:54 +00:00
opencrypto
pc98	Remove full debugger options and enable KDB_TRACE option instead to decrease	2012-02-09 14:15:56 +00:00
pci	Use correct Config registers for RTL8139 family. Unlike RTL8168 and	2012-02-25 04:54:51 +00:00
powerpc	Add backlight control to ATI-graphics PowerBooks and iBooks.	2012-02-26 13:45:25 +00:00
rpc	Both a crash reported on freebsd-current on Oct. 18 under the	2011-11-03 14:38:03 +00:00
security	Remove direct access to si_name.	2012-02-10 12:35:57 +00:00
sparc64	As it turns out r227960 may still be insufficient with PREEMPTION	2012-01-28 22:42:33 +00:00
sys	Analogous to r232059, add a parameter for the ZFS file system:	2012-02-26 16:30:39 +00:00
teken
tools	Make vnode_if.awk parse vnode operations with underscores, like VOP_FOO_BAR.	2012-02-21 19:35:59 +00:00
ufs	Properly lock DQREF() with dqhlock. Missed locking caused counter	2012-02-22 20:03:51 +00:00
vm	Simplify vm_mmap()'s control flow.	2012-02-25 21:06:39 +00:00
x86	Fix apparent logic reversal in setting the 'auto_mode' flag.	2012-02-26 21:24:27 +00:00
xdr
xen	Fix "_" vs. "-" typo in a comment. No functional changes.	2012-02-16 21:47:17 +00:00
Makefile	Improve the cscope target's handling of MD directories. Automatically	2012-01-03 17:31:27 +00:00