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7f03c419bc
freebsd-dev/sys
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Maxim Sobolev 7f03c419bc Default HZ value (1,000) on i386/amd64 is not very virtual machine friendly. 
Due to the nature of the beast it causes lot of unproductive overhead. This
is especially bad when running SMP kernel on VMWare with several virtual
processors - idle FreeBSD guest with SMP kernel takes 150% host CPU time on my
dual-core MacBook Pro when I am enabling two virtual CPUs, making even host
not very usable. Detect when we are running in the sandbox and reduce HZ
to 10 (can be adjusted via VM_HZ in the kernel config) in such cases. This
brings host CPU usage of idle FreeBSD/SMP on two virtual processors down
to 10%.

Detect most popular VM platforms out there - VMWare, Parallels, VirtualBox
and VirtualPC.

MFC after:	2 weeks
2008-10-27 06:25:02 +00:00
..
amd64 Fix division by zero panic if kern.hz less than 32. 2008-10-26 18:58:04 +00:00
arm - Add stream bus_space operations. 2008-10-26 22:53:59 +00:00
boot Initial support of loader(8) for ARM machines running U-Boot. 2008-10-14 10:11:14 +00:00
bsm When MPSAFE ttys were merged, a new BSM audit event identifier was 2008-08-24 21:20:35 +00:00
cam Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
cddl Remove the struct thread unuseful argument from bufobj interface. 2008-10-10 21:23:50 +00:00
compat Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
conf Add ADB support. This provides support for the external ADB bus on the PowerMac 2008-10-26 19:37:38 +00:00
contrib Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
crypto Simplify session selection/allocation. 2008-08-09 20:01:01 +00:00
ddb Collect N identical (or near identical) mkdumpheader() implementations into 2008-10-01 22:08:53 +00:00
dev Add ADB support. This provides support for the external ADB bus on the PowerMac 2008-10-26 19:37:38 +00:00
fs Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
gdb Commit SYSINIT() ;-adding patch missed in previous pass. 2008-03-16 13:02:04 +00:00
geom - Import macros used in gmirror for printing gvinum debug messages and making 2008-10-26 17:20:37 +00:00
gnu Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
i386 Fix division by zero panic if kern.hz less than 32. 2008-10-26 18:58:04 +00:00
ia64 Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
isa MFp4 (my newcard tree): 2008-08-24 07:40:14 +00:00
kern Default HZ value (1,000) on i386/amd64 is not very virtual machine friendly. 2008-10-27 06:25:02 +00:00
libkern Prefix the static shl function with '__' like its parent function __qdivrem to 2008-10-09 20:43:42 +00:00
mips Add mips/conf/DEFAULTS and populate it with: 2008-10-23 02:16:38 +00:00
modules After adding U3G_DEBUG to LINT we need to create the opt_u3g.h file when 2008-10-24 07:19:09 +00:00
net Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
net80211 o re-enable a lock assert 2008-10-26 21:59:07 +00:00
netatalk Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
netgraph Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
netinet In both dropwithreset paths in tcp_input.c, drop the tcbinfo lock 2008-10-26 22:03:52 +00:00
netinet6 Add a MAC label, MAC Framework, and MAC policy entry points for IPv6 2008-10-26 22:45:18 +00:00
netipsec Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
netipx Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
netnatm Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
netncp Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
netsmb Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
nfs Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
nfs4client Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
nfsclient Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
nfsserver Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
nlm Rename RPC's 'struct pmap' to 'struct portmap' to avoid confusing it with 2008-08-25 09:36:17 +00:00
opencrypto Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
pc98 Replace all calls to minor() with dev2unit(). 2008-09-27 08:51:18 +00:00
pccard
pci Implement miibus_statchg handler. It detects whether rl(4) 2008-10-25 03:41:36 +00:00
powerpc Add support for kernel profiling for both AIM and BookE. 2008-10-27 02:36:03 +00:00
rpc Retire the MALLOC and FREE macros. They are an abomination unto style(9). 2008-10-23 15:53:51 +00:00
security Implement MAC policy support for IPv6 fragment reassembly queues, 2008-10-26 22:46:37 +00:00
sparc64 Enable mpt(4) as some later models have on-board Fusion-MPT 2008-10-11 12:10:23 +00:00
sun4v Collect N identical (or near identical) mkdumpheader() implementations into 2008-10-01 22:08:53 +00:00
sys Add a driver for flash memory that implements to the Common Flash 2008-10-25 06:18:12 +00:00
tools Introduce a standalone shell script for embedding MFS image. 2008-02-05 10:46:30 +00:00
ufs Fix a number of style issues in the MALLOC / FREE commit. I've tried to 2008-10-23 20:26:15 +00:00
vm Update mmap() comment: no more block devices, so no more block device 2008-10-22 16:50:12 +00:00
xdr Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00
xen Fix evtchn initialization on SMP 2008-10-24 07:57:48 +00:00
Makefile Improve the glimpse target: don't index .svn and compile directories. 2008-08-15 14:11:30 +00:00