freebsd-nq/sys/i386
Colin Percival 20d1a304b3 Reduce the Xen timecounter from 1GHz to 2^-9 GHz, thereby increasing the
timecounter period from 2^32 ns (~4.3s) to 2^41 ns (~36m39s).  Some time
sharing systems can skip clock interrupts for a few seconds when under
load (e.g., if we've recently used more than our fair share of CPU and
someone else wants a burst of CPU) and we were losing time in quanta of
2^32 ns due to timecounter wrapping.

Increasing the timecounter period up to 2^41 ns is definitely overkill,
but we still have microsecond timecounter precision, and anyone using
paravirtualized hardware when they need submicrosecond timing is crazy.
2010-12-11 22:33:33 +00:00
..
acpica MFamd64: (based on) r209957 2010-11-12 20:55:14 +00:00
bios Add compat shim for apm(4) to translate APM BIOS function numbers from i386 2010-11-11 19:20:33 +00:00
compile
conf Now userland POSIX semaphore is based on umtx. The kernel module 2010-09-24 09:04:16 +00:00
i386 When r207410 eliminated the acquisition and release of the page queues 2010-12-09 20:16:00 +00:00
ibcs2 Add macro DECLARE_MODULE_TIED to denote a module as requiring the 2010-10-12 09:18:17 +00:00
include Use int for 'tsc_present' instead of u_int. It is just a boolean. 2010-12-07 23:19:49 +00:00
isa Remove npxgetregs(), npxsetregs(), fpugetregs() and fpusetregs() 2010-11-26 14:50:42 +00:00
linux Add macro DECLARE_MODULE_TIED to denote a module as requiring the 2010-10-12 09:18:17 +00:00
pci Add device IDs for two more ServerWorks Host-PCI bridges so that we can 2010-11-25 15:42:33 +00:00
svr4 Change some movl's to mov's. Newer GAS no longer accept 'movl' instructions 2009-01-31 11:37:21 +00:00
xbox Update d_mmap() to accept vm_ooffset_t and vm_memattr_t. 2009-12-29 21:51:28 +00:00
xen Reduce the Xen timecounter from 1GHz to 2^-9 GHz, thereby increasing the 2010-12-11 22:33:33 +00:00
Makefile Update entries for building tags. 2007-05-13 18:21:54 +00:00