freebsd-nq/sys/i386
Conrad Meyer 10386b56ad pmap_invalidate_range: For very large ranges, flush the whole TLB
Typical TLBs have 40-512 entries available.  At some point, iterating
every single page in a requested invalidation range and issuing invlpg
on it is more expensive than flushing the TLB and allowing it to reload
on demand.

Broadwell CPUs have 1536 L2 TLB entries, so I've picked the arbitrary
number 4096 entries as a hueristic at which point we flush TLB rather
than invalidating every single potential page.

Reviewed by:	alc
Feedback from:	jhb, kib
MFC notes:	Depends on r291688
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D4280
2015-12-06 17:39:13 +00:00
..
acpica If x86 CPU implementation of the MWAIT instruction reasonably 2015-05-09 12:28:48 +00:00
bios Pull in r267961 and r267973 again. Fix for issues reported will follow. 2014-06-28 03:56:17 +00:00
conf Disconnect iBCS2 emulator from the build. The ibcs2 option, the build 2015-11-28 08:31:32 +00:00
i386 pmap_invalidate_range: For very large ranges, flush the whole TLB 2015-12-06 17:39:13 +00:00
ibcs2 Replace struct filedesc argument in getvnode with struct thread 2015-06-16 13:09:18 +00:00
include For amd64 non-PCID machines, and for i386 machines with support for 2015-12-03 11:14:14 +00:00
isa Convert between abridged (from FXSAVE) and unabridged (from FSAVE) 2015-07-10 09:20:13 +00:00
linux Remove sv_prepsyscall, sv_sigsize and sv_sigtbl members of the struct 2015-11-28 08:49:07 +00:00
pci Remove support for Xen PV domU kernels. Support for HVM domU kernels 2015-04-30 15:48:48 +00:00
svr4 MFamd64: Move extern declaration of _ucodesel and _udatasel to 2014-11-02 21:40:32 +00:00
xbox After r261980, the local ptr variable in xbox_init() is no longer used, 2014-02-16 22:48:36 +00:00
Makefile