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13a9f42818
freebsd-skq/lib/libc/amd64/sys
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kib 13a9f42818 Use struct vdso_timehands data to implement fast gettimeofday(2) and 
clock_gettime(2) functions if supported. The speedup seen in
microbenchmarks is in range 4x-7x depending on the hardware.

Only amd64 and i386 architectures are supported. Libc uses rdtsc and
kernel data to calculate current time, if enabled by kernel.

Hopefully, this code is going to migrate into vdso in some future.

Discussed with:	bde
Reviewed by:	jhb
Tested by:	flo
MFC after:	1 month
2012-06-22 07:13:30 +00:00
..
__vdso_gettc.c Use struct vdso_timehands data to implement fast gettimeofday(2) and 2012-06-22 07:13:30 +00:00
amd64_get_fsbase.c
amd64_get_gsbase.c
amd64_set_fsbase.c
amd64_set_gsbase.c
brk.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
cerror.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
exect.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
getcontext.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
Makefile.inc Use struct vdso_timehands data to implement fast gettimeofday(2) and 2012-06-22 07:13:30 +00:00
pipe.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
ptrace.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
reboot.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
sbrk.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
setlogin.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
sigreturn.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00
vfork.S Add section .note.GNU-stack for assembly files used by 386 and amd64. 2011-01-07 16:08:40 +00:00