Diffusion FreeBSD src repository de898cb96042

x86 vdso gettc: reorganize ifunctions.
de898cb96042
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Description

x86 vdso gettc: reorganize ifunctions.

Instead of providing ifuncs for each kind of fence, define ifuncs
that combine fence and invocation of RDTSC. This refactoring makes
introduction of RDTSCP use possible.

Reviewed by: gallatin, markj
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D27986

Details

Provenance

kib	Authored on Jan 5 2021, 9:14 PM

Reviewer

gallatin

Differential Revision

D27986: x86 tsc: use RDTSCP in preference of fence + RDTSC

Parents

rG9e680e4005b7: tsc: add RDTSCP or faster variants of get_timecount()

Branches

Unknown

Tags

Unknown

Event Timeline

kib committed rGde898cb96042: x86 vdso gettc: reorganize ifunctions. (authored by kib).Jan 10 2021, 2:42 AM

kib added an edge: D27986: x86 tsc: use RDTSCP in preference of fence + RDTSC.

kib mentioned this in rGd1a6826939fb: x86 vdso gettc: reorganize ifunctions..Feb 9 2021, 8:37 AM

Changes (1)

Path

Size

lib/

libc/

x86/

sys/

__vdso_gettc.c

rGde898cb96042

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lib/libc/x86/sys/__vdso_gettc.c