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Noah Goldstein 911c63a51c sysdeps: Add 'get_fast_jitter' interace in fast-jitter.h 
'get_fast_jitter' is meant to be used purely for performance
purposes. In all cases it's used it should be acceptable to get no
randomness (see default case). An example use case is in setting
jitter for retries between threads at a lock. There is a
performance benefit to having jitter, but only if the jitter can
be generated very quickly and ultimately there is no serious issue
if no jitter is generated.

The implementation generally uses 'HP_TIMING_NOW' iff it is
inlined (avoid any potential syscall paths).
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
 		2022-04-27 17:17:43 -05:00
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net Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
netinet Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
nfs Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
sys ttydefaults.h: Fix CSTATUS to control-t 2022-01-07 00:23:05 +01:00
Makefile Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
_G_config.h
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_itoa.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
a.out.h
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abort-instr.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
adaptive_spin_count.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
aio_misc.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
allocalim.h
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arch-fd_to_filename.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
asm-syntax.h
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atomic-machine.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
c++-types.data
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confstr.h
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crti.S
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crtn.S
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device-nrs.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dirstream.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-audit-check.h elf: Fix runtime linker auditing on aarch64 (BZ #26643) 2022-02-01 14:49:46 -03:00
dl-auxv.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-cache.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-debug.h elf: Add <dl-debug.h> 2022-01-03 05:16:03 -08:00
dl-dtprocnum.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-dtv.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-execve.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-fcntl.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-fileid.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-fixup-attribute.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-fptr.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-hash.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-hwcap-check.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-irel.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-isa-level.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-librecon.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-lookupcfg.h elf: Issue la_symbind for bind-now (BZ #23734) 2022-02-01 14:49:46 -03:00
dl-machine-rel.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-machine.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-minimal-malloc.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-mman.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-osinfo.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-procinfo.c
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dl-procinfo.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-procruntime.c
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dl-prop.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-protected.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-r_debug.h elf: Add <dl-r_debug.h> 2022-01-31 07:05:48 -08:00
dl-relocate-ld.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-sysdep.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tls.h
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dl-unistd.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-vdso-setup.c
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dl-vdso-setup.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-vdso.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dwarf2.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
elf-initfini.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
elf-read-prop.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
elf_machine_sym_no_match.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
elide.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
eloop-threshold.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
entry.h
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errqueue.h
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fast-jitter.h sysdeps: Add 'get_fast_jitter' interace in fast-jitter.h 2022-04-27 17:17:43 -05:00
fd_to_filename.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
features-time64.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
fenv_private.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
fips-private.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
fix-fp-int-compare-invalid.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
fix-fp-int-convert-overflow.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
fix-int-fp-convert-zero.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
float128-abi.h
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fork.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
fpu_control.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
framestate.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
gcc-compat.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
gccframe.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
get-rounding-mode.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
gmp-mparam.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
hp-timing-common.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
hp-timing.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifreq.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifunc-init.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifunc-sel.h
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internal-signals.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
intr-msg.h
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ld.abilist
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ldbl-classify-compat.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ldconfig.h elf: Fix 64 time_t support for installed statically binaries 2022-01-17 10:57:09 -03:00
ldsodefs.h elf: Remove unused enum allowmask 2022-04-25 01:01:02 -07:00
libBrokenLocale.abilist
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libanl.abilist
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libc-lock.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libc-mmap.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libc-mtag.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libc-start.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libc-symver.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libc-tsd.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libc.abilist
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libc_malloc_debug.abilist
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libc_start_call_main.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libcrypt.abilist
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libdl.abilist
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libm-alias-double.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libm-alias-float.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libm-alias-float128.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libm-alias-ldouble.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
libm-test-ulps
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libm-test-ulps-name
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libm.abilist
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libnsl.abilist
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libnss_compat.abilist
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libnss_nisplus.abilist
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libpthread.abilist
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libresolv.abilist
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librt.abilist
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libutil.abilist
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link_map.h
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linkmap.h
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local-setxid.h
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localplt.data
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machine-gmon.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
machine-lock.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
machine-sp.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
malloc-alignment.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
malloc-hugepages.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
malloc-hugepages.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
malloc-machine.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
malloc-size.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
malloc-sysdep.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-barriers.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-nan-payload-double.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-nan-payload-float.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-narrow-alias-float128.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-narrow-alias.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-arch.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-exceptions.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-rounding.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-snan-cast.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-snan-payload.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-snan.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-trap-force.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests-trap.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-tests.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-type-macros-double.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-type-macros-float.h math: Fix float conversion regressions with gcc-12 [BZ #28713] 2022-01-10 14:27:17 +00:00
math-type-macros-float128.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-type-macros-ldouble.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-type-macros.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math-use-builtins-ceil.h
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math-use-builtins-copysign.h
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math-use-builtins-floor.h
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math-use-builtins-fma.h
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math-use-builtins-fmax.h
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math-use-builtins-fmin.h
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math-use-builtins-nearbyint.h
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math-use-builtins-rint.h
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math-use-builtins-round.h
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math-use-builtins-roundeven.h
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math-use-builtins-sqrt.h
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math-use-builtins-trunc.h
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math-use-builtins.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
math_ldbl.h
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math_ldbl_opt.h
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math_private.h
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math_private_calls.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memcopy.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
mmap_info.h
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nan-high-order-bit.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
not-cancel.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
not-errno.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
nscd-types.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
pagecopy.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
paths.h
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profil-counter.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
pty-private.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
rtld-lowlevel.h
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rtld_static_init.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
safe-fatal.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
set-hooks-arch.h SET_RELHOOK: merge i386 and x86_64, and move to sysdeps/mach/hurd/x86 2022-02-01 20:08:25 +00:00
setjmpP.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
sigcontextinfo.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
siglist-compat.c
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siglist-compat.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
siglist.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
sigset-cvt-mask.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
sigsetops.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
single-thread.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
spawn_int_def.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
stackguard-macros.h
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stackinfo.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
stap-probe-machine.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
startup.h elf: Remove __libc_init_secure 2022-04-19 15:52:27 -07:00
stdio-lock.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
string_private.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
struct_stat_time64.h
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symbol-hacks.h
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sysdep-cancel.h
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sysdep.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
thread_state.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
time-clockid.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
time64-compat.h
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tininess.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tls-internal-struct.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tls-internal.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tls-internal.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tls-setup.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tls.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit.h
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tst-file-align.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unsecvars.h elf: Remove LD_USE_LOAD_BIAS 2022-02-10 09:18:15 -03:00
unwind-arch.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-dw2-fde-glibc.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-dw2-fde.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-dw2-fde.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-dw2.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-link.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-pe.c
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unwind-pe.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-resume.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind-resume.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
unwind.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
utmp-equal.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
xstatver.h
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