qiurui
/
glibc
mirror of git://sourceware.org/git/glibc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
glibc/sysdeps/x86_64
History
Sunil K Pandey 61f2272bc6 x86_64: Optimize ffsll function code size. 
Ffsll function randomly regress by ~20%, depending on how code gets
aligned in memory.  Ffsll function code size is 17 bytes.  Since default
function alignment is 16 bytes, it can load on 16, 32, 48 or 64 bytes
aligned memory.  When ffsll function load at 16, 32 or 64 bytes aligned
memory, entire code fits in single 64 bytes cache line.  When ffsll
function load at 48 bytes aligned memory, it splits in two cache line,
hence random regression.

Ffsll function size reduction from 17 bytes to 12 bytes ensures that it
will always fit in single 64 bytes cache line.

This patch fixes ffsll function random performance regression.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 9d94997b5f)
 		2024-02-08 09:00:17 -08:00
..
64
…
fpu Add libm_alias_finite for _finite symbols 2020-01-03 10:02:04 -03:00
multiarch x86: Fix wcsnlen-avx2 page cross length comparison [BZ #29591] 2022-11-24 17:15:54 -08:00
nptl Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
x32 Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
Implies
…
Makefile x86-64: Test strlen and wcslen with 0 in the RSI register [BZ #28064] 2022-02-01 12:23:36 -08:00
Versions Move __fentry__ version definition to sysdeps/{i386,x86_64} 2018-08-10 09:07:44 +02:00
____longjmp_chk.S
…
__longjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
_mcount.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
abort-instr.h
…
add_n.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
addmul_1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bsd-_setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bsd-setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
bzero.S
…
configure x86_64: Remove unneeded static PIE check for undefined weak diagnostic 2021-08-18 13:45:27 -07:00
configure.ac x86_64: Remove unneeded static PIE check for undefined weak diagnostic 2021-08-18 13:45:27 -07:00
crti.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
crtn.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-irel.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-machine.h x86: Check IFUNC definition in unrelocated executable [BZ #20019] 2021-01-13 14:02:11 -08:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-runtime.c
…
dl-tls.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tls.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tlsdesc.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-tlsdesc.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-trampoline.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
dl-trampoline.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ffsll.c x86_64: Optimize ffsll function code size. 2024-02-08 09:00:17 -08:00
htonl.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ifuncmain8.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
ifuncmod8.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
isa.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
l10nflist.c
…
ldbl2mpn.c
…
link-defines.sym
…
locale-defines.sym
…
localplt.data
…
lshift.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memchr.S x86: Fix overflow bug with wmemchr-sse2 and wmemchr-avx2 [BZ #27974] 2022-01-27 15:32:50 -08:00
memcmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memcpy.S
…
memcpy_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memmove.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memmove_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
mempcpy.S
…
mempcpy_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memrchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memset.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memset_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
memusage.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
mp_clz_tab.c
…
mul_1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
preconfigure
…
preconfigure.ac
…
rawmemchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
rshift.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
rtld-offsets.sym
…
sched_cpucount.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
setjmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
stack-aliasing.h
…
stackguard-macros.h
…
stackinfo.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
start.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
stpcpy.S
…
strcasecmp.S
…
strcasecmp_l-nonascii.c
…
strcasecmp_l.S
…
strcat.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strchrnul.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strcmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strcpy.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strcspn.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strlen.S x86-64: Move strlen.S to multiarch/strlen-vec.S 2022-01-27 15:43:25 -08:00
strncase.S
…
strncase_l-nonascii.c
…
strncase_l.S
…
strncmp.S
…
strnlen.S
…
strpbrk.S
…
strrchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
strspn.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sub_n.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
submul_1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
sysdep.h x86-64: Add AVX optimized string/memory functions for RTM 2022-01-27 11:40:18 -08:00
tls-macros.h
…
tls_get_addr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tlsdesc.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tlsdesc.sym
…
tst-audit.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-audit3.c
…
tst-audit4-aux.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-audit4.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-audit5.c
…
tst-audit6.c
…
tst-audit7.c
…
tst-audit10-aux.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-audit10.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-auditmod3a.c
…
tst-auditmod3b.c
…
tst-auditmod4a.c
…
tst-auditmod4b.c
…
tst-auditmod5a.c
…
tst-auditmod5b.c
…
tst-auditmod6a.c
…
tst-auditmod6b.c
…
tst-auditmod6c.c
…
tst-auditmod7a.c
…
tst-auditmod7b.c
…
tst-auditmod10a.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-auditmod10b.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-avx-aux.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-avx.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-avx512-aux.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-avx512.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-avx512mod.c
…
tst-avxmod.c
…
tst-mallocalign1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-platform-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-platformmod-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-platformmod-2.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-quad1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-quad1pie.c
…
tst-quad2.c
…
tst-quad2pie.c
…
tst-quadmod1.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-quadmod1pie.S
…
tst-quadmod2.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-quadmod2pie.S
…
tst-rsi-strlen.c x86-64: Test strlen and wcslen with 0 in the RSI register [BZ #28064] 2022-02-01 12:23:36 -08:00
tst-rsi-wcslen.c x86-64: Test strlen and wcslen with 0 in the RSI register [BZ #28064] 2022-02-01 12:23:36 -08:00
tst-split-dynreloc.c
…
tst-split-dynreloc.lds
…
tst-sse.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-ssemod.c
…
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-x86_64-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
tst-x86_64mod-1.c Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
wcschr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
wcscmp.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
wcslen.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
wcsrchr.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
wmemset.S
…
wmemset_chk.S Update copyright dates with scripts/update-copyrights. 2020-01-01 00:14:33 +00:00
wordcopy.c
…