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glibc/sysdeps/x86_64
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Sunil K Pandey 1a3326df93 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)
2024-01-31 18:53:26 -08:00
..
64
fpu x86_64: Fix asm constraints in feraiseexcept (bug 30305) 2023-04-24 15:34:29 +02:00
multiarch x86: Fix wcsnlen-avx2 page cross length comparison [BZ #29591] 2022-11-24 14:26:47 -08:00
nptl nptl: Add backoff mechanism to spinlock loop 2022-09-28 07:29:49 -07:00
x32 Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
____longjmp_chk.S
__longjmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
_mcount.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
abort-instr.h
add_n.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
addmul_1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
bsd-_setjmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
bsd-setjmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
configure elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) 2021-10-11 11:14:02 -07:00
configure.ac elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) 2021-10-11 11:14:02 -07:00
crti.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
crtn.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-hwcaps-subdirs.c 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-machine.h x86-64: Ignore r_addend for R_X86_64_GLOB_DAT/R_X86_64_JUMP_SLOT 2022-07-18 09:06:45 -07:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-runtime.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tls.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tls.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tlsdesc.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-tlsdesc.S x86-64: Fix the tcb field load for x32 [BZ #31185] 2023-12-23 07:50:29 -08:00
dl-trampoline.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
dl-trampoline.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ffs.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ffsll.c x86_64: Optimize ffsll function code size. 2024-01-31 18:53:26 -08:00
htonl.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifuncmain8.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
ifuncmod8.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
Implies Remove dbl-64/wordsize-64 (part 2) 2021-01-07 15:26:26 +00:00
isa.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
l10nflist.c
link-defines.sym elf: Remove Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) 2021-10-11 11:14:02 -07:00
locale-defines.sym
localplt.data mtrace: Wean away from malloc hooks 2021-07-22 18:38:06 +05:30
lshift.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
machine-gmon.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
Makefile x86-64: Remove compiler -mavx512f check 2021-08-24 07:05:35 -07:00
memchr.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memcmp.S x86: Prevent SIGSEGV in memcmp-sse2 when data is concurrently modified [BZ #29863] 2023-01-13 17:19:29 -08:00
memcmpeq.S x86: Optimize memcmp SSE2 in memcmp.S 2022-05-16 12:19:59 -07:00
memcpy_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memcpy.S
memmove_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memmove.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
mempcpy_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
mempcpy.S
memrchr.S x86: Optimize memrchr-sse2.S 2022-07-18 11:32:53 -07:00
memset_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
memset.S x86_64: Remove bzero optimization 2022-07-18 08:58:54 -07:00
mp_clz_tab.c
mul_1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
preconfigure
preconfigure.ac
rawmemchr.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
rshift.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
rtld-offsets.sym
setjmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
stackguard-macros.h
stackinfo.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
start.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
stpcpy.S
strcasecmp_l-nonascii.c
strcasecmp_l.S
strcasecmp.S
strcat.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
strchr.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
strchrnul.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
strcmp.S x86: Optimize str{n}casecmp TOLOWER logic in strcmp.S 2022-05-16 11:56:16 -07:00
strcpy.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
strlen.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
strncase_l-nonascii.c
strncase_l.S
strncase.S
strncmp.S
strnlen.S
strrchr.S x86: Optimize {str|wcs}rchr-sse2 2022-05-16 12:37:03 -07:00
sub_n.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
submul_1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
sysdep.h x86: ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST expect no transactions 2022-07-18 11:40:07 -07:00
tls_get_addr.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tlsdesc.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tlsdesc.sym
tst-audit3.c
tst-audit4-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit4.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit5.c
tst-audit6.c
tst-audit7.c
tst-audit10-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit10.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-audit.h Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
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 2022-01-01 11:40:24 -08:00
tst-auditmod10b.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx512-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx512.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx512mod.c
tst-avx-aux.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avx.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-avxmod.c
tst-glibc-hwcaps.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-platform-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-platformmod-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-platformmod-2.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quad1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quad1pie.c
tst-quad2.c
tst-quad2pie.c
tst-quadmod1.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quadmod1pie.S
tst-quadmod2.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-quadmod2pie.S
tst-rsi-strlen.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-rsi-wcslen.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-split-dynreloc.c
tst-split-dynreloc.lds
tst-sse.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-ssemod.c
tst-x86_64-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-x86_64mod-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
tst-x86-64-tls-1.c Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
Versions
wcschr.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
wcscmp.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
wcslen.S x86: Small improvements for wcslen 2022-05-16 12:17:42 -07:00
wcsrchr.S x86: Optimize {str|wcs}rchr-sse2 2022-05-16 12:37:03 -07:00
wmemcmp.S x86: Fix missing __wmemcmp def for disable-multiarch build 2022-05-16 12:31:39 -07:00
wmemset_chk.S Update copyright dates with scripts/update-copyrights 2022-01-01 11:40:24 -08:00
wmemset.S
wordcopy.c