diff --git a/AArch64-Update-A64FX-memset-not-to-degrade-at-16KB.patch b/AArch64-Update-A64FX-memset-not-to-degrade-at-16KB.patch
new file mode 100644
index 0000000000000000000000000000000000000000..f7ce84d2d510140196eab38d24c48361bbc93f2f
--- /dev/null
+++ b/AArch64-Update-A64FX-memset-not-to-degrade-at-16KB.patch
@@ -0,0 +1,39 @@
+From 23777232c23f80809613bdfa329f63aadf992922 Mon Sep 17 00:00:00 2001
+From: Naohiro Tamura via Libc-alpha <libc-alpha@sourceware.org>
+Date: Fri, 27 Aug 2021 05:03:04 +0000
+Subject: [PATCH] AArch64: Update A64FX memset not to degrade at 16KB
+
+This patch updates unroll8 code so as not to degrade at the peak
+performance 16KB for both FX1000 and FX700.
+
+Inserted 2 instructions at the beginning of the unroll8 loop,
+cmp and branch, are a workaround that is found heuristically.
+
+Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
+---
+ sysdeps/aarch64/multiarch/memset_a64fx.S | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/sysdeps/aarch64/multiarch/memset_a64fx.S b/sysdeps/aarch64/multiarch/memset_a64fx.S
+index 7bf759b..f7dfdaa 100644
+--- a/sysdeps/aarch64/multiarch/memset_a64fx.S
++++ b/sysdeps/aarch64/multiarch/memset_a64fx.S
+@@ -96,7 +96,14 @@ L(vl_agnostic): // VL Agnostic
+ L(unroll8):
+ 	sub	count, count, tmp1
+ 	.p2align 4
+-1:	st1b_unroll 0, 7
++	// The 2 instructions at the beginning of the following loop,
++	// cmp and branch, are a workaround so as not to degrade at
++	// the peak performance 16KB.
++	// It is found heuristically and the branch condition, b.ne,
++	// is chosen intentionally never to jump.
++1:	cmp	xzr, xzr
++	b.ne	1b
++	st1b_unroll 0, 7
+ 	add	dst, dst, tmp1
+ 	subs	count, count, tmp1
+ 	b.hi	1b
+-- 
+1.8.3.1
+
diff --git a/glibc.spec b/glibc.spec
index 275f792ce958fdd626a2ba1a727e34b1198624f0..80db7b85202dc7e0af499ff22f57f870ae578ae3 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -65,7 +65,7 @@
 ##############################################################################
 Name: 	 	glibc
 Version: 	2.34
-Release: 	18
+Release: 	19
 Summary: 	The GNU libc libraries
 License:	%{all_license}
 URL: 		http://www.gnu.org/software/glibc/
@@ -118,6 +118,7 @@ Patch31: mtrace-Fix-output-with-PIE-and-ASLR-BZ-22716.patch
 Patch32: rtld-copy-terminating-null-in-tunables_strdup-bug-28.patch
 Patch33: Use-__executable_start-as-the-lowest-address-for-pro.patch
 Patch34: x86-64-Use-testl-to-check-__x86_string_control.patch
+Patch35: AArch64-Update-A64FX-memset-not-to-degrade-at-16KB.patch
 
 #Patch9000: turn-REP_STOSB_THRESHOLD-from-2k-to-1M.patch
 Patch9001: delete-no-hard-link-to-avoid-all_language-package-to.patch 
@@ -1307,6 +1308,9 @@ fi
 %endif
 
 %changelog
+* Fri Oct 29 2021 Qingqing Li<liqingqing3@huawei.com> - 2.34-19
+- aarch64: update a64fx memset not to degrade at 16KB
+
 * Thu Oct 28 2021 Qingqing Li<liqingqing3@huawei.com> - 2.34-18
 - use testl instead of andl to check __x86_string_control to
   avoid updating __x86_string_control