I can reproduce the bug on a local system with the attached reproducer:
wesley@glibc-jammy:~$ apt-cache policy libc6
libc6:
Installed: 2.35-0ubuntu3.11
Candidate: 2.35-0ubuntu3.11
Version table:
*** 2.35-0ubuntu3.11 500
500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
100 /var/lib/dpkg/status
2.35-0ubuntu3 500
500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 65.088057
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 69.766305
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 62.821834
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 65.807690
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 1949.944540
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 1792.266083
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 1785.785353
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 2373.913114
### Verification Done Jammy ###
The build-time test suite passed.
The autopkgtest excuses report is clear.
wesley@glibc-jammy:~$ apt-cache policy libc6
libc6:
Installed: 2.35-0ubuntu3.12
Candidate: 2.35-0ubuntu3.12
Version table:
*** 2.35-0ubuntu3.12 500
500 http://archive.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
100 /var/lib/dpkg/status
2.35-0ubuntu3.11 500
500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
2.35-0ubuntu3 500
500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 61.100255
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 66.433792
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 65.547364
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 false false
nr_cpu: 24 pin: no fix: no
thread average (ms): 61.842890
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 62.259289
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 65.616804
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 64.859172
wesley@glibc-jammy:~$ ./test-glibc-malloc 24 true false
nr_cpu: 24 pin: yes fix: no
thread average (ms): 61.196404
### Verification Done Jammy ###
** Tags removed: verification-needed verification-needed-jammy
** Tags added: verification-done verification-done-jammy
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https://bugs.launchpad.net/bugs/2089789
Title:
malloc performance degradation with CPU affinity masks
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