Verified with 2.27-3ubuntu1.3 on Bionic. ubuntu@ip-172-31-33-219:~$ dpkg -l libc6 libc6-lse | cat dpkg-query: no packages found matching libc6-lse Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-==============-===============-============-================================= ii libc6:arm64 2.27-3ubuntu1.3 arm64 GNU C Library: Shared libraries ubuntu@ip-172-31-33-219:~$ strace -eopenat ls openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libpcre.so.3", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/proc/filesystems", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/aarch64-linux-gnu/gconv/gconv-modules.cache", O_RDONLY) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MEASUREMENT", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_TELEPHONE", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_ADDRESS", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_NAME", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_PAPER", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MESSAGES", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MESSAGES/SYS_LC_MESSAGES", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MONETARY", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_COLLATE", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_TIME", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_NUMERIC", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_CTYPE", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 a.c a.out +++ exited with 0 +++ ubuntu@ip-172-31-33-219:~$ gcc -O2 -o a.out a.c -lpthread -DITER=1000 -DTHREADS=64 ubuntu@ip-172-31-33-219:~$ ./a.out thread 0: min=128, max=202622080, average=136215.531250, mutexes_locked=10663, flips=0 thread 1: min=128, max=285471840, average=17960.134766, mutexes_locked=78401, flips=1 thread 2: min=128, max=195449376, average=80376.078125, mutexes_locked=17194, flips=1 thread 3: min=128, max=265049664, average=12830.956055, mutexes_locked=103458, flips=0 thread 4: min=128, max=382705952, average=16430.542969, mutexes_locked=72433, flips=0 thread 5: min=128, max=217932064, average=14540233.000000, mutexes_locked=93, flips=0 thread 6: min=128, max=219085888, average=70205.203125, mutexes_locked=17430, flips=0 thread 7: min=128, max=265637312, average=32240.302734, mutexes_locked=39906, flips=0 thread 8: min=128, max=171533056, average=18359.027344, mutexes_locked=69059, flips=0 thread 9: min=128, max=390047232, average=68779.570312, mutexes_locked=21468, flips=0 thread 10: min=128, max=210032352, average=4176407.250000, mutexes_locked=354, flips=1 thread 11: min=128, max=303787296, average=22163.617188, mutexes_locked=64889, flips=0 thread 12: min=128, max=343074752, average=47846.933594, mutexes_locked=30841, flips=0 thread 13: min=128, max=202920768, average=28269.964844, mutexes_locked=51255, flips=2 thread 14: min=128, max=194553152, average=24361.039062, mutexes_locked=59795, flips=2 thread 15: min=128, max=296455584, average=97139.250000, mutexes_locked=13318, flips=1 thread 16: min=128, max=264621664, average=46561.179688, mutexes_locked=29095, flips=3 thread 17: min=128, max=265127680, average=11381.584961, mutexes_locked=121063, flips=1 thread 18: min=128, max=281418848, average=34689.199219, mutexes_locked=37234, flips=1 thread 19: min=128, max=171594784, average=103475.148438, mutexes_locked=13929, flips=3 thread 20: min=128, max=280893504, average=46895.488281, mutexes_locked=29550, flips=0 thread 21: min=128, max=203348224, average=98628.250000, mutexes_locked=14381, flips=1 thread 22: min=128, max=202185280, average=1178475.000000, mutexes_locked=900, flips=1 thread 23: min=128, max=218387936, average=109334.750000, mutexes_locked=13400, flips=961 thread 24: min=128, max=327741280, average=14713702.000000, mutexes_locked=88, flips=0 thread 25: min=128, max=296289632, average=51559.507812, mutexes_locked=28390, flips=0 thread 26: min=128, max=327571072, average=20917.150391, mutexes_locked=67945, flips=1 thread 27: min=128, max=296373600, average=7844082.000000, mutexes_locked=167, flips=1 thread 28: min=128, max=421409984, average=24436.640625, mutexes_locked=58824, flips=0 thread 29: min=128, max=374428416, average=22664.373047, mutexes_locked=62406, flips=1 thread 30: min=128, max=218332000, average=18031018.000000, mutexes_locked=80, flips=0 thread 31: min=128, max=265216704, average=8871683.000000, mutexes_locked=160, flips=0 thread 32: min=128, max=171492512, average=37041.085938, mutexes_locked=35292, flips=0 thread 33: min=128, max=242293440, average=22668.140625, mutexes_locked=63912, flips=0 thread 34: min=128, max=249929568, average=35306.703125, mutexes_locked=35472, flips=0 thread 35: min=128, max=156202368, average=88255.375000, mutexes_locked=14304, flips=0 thread 36: min=128, max=211019584, average=44352.406250, mutexes_locked=30008, flips=0 thread 37: min=128, max=358924224, average=49087.457031, mutexes_locked=27600, flips=1 thread 38: min=128, max=296413632, average=46659.050781, mutexes_locked=29735, flips=0 thread 39: min=128, max=257856000, average=20518.306641, mutexes_locked=66627, flips=1 thread 40: min=128, max=155998016, average=14021.840820, mutexes_locked=73050, flips=2 thread 41: min=128, max=226665504, average=31297.167969, mutexes_locked=43302, flips=0 thread 42: min=128, max=211103072, average=22528.082031, mutexes_locked=63788, flips=0 thread 43: min=128, max=171350752, average=901092.812500, mutexes_locked=1445, flips=1 thread 44: min=128, max=242238464, average=93425.960938, mutexes_locked=13592, flips=0 thread 45: min=128, max=280459552, average=37028.617188, mutexes_locked=33627, flips=0 thread 46: min=128, max=272890112, average=17198.107422, mutexes_locked=83455, flips=1 thread 47: min=128, max=311986656, average=66256.562500, mutexes_locked=20692, flips=0 thread 48: min=128, max=218158720, average=9965.125000, mutexes_locked=131929, flips=0 thread 49: min=128, max=202931200, average=19828.449219, mutexes_locked=57188, flips=0 thread 50: min=128, max=328106880, average=18321.082031, mutexes_locked=72887, flips=0 thread 51: min=128, max=312036512, average=16550.621094, mutexes_locked=87198, flips=1 thread 52: min=128, max=241812160, average=22006.316406, mutexes_locked=65670, flips=0 thread 53: min=128, max=265257440, average=12535.343750, mutexes_locked=115069, flips=0 thread 54: min=128, max=218277088, average=17168.166016, mutexes_locked=76369, flips=2 thread 55: min=128, max=296524192, average=78772.531250, mutexes_locked=18466, flips=1 thread 56: min=128, max=234082208, average=31224.683594, mutexes_locked=44888, flips=0 thread 57: min=128, max=233833376, average=2102463.000000, mutexes_locked=690, flips=3 thread 58: min=128, max=218189536, average=99991.265625, mutexes_locked=13872, flips=0 thread 59: min=128, max=179917504, average=13216.059570, mutexes_locked=103756, flips=0 thread 60: min=128, max=327572416, average=24879.900391, mutexes_locked=58795, flips=3 thread 61: min=128, max=273512128, average=17095430.000000, mutexes_locked=78, flips=0 thread 62: min=128, max=140950752, average=48152.300781, mutexes_locked=29432, flips=0 thread 63: min=128, max=600201408, average=30847.994141, mutexes_locked=43875, flips=2 server: min=128, max=226092832, average=26893.224609, mutexes_locked=54646, flips=1000 ubuntu@ip-172-31-33-219:~$ time ./a.out thread 0: min=128, max=202775552, average=36288.757812, mutexes_locked=45221, flips=0 thread 1: min=128, max=249545632, average=18736.197266, mutexes_locked=77080, flips=0 thread 2: min=128, max=187151776, average=25841.167969, mutexes_locked=63792, flips=1 thread 3: min=128, max=265305504, average=24874.847656, mutexes_locked=64383, flips=0 thread 4: min=128, max=187774624, average=16987.982422, mutexes_locked=87232, flips=1 thread 5: min=128, max=225252192, average=64116.804688, mutexes_locked=26000, flips=0 thread 6: min=128, max=195055040, average=23934.007812, mutexes_locked=61052, flips=1 thread 7: min=128, max=218444064, average=16034.120117, mutexes_locked=103665, flips=0 thread 8: min=128, max=194077280, average=16474.224609, mutexes_locked=97966, flips=1 thread 9: min=128, max=250248096, average=49201.113281, mutexes_locked=30219, flips=0 thread 10: min=128, max=359090560, average=95415.140625, mutexes_locked=15355, flips=1 thread 11: min=128, max=156381824, average=26091.261719, mutexes_locked=57796, flips=1 thread 12: min=128, max=375016736, average=58106.355469, mutexes_locked=28412, flips=0 thread 13: min=128, max=234046720, average=45886.246094, mutexes_locked=35965, flips=0 thread 14: min=128, max=412859392, average=258444.734375, mutexes_locked=6456, flips=0 thread 15: min=128, max=280137120, average=109022.507812, mutexes_locked=15016, flips=0 thread 16: min=128, max=171764416, average=18462.046875, mutexes_locked=76517, flips=0 thread 17: min=128, max=140576096, average=18356.292969, mutexes_locked=75289, flips=0 thread 18: min=128, max=218478784, average=49404.136719, mutexes_locked=30576, flips=1 thread 19: min=128, max=234092576, average=35604.839844, mutexes_locked=44814, flips=0 thread 20: min=128, max=264803360, average=21737.238281, mutexes_locked=67198, flips=0 thread 21: min=128, max=233360864, average=29054.957031, mutexes_locked=56213, flips=0 thread 22: min=128, max=162820832, average=33043.156250, mutexes_locked=45457, flips=0 thread 23: min=128, max=249392544, average=43956.167969, mutexes_locked=37192, flips=0 thread 24: min=128, max=218525120, average=48978.308594, mutexes_locked=30206, flips=0 thread 25: min=128, max=234462464, average=103251.859375, mutexes_locked=15954, flips=1 thread 26: min=128, max=256805984, average=100495.812500, mutexes_locked=15510, flips=0 thread 27: min=128, max=187185600, average=173422.140625, mutexes_locked=8273, flips=1 thread 28: min=128, max=327769536, average=72212.500000, mutexes_locked=22656, flips=0 thread 29: min=128, max=194288224, average=16337.498047, mutexes_locked=98801, flips=0 thread 30: min=128, max=232900736, average=49341.312500, mutexes_locked=29501, flips=0 thread 31: min=128, max=226768032, average=40821.546875, mutexes_locked=33942, flips=0 thread 32: min=128, max=390249504, average=43526.609375, mutexes_locked=37204, flips=1 thread 33: min=128, max=311526880, average=109124.171875, mutexes_locked=15001, flips=0 thread 34: min=128, max=265392768, average=35110.378906, mutexes_locked=46833, flips=0 thread 35: min=128, max=156003456, average=38188.652344, mutexes_locked=38313, flips=0 thread 36: min=128, max=280347168, average=15906.828125, mutexes_locked=88740, flips=0 thread 37: min=128, max=281357344, average=22497.488281, mutexes_locked=73018, flips=1 thread 38: min=128, max=295997216, average=23829.187500, mutexes_locked=68932, flips=982 thread 39: min=128, max=343198880, average=23815.556641, mutexes_locked=68548, flips=1 thread 40: min=128, max=265188384, average=35697.222656, mutexes_locked=45350, flips=0 thread 41: min=128, max=405704448, average=182765.171875, mutexes_locked=8020, flips=0 thread 42: min=128, max=218719872, average=25703.791016, mutexes_locked=59565, flips=0 thread 43: min=128, max=343072800, average=28634.669922, mutexes_locked=53772, flips=0 thread 44: min=128, max=179864704, average=14064.057617, mutexes_locked=106429, flips=0 thread 45: min=128, max=179843296, average=25217.250000, mutexes_locked=59170, flips=0 thread 46: min=128, max=211197696, average=48879.082031, mutexes_locked=29320, flips=0 thread 47: min=128, max=233975168, average=51151.796875, mutexes_locked=31058, flips=0 thread 48: min=128, max=265659680, average=35999.316406, mutexes_locked=45445, flips=1 thread 49: min=128, max=249111584, average=35461.429688, mutexes_locked=46082, flips=0 thread 50: min=128, max=334780192, average=41472.347656, mutexes_locked=38486, flips=0 thread 51: min=128, max=358777984, average=18424.933594, mutexes_locked=86803, flips=0 thread 52: min=128, max=172021216, average=21271.957031, mutexes_locked=75973, flips=2 thread 53: min=128, max=233554048, average=9869008.000000, mutexes_locked=166, flips=0 thread 54: min=128, max=374320768, average=52629.281250, mutexes_locked=29880, flips=0 thread 55: min=128, max=327078720, average=54973.636719, mutexes_locked=29784, flips=1 thread 56: min=128, max=296259808, average=29250.394531, mutexes_locked=52176, flips=0 thread 57: min=128, max=218896160, average=47844.390625, mutexes_locked=30425, flips=0 thread 58: min=128, max=296342464, average=31385.640625, mutexes_locked=45617, flips=1 thread 59: min=128, max=194607232, average=32321.542969, mutexes_locked=48136, flips=0 thread 60: min=128, max=249039680, average=153157.953125, mutexes_locked=9263, flips=0 thread 61: min=128, max=156064480, average=66134.593750, mutexes_locked=24741, flips=0 thread 62: min=128, max=374145408, average=40410.339844, mutexes_locked=36002, flips=1 thread 63: min=128, max=327196224, average=34403.753906, mutexes_locked=45278, flips=0 server: min=128, max=701799200, average=268447.125000, mutexes_locked=6240, flips=1000 real 0m0.432s user 0m6.892s sys 0m0.004s ubuntu@ip-172-31-33-219:~$ sudo apt install -yqq libc6-lse The following NEW packages will be installed: libc6-lse 0 upgraded, 1 newly installed, 0 to remove and 18 not upgraded. Need to get 1077 kB of archives. After this operation, 3304 kB of additional disk space will be used. Selecting previously unselected package libc6-lse:arm64. (Reading database ... 94946 files and directories currently installed.) Preparing to unpack .../libc6-lse_2.27-3ubuntu1.3_arm64.deb ... Unpacking libc6-lse:arm64 (2.27-3ubuntu1.3) ... Setting up libc6-lse:arm64 (2.27-3ubuntu1.3) ... Processing triggers for libc-bin (2.27-3ubuntu1.3) ... ubuntu@ip-172-31-33-219:~$ strace -eopenat ls openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libselinux.so.1", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/atomics/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/libpcre.so.3", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/atomics/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/lib/aarch64-linux-gnu/atomics/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/proc/filesystems", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/aarch64-linux-gnu/gconv/gconv-modules.cache", O_RDONLY) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MEASUREMENT", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_TELEPHONE", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_ADDRESS", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_NAME", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_PAPER", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MESSAGES", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MESSAGES/SYS_LC_MESSAGES", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_MONETARY", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_COLLATE", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_TIME", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_NUMERIC", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, "/usr/lib/locale/C.UTF-8/LC_CTYPE", O_RDONLY|O_CLOEXEC) = 3 openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 a.c a.out +++ exited with 0 +++ ubuntu@ip-172-31-33-219:~$ time ./a.out thread 0: min=128, max=851840, average=17455.943359, mutexes_locked=1686, flips=45 thread 1: min=128, max=1308384, average=40662.308594, mutexes_locked=776, flips=16 thread 2: min=128, max=1612704, average=14104.613281, mutexes_locked=2231, flips=63 thread 3: min=128, max=970976, average=13640.013672, mutexes_locked=2288, flips=43 thread 4: min=128, max=220736, average=10136.965820, mutexes_locked=1424, flips=37 thread 5: min=128, max=913632, average=12980.020508, mutexes_locked=2519, flips=64 thread 6: min=128, max=784096, average=13341.416992, mutexes_locked=2441, flips=52 thread 7: min=128, max=724576, average=10121.278320, mutexes_locked=3235, flips=72 thread 8: min=128, max=1373760, average=13463.912109, mutexes_locked=2445, flips=60 thread 9: min=128, max=839488, average=15711.789062, mutexes_locked=2121, flips=46 thread 10: min=128, max=467072, average=14799.766602, mutexes_locked=2263, flips=42 thread 11: min=128, max=844000, average=14749.674805, mutexes_locked=2285, flips=42 thread 12: min=128, max=873184, average=13017.318359, mutexes_locked=2591, flips=35 thread 13: min=128, max=947488, average=13383.441406, mutexes_locked=2533, flips=42 thread 14: min=128, max=1055136, average=20691.996094, mutexes_locked=1650, flips=26 thread 15: min=128, max=1027968, average=25056.958984, mutexes_locked=1367, flips=14 thread 16: min=128, max=1462560, average=14085.414062, mutexes_locked=2435, flips=58 thread 17: min=128, max=2060128, average=24347.046875, mutexes_locked=1428, flips=13 thread 18: min=128, max=1075680, average=12786.740234, mutexes_locked=2698, flips=52 thread 19: min=128, max=1178464, average=21791.363281, mutexes_locked=1609, flips=35 thread 20: min=128, max=1985792, average=15403.351562, mutexes_locked=2275, flips=27 thread 21: min=128, max=1180416, average=25463.050781, mutexes_locked=1373, flips=17 thread 22: min=128, max=1569664, average=26278.457031, mutexes_locked=1343, flips=10 thread 23: min=128, max=913984, average=28779.505859, mutexes_locked=1232, flips=11 thread 24: min=128, max=835264, average=36856.191406, mutexes_locked=963, flips=16 thread 25: min=128, max=1162528, average=25859.195312, mutexes_locked=1382, flips=14 thread 26: min=128, max=1266720, average=24596.912109, mutexes_locked=1469, flips=10 thread 27: min=128, max=1561568, average=31039.863281, mutexes_locked=1171, flips=8 thread 28: min=128, max=1083072, average=25586.796875, mutexes_locked=1430, flips=10 thread 29: min=128, max=1579776, average=22116.525391, mutexes_locked=1669, flips=19 thread 30: min=128, max=3101792, average=48816.921875, mutexes_locked=730, flips=0 thread 31: min=128, max=30080, average=2023.529419, mutexes_locked=17, flips=0 thread 32: min=128, max=72352, average=4123.428711, mutexes_locked=28, flips=0 thread 33: min=128, max=5016896, average=560679.375000, mutexes_locked=39, flips=0 thread 34: min=1888, max=1888, average=1888.000000, mutexes_locked=1, flips=0 thread 35: min=832, max=832, average=832.000000, mutexes_locked=1, flips=0 thread 36: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 37: min=608, max=38848, average=13418.666992, mutexes_locked=3, flips=0 thread 38: min=128, max=74624, average=4579.000000, mutexes_locked=32, flips=0 thread 39: min=86208, max=86208, average=86208.000000, mutexes_locked=1, flips=0 thread 40: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 41: min=1152, max=54976, average=28064.000000, mutexes_locked=2, flips=0 thread 42: min=128, max=6300224, average=212758.406250, mutexes_locked=30, flips=0 thread 43: min=224, max=78560, average=16070.400391, mutexes_locked=5, flips=0 thread 44: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 45: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 46: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 47: min=128, max=6826048, average=299241.000000, mutexes_locked=71, flips=0 thread 48: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 49: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 50: min=1000000, max=6356064, average=6356064.000000, mutexes_locked=1, flips=0 thread 51: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 52: min=128, max=2077408, average=38719.035156, mutexes_locked=829, flips=0 thread 53: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 54: min=160, max=704, average=344.000000, mutexes_locked=4, flips=0 thread 55: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 56: min=26016, max=26016, average=26016.000000, mutexes_locked=1, flips=0 thread 57: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 58: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 thread 59: min=93504, max=93504, average=93504.000000, mutexes_locked=1, flips=0 thread 60: min=160, max=37056, average=7648.000000, mutexes_locked=5, flips=0 thread 61: min=128, max=5559136, average=724296.875000, mutexes_locked=36, flips=1 thread 62: min=128, max=576, average=298.666656, mutexes_locked=6, flips=0 thread 63: min=1000000, max=0, average=nan, mutexes_locked=0, flips=0 server: min=128, max=3027776, average=20226.677734, mutexes_locked=1470, flips=1000 real 0m0.013s user 0m0.020s sys 0m0.166s ubuntu@ip-172-31-33-219:~$ dpkg -l libc6 libc6-lse | cat Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-===============-===============-============-================================= ii libc6:arm64 2.27-3ubuntu1.3 arm64 GNU C Library: Shared libraries ii libc6-lse:arm64 2.27-3ubuntu1.3 arm64 GNU C Library: Shared Libraries