found 2.13
thanks
strace -c output:
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
99.64 11.034047 1 6867445 4194635 newfstatat
0.33 0.036633 18 1996 read
0.03 0.003487 1 1996 lseek
------ ----------- ----------- --------- --------- ----------------
100.00 11.074167 1 6871437 4194635 total
strace -c -p 28378 10.34s user 43.25s system 45% cpu 1:56.67 total
Snippet from regular strace output:
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_source_Sources",
{st_mode=S_IFREG|0644, st_size=5270421, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_source_Sources",
{st_mode=S_IFREG|0644, st_size=33050, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_non-free_source_Sources",
{st_mode=S_IFREG|0644, st_size=3342, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_non-free-firmware_source_Sources",
{st_mode=S_IFREG|0644, st_size=18911, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-amd64_Packages",
{st_mode=S_IFREG|0644, st_size=2463724, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-amd64_Packages",
{st_mode=S_IFREG|0644, st_size=2463724, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-i386_Packages",
{st_mode=S_IFREG|0644, st_size=2066548, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-i386_Packages",
{st_mode=S_IFREG|0644, st_size=2066548, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.xz",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.bz2",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.lzma",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.gz",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.lz4",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.zst",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_binary-all_Packages.uncompressed",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_i18n_Translation-en",
{st_mode=S_IFREG|0644, st_size=1668510, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_main_i18n_Translation-en",
{st_mode=S_IFREG|0644, st_size=1668510, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-amd64_Packages",
{st_mode=S_IFREG|0644, st_size=35708, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-amd64_Packages",
{st_mode=S_IFREG|0644, st_size=35708, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-i386_Packages",
{st_mode=S_IFREG|0644, st_size=26846, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-i386_Packages",
{st_mode=S_IFREG|0644, st_size=26846, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.xz",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.bz2",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.lzma",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.gz",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.lz4",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.zst",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_binary-all_Packages.uncompressed",
0x7ffeddb5eec0, 0) = -1 ENOENT (No such file or directory)
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_i18n_Translation-en",
{st_mode=S_IFREG|0644, st_size=26398, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_contrib_i18n_Translation-en",
{st_mode=S_IFREG|0644, st_size=26398, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_non-free_binary-amd64_Packages",
{st_mode=S_IFREG|0644, st_size=44514, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_non-free_binary-amd64_Packages",
{st_mode=S_IFREG|0644, st_size=44514, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_non-free_binary-i386_Packages",
{st_mode=S_IFREG|0644, st_size=27274, ...}, 0) = 0
[pid 28378] newfstatat(AT_FDCWD</var/backups>,
"/var/lib/apt/lists/http.debian.net_debian_dists_stable-backports_non-free_binary-i386_Packages",
{st_mode=S_IFREG|0644, st_size=27274, ...}, 0) = 0
Filtering out newfstatat() calls, we see
[pid 28444] ppoll([{fd=9<{eventfd-count=0, eventfd-id=239,
eventfd-semaphore=0}>, events=POLLIN}], 1, NULL, NULL, 8 <unfinished ...>
[pid 28443] ppoll([{fd=6<{eventfd-count=0, eventfd-id=229,
eventfd-semaphore=0}>, events=POLLIN}], 1, NULL, NULL, 8 <unfinished ...>
[pid 28442] futex(0x6da8f90, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 28378] pselect6(145, [144<pipe:[8903427]>], NULL, NULL, {tv_sec=0,
tv_nsec=3768247}, NULL) = 0 (Timeout)
[pid 28378] read(144<pipe:[8903427]>, 0xb80b200, 8192) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 28378] wait4(43984, 0x7ffeddb5f67c, WNOHANG, NULL) = 0
[pid 28378] pselect6(145, [144<pipe:[8903427]>], NULL, NULL, {tv_sec=0,
tv_nsec=100000000}, NULL) = 0 (Timeout)
[pid 28378] read(144<pipe:[8903427]>, 0xb80b200, 8192) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 28378] wait4(43984, 0x7ffeddb5f67c, WNOHANG, NULL) = 0
[pid 28378] pselect6(145, [144<pipe:[8903427]>], NULL, NULL, {tv_sec=0,
tv_nsec=100000000}, NULL) = 0 (Timeout)
[pid 28378] read(144<pipe:[8903427]>, 0xb80b200, 8192) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 28378] wait4(43984, 0x7ffeddb5f67c, WNOHANG, NULL) = 0
[pid 28378] pselect6(145, [144<pipe:[8903427]>], NULL, NULL, {tv_sec=0,
tv_nsec=100000000}, NULL) = 0 (Timeout)
[pid 28378] read(144<pipe:[8903427]>, 0xb80b200, 8192) = -1 EAGAIN (Resource
temporarily unavailable)
[pid 28378] wait4(43984, 0x7ffeddb5f67c, WNOHANG, NULL) = 0
[pid 28378] pselect6(145, [144<pipe:[8903427]>], NULL, NULL, {tv_sec=0,
tv_nsec=100000000}, NULL) = 0 (Timeout)
Process info:
PID PPID USER NI RES USS SWAP SHR S nTH P %CPU %CUC
%MEM TIME+ WCHAN COMMAND
28378 28342 root 0 328972 310920 0 211780 R 4 22 100.1 8.426
0.5 237:15.05 - /usr/bin/python3 /usr/bin/unattended-upgrade
The process tree looks like this (at 10:53 on 24 August):
root 28338 0.0 0.0 2692 1468 ? Ss Aug22 0:00 \_ /bin/sh
/usr/lib/apt/apt.systemd.daily install
root 28342 0.0 0.0 2692 1612 ? S Aug22 0:00 | \_
/bin/sh /usr/lib/apt/apt.systemd.daily lock_is_held install
root 28378 8.4 0.5 524748 345904 ? Sl Aug22 239:12 | \_
/usr/bin/python3 /usr/bin/unattended-upgrade
root 43984 1.2 0.5 548916 344920 ? S 10:51 0:01 |
\_ /usr/bin/python3 /usr/bin/unattended-upgrade
root 44048 0.0 0.0 2692 1460 ? S 10:51 0:00 |
\_ /bin/sh -c /usr/bin/apt-listchanges --apt || test $? -lt 10
root 44049 2.7 0.0 71644 44380 ? S 10:51 0:02 |
\_ /usr/bin/python3 /usr/bin/apt-listchanges --apt
root 46909 46.6 0.3 256656 241956 ? S 10:52 0:01 |
\_ apt-get -qq changelog openjdk-17-jdk-headless=17.0.20.1+1-1
root 46922 0.0 0.0 5564 1452 ? D 10:53 0:00 |
\_ cat /tmp/apt-changelog-h6eEF2/openjdk-17.changelog
So it's not so much that unattended-upgrades as a whole is "stuck"; its
child 43984 is actually doing what it should. The problem is that the parent
process 28378 is in a busy loop for some reason, burning CPU cycles.
András
--
If at first you don't succeed, skydiving is not for you.
