Your message dated Thu, 18 Mar 2021 09:56:59 +0530 with message-id <87im5pccj0.fsf@bhrigu> and subject line Re: debian-installer: Script exected in preseed/late_command on dual CPU socket system sees only Single CPU socket has caused the Debian Bug report #965263, regarding debian-installer: Script exected in preseed/late_command on dual CPU socket system sees only Single CPU socket to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 965263: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965263 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: debian-installer Severity: normal Dear Maintainer, I recently moved some code to preseed/late_command script to do the CPU pinning for host machine. Script snippet looks something like below NODE_CPUS=2 for node in /sys/devices/system/node/node[0-9]; do cat $node/cpu[0-9]*/topology/thread_siblings_list | sort -nu | sed 's/,/\n/' | head -n$NODE_CPUS done It captured a sibling core from only node0 of the system. So out of curiosity I observed the logs we captured on rsyslog server and found what I see below Jul 14 09:45:18 10.33.97.110 in-target: ++ cat /sys/devices/system/node/node0/cpu0/topology/thread_siblings_list /sys/devices/system/node/node0/cpu10/topology/thread_siblings_list /sys/devices/system/no de/node0/cpu11/topology/thread_siblings_list /sys/devices/system/node/node0/cpu12/topology/thread_siblings_list /sys/devices/system/node/node0/cpu13/topology/thread_siblings_list /sys/devices/system/nod e/node0/cpu14/topology/thread_siblings_list /sys/devices/system/node/node0/cpu15/topology/thread_siblings_list /sys/devices/system/node/node0/cpu16/topology/thread_siblings_list /sys/devices/system/node /node0/cpu17/topology/thread_siblings_list /sys/devices/system/node/node0/cpu18/topology/thread_siblings_list /sys/devices/system/node/node0/cpu19/topology/thread_siblings_list /sys/devices/system/node/ node0/cpu1/topology/thread_siblings_list /sys/devices/system/node/node0/cpu20/topology/thread_siblings_list /sys/devices/system/node/node0/cpu21/topology/thread_siblings_list /sys/devices/system/node/no de0/cpu22/topology/thr Jul 14 09:45:18 10.33.97.110 in-target: system/node/node0/cpu23/topology/thread_siblings_list /sys/devices/system/node/node0/cpu24/topology/thread_siblings_list /sys/devices/system/node/node0/cpu25/topo logy/thread_siblings_list /sys/devices/system/node/node0/cpu26/topology/thread_siblings_list /sys/devices/system/node/node0/cpu27/topology/thread_siblings_list /sys/devices/system/node/node0/cpu28/topol ogy/thread_siblings_list /sys/devices/system/node/node0/cpu29/topology/thread_siblings_list /sys/devices/system/node/node0/cpu2/topology/thread_siblings_list /sys/devices/system/node/node0/cpu30/topolog y/thread_siblings_list /sys/devices/system/node/node0/cpu31/topology/thread_siblings_list /sys/devices/system/node/node0/cpu32/topology/thread_siblings_list /sys/devices/system/node/node0/cpu33/topology /thread_siblings_list /sys/devices/system/node/node0/cpu34/topology/thread_siblings_list /sys/devices/system/node/node0/cpu35/topology/thread_siblings_list /sys/devices/system/node/node0/cpu36/topology/ thread_siblings_list / Jul 14 09:45:18 10.33.97.110 in-target: pu37/topology/thread_siblings_list /sys/devices/system/node/node0/cpu38/topology/thread_siblings_list /sys/devices/system/node/node0/cpu39/topology/thread_sibling s_list /sys/devices/system/node/node0/cpu3/topology/thread_siblings_list /sys/devices/system/node/node0/cpu40/topology/thread_siblings_list /sys/devices/system/node/node0/cpu41/topology/thread_siblings_ list /sys/devices/system/node/node0/cpu42/topology/thread_siblings_list /sys/devices/system/node/node0/cpu43/topology/thread_siblings_list /sys/devices/system/node/node0/cpu44/topology/thread_siblings_l ist /sys/devices/system/node/node0/cpu45/topology/thread_siblings_list /sys/devices/system/node/node0/cpu46/topology/thread_siblings_list /sys/devices/system/node/node0/cpu47/topology/thread_siblings_li st /sys/devices/system/node/node0/cpu48/topology/thread_siblings_list /sys/devices/system/node/node0/cpu49/topology/thread_siblings_list /sys/devices/system/node/node0/cpu4/topology/thread_siblings_list /sys/devices/system/n Jul 14 09:45:18 10.33.97.110 in-target: _siblings_list /sys/devices/system/node/node0/cpu51/topology/thread_siblings_list /sys/devices/system/node/node0/cpu52/topology/thread_siblings_list /sys/devices/ system/node/node0/cpu53/topology/thread_siblings_list /sys/devices/system/node/node0/cpu54/topology/thread_siblings_list /sys/devices/system/node/node0/cpu55/topology/thread_siblings_list /sys/devices/s ystem/node/node0/cpu56/topology/thread_siblings_list /sys/devices/system/node/node0/cpu57/topology/thread_siblings_list /sys/devices/system/node/node0/cpu58/topology/thread_siblings_list /sys/devices/sy stem/node/node0/cpu59/topology/thread_siblings_list /sys/devices/system/node/node0/cpu5/topology/thread_siblings_list /sys/devices/system/node/node0/cpu60/topology/thread_siblings_list /sys/devices/syst em/node/node0/cpu61/topology/thread_siblings_list /sys/devices/system/node/node0/cpu62/topology/thread_siblings_list /sys/devices/system/node/node0/cpu63/topology/thread_siblings_list /sys/devices/syste m/node/node0/cpu64/top Jul 14 09:45:18 10.33.97.110 in-target: /devices/system/node/node0/cpu65/topology/thread_siblings_list /sys/devices/system/node/node0/cpu66/topology/thread_siblings_list /sys/devices/system/node/node0/c pu67/topology/thread_siblings_list /sys/devices/system/node/node0/cpu68/topology/thread_siblings_list /sys/devices/system/node/node0/cpu69/topology/thread_siblings_list /sys/devices/system/node/node0/cp u6/topology/thread_siblings_list /sys/devices/system/node/node0/cpu70/topology/thread_siblings_list /sys/devices/system/node/node0/cpu71/topology/thread_siblings_list /sys/devices/system/node/node0/cpu7 2/topology/thread_siblings_list /sys/devices/system/node/node0/cpu73/topology/thread_siblings_list /sys/devices/system/node/node0/cpu74/topology/thread_siblings_list /sys/devices/system/node/node0/cpu75 /topology/thread_siblings_list /sys/devices/system/node/node0/cpu76/topology/thread_siblings_list /sys/devices/system/node/node0/cpu77/topology/thread_siblings_list /sys/devices/system/node/node0/cpu78/ topology/thread_siblin Jul 14 09:45:18 10.33.97.110 in-target: e/node0/cpu79/topology/thread_siblings_list /sys/devices/system/node/node0/cpu7/topology/thread_siblings_list /sys/devices/system/node/node0/cpu80/topology/thread _siblings_list /sys/devices/system/node/node0/cpu81/topology/thread_siblings_list /sys/devices/system/node/node0/cpu82/topology/thread_siblings_list /sys/devices/system/node/node0/cpu83/topology/thread_ siblings_list /sys/devices/system/node/node0/cpu84/topology/thread_siblings_list /sys/devices/system/node/node0/cpu85/topology/thread_siblings_list /sys/devices/system/node/node0/cpu86/topology/thread_s iblings_list /sys/devices/system/node/node0/cpu87/topology/thread_siblings_list /sys/devices/system/node/node0/cpu88/topology/thread_siblings_list /sys/devices/system/node/node0/cpu89/topology/thread_si blings_list /sys/devices/system/node/node0/cpu8/topology/thread_siblings_list /sys/devices/system/node/node0/cpu90/topology/thread_siblings_list /sys/devices/system/node/node0/cpu91/topology/thread_sibl ings_list /sys/devices Jul 14 09:45:18 10.33.97.110 in-target: gy/thread_siblings_list /sys/devices/system/node/node0/cpu93/topology/thread_siblings_list /sys/devices/system/node/node0/cpu94/topology/thread_siblings_list /sys /devices/system/node/node0/cpu95/topology/thread_siblings_list /sys/devices/system/node/node0/cpu9/topology/thread_siblings_list As you can see all core appears to be in node0 but once system is installed and booted. In lscpu and numactl we see following output. NUMA node0 CPU(s): 0-23,48-71 NUMA node1 CPU(s): 24-47,72-95 node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 node 1 cpus: 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 I'm bit surprised by this behavior as intended system all came up with single core (2thread) instead of 2 core (4thread). Is this expected behavior? Do I need to do any specific configuration to make sure CPU is visible across nodes?. Please let me know if you need more information. Warm Regards, Vasudev -- System Information: Debian Release: bullseye/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: armhf, arm64 Kernel: Linux 5.6.0-2-amd64 (SMP w/8 CPU cores) Kernel taint flags: TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE= (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled
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--- Begin Message ---Hi Again, I noticed at later point that this is not the Debian Installer issue but caused by kernel command line parameter numa=off passed in the pxe file which I did not notice earlier. Closing the ticket as its not really issue. Cheers, Vasudev
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