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Re: [HTCondor-users] cgroups issue (cgroup invalid operation)

Ah, I donât know if it can help, but :


-          I see memory page allocation failures in the syslogs since I activated the cgroups this week, for instance


attr: page allocation failure. order:4, mode:0xd0

Pid: 3124060, comm: attr Not tainted 2.6.32-xxxx #1

Call Trace:

[<ffffffff811344ba>] ? __alloc_pages_nodemask+0x74a/0x8d0

[<ffffffff811734d2>] ? kmem_getpages+0x62/0x170

[<ffffffff811740ea>] ? fallback_alloc+0x1ba/0x270

[<ffffffff81173b3f>] ? cache_grow+0x2cf/0x320

[<ffffffff81173e69>] ? ____cache_alloc_node+0x99/0x160

[<ffffffff811b667d>] ? getxattr+0x14d/0x170

[<ffffffff81174ab9>] ? __kmalloc+0x199/0x230

[<ffffffff811b667d>] ? getxattr+0x14d/0x170

[<ffffffff8119f6eb>] ? path_walk+0x7b/0xe0

[<ffffffff8119be46>] ? final_putname+0x26/0x50

[<ffffffff8119c44b>] ? putname+0x2b/0x40

[<ffffffff811a0a22>] ? user_path_at+0x62/0xa0

[<ffffffff8115594c>] ? do_brk+0x26c/0x350

[<ffffffff8115302e>] ? remove_vma+0x6e/0x90

[<ffffffff811b66f5>] ? sys_lgetxattr+0x55/0x80

[<ffffffff8100b072>] ? system_call_fastpath+0x16/0x1b

(+lots of memory and cpu informations)


-          And I see /cgroup/*/â stat files, e.g :

# cat /cgroup/memory/htcondor/condor_home_condor_slot1_1\@wn296*/memory.stat

cache 4570165248

rss 221777920

mapped_file 1368064

pgpgin 132555261

pgpgout 131555005

swap 16384

inactive_anon 120786944

active_anon 101003264

inactive_file 2430099456

active_file 2140016640

unevictable 0

hierarchical_memory_limit 4792057856

hierarchical_memsw_limit 4792061952

total_cache 4570165248

total_rss 221777920

total_mapped_file 1368064

total_pgpgin 132555261

total_pgpgout 131555005

total_swap 16384

total_inactive_anon 120786944

total_active_anon 101003264

total_inactive_file 2430099456

total_active_file 2140016640

total_unevictable 0


funny, mmmmh ? ;)




De : HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] De la part de SCHAER Frederic
Envoyà: vendredi 18 mars 2016 21:32
à: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Objet : [PROVENANCE INTERNET] Re: [HTCondor-users] cgroups issue (cgroup invalid operation)


Salut Brian :]


Ah, yes, forgot to give that part of the config : itâs like what I could read in various guides :


[root@wn296 htcondor]# condor_config_val -startd -dump|grep -i cgroup

BASE_CGROUP = htcondor






De : HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] De la part de Brian Bockelman
Envoyà: vendredi 18 mars 2016 21:23
à: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Objet : Re: [HTCondor-users] cgroups issue (cgroup invalid operation)


Hi Frederic,


Whatâs the value of âBASE_CGROUPâ configuration variable?  I ask because I would have thought the ProcLog would show something like âUnable to read cgroup /htcondor/ââ instead of âUnable to read cgroup htcondor/ââ.  Maybe thereâs a base â/â that is getting automatically added in some places but not others?




On Mar 18, 2016, at 3:19 PM, SCHAER Frederic <frederic.schaer@xxxxxx> wrote:




So, I deployed cgroups for htcondorâ. And Iâm having issues.

First : looks like I have to restart condor, not just condor_reconfig it. (right ?)

Without a service restart, I get logs about âcgroups not initializedâ.


But problem is that even after restarting condor, the ProcsLog shows these errors :


03/18/16 20:59:53 : Unable to read cgroup htcondor/condor_home_condor_slot1_2@wn296 cpuacct stats (ProcFamily 3278233): Cgroup invalid operation.

03/18/16 20:59:53 : Internal cgroup error when retrieving CPU statistics: Cgroup invalid operation

03/18/16 20:59:53 : Unable to read cgroup htcondor/condor_home_condor_slot1_2@wn296 memory stats (ProcFamily 3278233): 50016 No such file or directory.


I am deploying cgroups so that memory accounting (RSS) doesnât double-tripple count stuff, which in the end is causing the jobs to be killed after they are reported as consuming more memory than requested.

Iâm wondering how to fix this ?

To answer coming questions :


-          Yes, cgconfig is running, and cgroups are mounted (but not visible with the mount command â sl6x/sl6.7 here) :

[root@wn296 htcondor]# service cgconfig status


[root@wn296 htcondor]# grep cgroup /proc/mounts

cgroup /cgroup/cpu cgroup rw,relatime,cpu 0 0

cgroup /cgroup/cpuset cgroup rw,relatime,cpuset 0 0

cgroup /cgroup/cpuacct cgroup rw,relatime,cpuacct 0 0

cgroup /cgroup/devices cgroup rw,relatime,devices 0 0

cgroup /cgroup/memory cgroup rw,relatime,memory 0 0

cgroup /cgroup/freezer cgroup rw,relatime,freezer 0 0

cgroup /cgroup/net_cls cgroup rw,relatime,net_cls 0 0

cgroup /cgroup/blkio cgroup rw,relatime,blkio 0 0


-          Yes, I see htcondor subdirectories, and I even see PIDs in the subdirectories tasks files :


[root@wn296 htcondor]# wc -l /cgroup/memory/htcondor/condor_home_condor_slot1_*/tasks|sed -r -e 's%(wn...).*/%\1/%'

0 /cgroup/memory/htcondor/condor_home_condor_slot1_10@wn296/tasks

0 /cgroup/memory/htcondor/condor_home_condor_slot1_11@wn296/tasks

6 /cgroup/memory/htcondor/condor_home_condor_slot1_1@wn296/tasks

22 /cgroup/memory/htcondor/condor_home_condor_slot1_2@wn296/tasks

22 /cgroup/memory/htcondor/condor_home_condor_slot1_3@wn296/tasks

22 /cgroup/memory/htcondor/condor_home_condor_slot1_4@wn296/tasks

0 /cgroup/memory/htcondor/condor_home_condor_slot1_5@wn296/tasks

0 /cgroup/memory/htcondor/condor_home_condor_slot1_6@wn296/tasks

0 /cgroup/memory/htcondor/condor_home_condor_slot1_7@wn296/tasks

0 /cgroup/memory/htcondor/condor_home_condor_slot1_8@wn296/tasks

0 /cgroup/memory/htcondor/condor_home_condor_slot1_9@wn296/tasks

72 total


-          Cgroups config :


[root@wn296 htcondor]# cat /etc/cgconfig.{conf,d/htcondor.conf}

# This file is being maintained by Puppet.



mount {

      cpu     = /cgroup/cpu;

      cpuset  = /cgroup/cpuset;

      cpuacct = /cgroup/cpuacct;

      devices = /cgroup/devices;

      memory  = /cgroup/memory;

      freezer = /cgroup/freezer;

      net_cls = /cgroup/net_cls;

      blkio   = /cgroup/blkio;


group htcondor {

      cpu {}

      cpuacct {}

      memory {}

      freezer {}

      blkio {}



-          And condor version : 8.4.3-2


The problem I have is that I have jobs submitted (not by me) with Memory requirements and that these jobs are still killed because of the RSS approximative accounting without cgroups â and for now, the killing is still going on :â(


Any ideas about whatâs wrong, and better, how to fix ? I admin Iâm very new to cgroups, so it might be that Iâm mistaken somewhereâ




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