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Re: [HTCondor-users] cgroup error
- Date: Wed, 26 Aug 2015 16:04:33 +0200 (CEST)
- From: "Beyer, Christoph" <christoph.beyer@xxxxxxx>
- Subject: Re: [HTCondor-users] cgroup error
Hups,
forgot to mention I used the config from the manual mainly :
[root@wn2-test]/cgroup/cpu/htcondor# cat /etc/cgconfig.conf
[ snip ]
group htcondor {
cpu {}
cpuacct {}
memory {}
freezer {}
blkio {}
}
In htcondor.cfg:
# Enable CGROUP control
BASE_CGROUP = htcondor
# hard: job can't access more physical memory than allocated
# soft: job can access more physical memory than allocated when there are free memory
CGROUP_MEMORY_LIMIT_POLICY = hard
Are there any further knobs for finetuning or things I should be aware of ? Would cgroups laso the tool to prevent forkbombs ?
cheers
~christoph
--
/* Christoph Beyer | Office: Building 2b / 23 *\
* DESY | Phone: 040-8998-2317 *
* - IT - | Fax: 040-8994-2317 *
\* 22603 Hamburg | http://www.desy.de */
----- Original Message -----
From: "Beyer, Christoph" <christoph.beyer@xxxxxxx>
To: "htcondor-users" <htcondor-users@xxxxxxxxxxx>
Sent: Wednesday, 26 August, 2015 15:42:31
Subject: Re: [HTCondor-users] cgroup error
Hi Iain,
thanks for the offer, I tried again with longer job runtime and everything seems to work as expected now :)
[chbeyer@bm-test]/mnt/bshare/chbeyer% condor_q -hold
250.1 chbeyer 8/26 09:53 Error from slot1@xxxxxxxxxxxxxxxx: Job has gone over memory limit of 1024 megabytes.
250.4 chbeyer 8/26 09:54 Error from slot1@xxxxxxxxxxxxxxxx: Job has gone over memory limit of 1024 megabytes.
250.8 chbeyer 8/26 09:54 Error from slot1@xxxxxxxxxxxxxxxx: Job has gone over memory limit of 1024 megabytes.
[ snip ]
Will be looking at the hierarchical accounting groups next, I remember a sophisticated entry from Andrew with wildcards and some kind of guessing logic, maybe you can help me out with that if you use it the same way ? ;)
cheers
chris
--
/* Christoph Beyer | Office: Building 2b / 23 *\
* DESY | Phone: 040-8998-2317 *
* - IT - | Fax: 040-8994-2317 *
\* 22603 Hamburg | http://www.desy.de */
----- Original Message -----
From: "Iain Steers" <iain.steers@xxxxxxx>
To: "htcondor-users" <htcondor-users@xxxxxxxxxxx>
Sent: Tuesday, 25 August, 2015 16:17:17
Subject: Re: [HTCondor-users] cgroup error
Hi Christoph,
We've been running SLC6 cgroups in our HTCondor pool for a couple of months now without issue.
Give me a shout and mail me your config if you'd like.
Cheers, Iain
On Tue, Aug 25, 2015 at 08:53:08AM -0500, Lincoln Bryant wrote:
> Hi,
>
> Shot in the dark, but.. do you have the cgroups service running? /etc/init.d/cgconfig status?
>
> Cheers,
> Lincoln
>
> > On Aug 25, 2015, at 8:48 AM, Beyer, Christoph <christoph.beyer@xxxxxxx> wrote:
> >
> >
> > Hi,
> >
> > I am using SL6 (2.6.32-504.8.1.el6.x86_64) and HTC 8.3.7 Jul 23 2015 BuildID: 331383
> >
> > I enabled cgroups as described in the memory and send 'stress' jobs using 10 gb memory while announcing 1gb of memory usage via submit file.
> >
> > The result is somehow not as I would expect:
> >
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> > 20378 chbeyer 20 0 9.8g 1.0g 144 D 2.0 6.4 0:01.03 stress
> > 20400 chbeyer 20 0 9.8g 1.0g 144 D 2.0 6.4 0:00.77 stress
> > 20381 chbeyer 20 0 9.8g 1.0g 144 D 1.3 6.4 0:00.97 stress
> > 20384 chbeyer 20 0 9.8g 1.0g 144 D 1.3 6.3 0:00.97 stress
> > 20386 chbeyer 20 0 9.8g 1.0g 144 D 1.3 6.4 0:01.03 stress
> > 20388 chbeyer 20 0 9.8g 1.0g 144 D 1.3 6.3 0:00.86 stress
> > 20392 chbeyer 20 0 9.8g 1.0g 144 D 1.3 6.3 0:00.80 stress
> > 20398 chbeyer 20 0 9.8g 1.0g 144 D 1.3 6.3 0:00.71 stress
> >
> >
> > The procd log file shows some errors:
> >
> >
> > 08/25/15 15:40:26 : PROC_FAMILY_GET_USAGE
> > 08/25/15 15:40:26 : gathering usage data for family with root pid 20361
> > 08/25/15 15:40:26 : Unable to read cgroup htcondor/condor_var_lib_condor_execute_slot1_2@xxxxxxxxxxxxxxxx cpuacct stats (ProcFamily 20373): Cgroup invalid operation.
> > 08/25/15 15:40:26 : Internal cgroup error when retrieving CPU statistics: Cgroup invalid operation
> > 08/25/15 15:40:26 : Unable to read cgroup htcondor/condor_var_lib_condor_execute_slot1_2@xxxxxxxxxxxxxxxx memory stats (ProcFamily 20373): 50016 No such file or directory.
> > 08/25/15 15:40:26 : PROC_FAMILY_GET_USAGE
> > 08/25/15 15:40:26 : gathering usage data for family with root pid 20360
> > 08/25/15 15:40:26 : Unable to read cgroup htcondor/condor_var_lib_condor_execute_slot1_1@xxxxxxxxxxxxxxxx cpuacct stats (ProcFamily 20372): Cgroup invalid operation.
> > [ snip ]
> > 08/25/15 13:46:41 : PROC_FAMILY_TRACK_FAMILY_VIA_CGROUP
> > 08/25/15 13:46:41 : Setting cgroup to htcondor/condor_var_lib_condor_execute_slot1_3@xxxxxxxxxxxxxxxx for ProcFamily 15896.
> > 08/25/15 13:46:41 : Warning - cgroup controller cpuacct not mounted (but not required).
> > 08/25/15 13:46:41 : Warning - cgroup controller memory not mounted (but not required).
> > 08/25/15 13:46:41 : Warning - cgroup controller freezer not mounted (but not required).
> > 08/25/15 13:46:41 : Warning - cgroup controller blkio not mounted (but not required).
> > 08/25/15 13:46:41 : Warning - cgroup controller cpu not mounted (but not required).
> > 08/25/15 13:46:41 : Cannot attach pid 15896 to cgroup htcondor/condor_var_lib_condor_execute_slot1_3@xxxxxxxxxxxxxxxx for ProcFamily 15896: 50014 Cgroup not initialized
> >
> > I thought the jobs that by far exceed the memory limit would be killed and go on hold but that seems only to happen from time to time (?)
> >
> > best regards
> > ~christoph
> >
> >
> > --
> > /* Christoph Beyer | Office: Building 2b / 23 *\
> > * DESY | Phone: 040-8998-2317 *
> > * - IT - | Fax: 040-8994-2317 *
> > \* 22603 Hamburg | http://www.desy.de */
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> >
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> >
>
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