Re: [LTP] OOM messages when running full ltp tests on a Hyper-V VM

[Li Wang <liwang@redhat.com>]

Hi,

----- Original Message -----
> 
> 
> My apologies for the incomplete reply, it got sent out before all details
> went it.
> 
> 
> 
> To continue the initial thread:
> 
> I’m trying to run a full ltp test run on Ubuntu 14.04.2 as a Hyper-V VM.
> 
> The VM is set with 8 or 12GB and 4 vCPUs, however during the tests execution
> the syslog records over 30 call traces similar to the one below.

It is normal to get these calltrace, you can check the oom0*.c file. These kind of
 programs are design to verify the OOM-Killer work well.

$ cat oom01.c 
...
 *
 * The program is designed to cope with unpredictable like amount and
 * system physical memory, swap size and other VMM technology like KSM,
 * memcg, memory hotplug and so on which may affect the OOM
 * behaviours. It simply increase the memory consumption 3G each time
 * until all the available memory is consumed and OOM is triggered.

Regards,
Li Wang

> 
> 
> 
> Haven’t tried vmware or other platforms, but I’m wondering why LTP processes
> go over the limit, or what would be a reference system resources that would
> accommodate a full run.
> 
> Otherwise, are there are params that can limitor specify the resources that
> LTP can use?
> 
> 
> 
> Sample call trace:
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5757.011711] Out of memory: Kill process
> 5902 (oom01) score 937 or sacrifice child
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5757.014099] Killed process 5902 (oom01)
> total-vm:15759784kB, anon-rss:7723620kB, file-rss:40kB
> 
> Jul 22 01:25:26 ubuntu kernel: [ 6211.981585] min_free_kbytes invoked
> oom-killer: gfp_mask=0x280da, order=0, oom_score_adj=0
> 
> Jul 22 01:25:26 ubuntu kernel: [ 6211.982662] min_free_kbytes cpuset=/
> mems_allowed=0
> 
> Jul 22 01:25:26 ubuntu kernel: [ 6211.983723] CPU: 1 PID: 12532 Comm:
> min_free_kbytes Not tainted 3.16.0-43-generic #58~14.04.1-Ubuntu
> 
> 
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.531764] Call Trace:
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.534570] [<ffffffff81765a91>]
> dump_stack+0x45/0x56
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.537888] [<ffffffff8175f645>]
> dump_header+0x7f/0x1f1
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.540655] [<ffffffff811655c5>]
> oom_kill_process+0x205/0x360
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.543361] [<ffffffff812ebbd5>] ?
> security_capable_noaudit+0x15/0x20
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.554536] [<ffffffff81165d72>]
> out_of_memory+0x492/0x4d0
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.557160] [<ffffffff8176019d>]
> __alloc_pages_slowpath+0x63e/0x775
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.559807] [<ffffffff8116bb23>]
> __alloc_pages_nodemask+0x273/0x2a0
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.563601] [<ffffffff811ae93a>]
> alloc_pages_vma+0x9a/0x150
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.569377] [<ffffffff8118f49c>]
> handle_mm_fault+0xcfc/0x10c0
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.574630] [<ffffffff81769c5f>] ?
> __schedule+0x35f/0x7a0
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.582479] [<ffffffff8105af5e>]
> __do_page_fault+0x19e/0x560
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.590664] [<ffffffff810a62e8>] ?
> __enqueue_entity+0x78/0x80
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.597382] [<ffffffff810a8015>] ?
> set_next_entity+0x95/0xb0
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.608215] [<ffffffff81011627>] ?
> __switch_to+0x167/0x580
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.614156] [<ffffffff8105b351>]
> do_page_fault+0x31/0x70
> 
> Jul 22 01:17:50 ubuntu kernel: [ 5756.616875] [<ffffffff81770168>]
> page_fault+0x28/0x30
> 
> 
> 
> 
> From: Cristian Valean [mailto:cristian.valean@live.com]
> Sent: Thursday, July 23, 2015 2:34 PM
> To: ltp-list@lists.sourceforge.net
> Subject: [LTP] OOM messages when running full ltp tests on a Hyper-V VM
> 
> 
> 
> 
> I’m trying to run a full ltp test run on Ubuntu 14.04.2 as a Hyper-V VM.
> 
> 
> 
> The VM is set with 8 or 12GB and 4 vCPUs, however during the tests execution
> the syslog records over 30 call traces similar to the one below.
> 
> 
> 
> 
> 
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> 
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