Very slow LXC perfoance

S

stony999

Renowned Member
Oct 22, 2010
20
1
68
I have setup 2 machines with Intel E1240 v6 CPUs and 32 GB of RAM on latest proxmox51 (Dec 2017). For the time being the machines run independently.
After a fresh install and restoring an LXC virtual machine from another Intel machine, I discovered huge performance issues. Machines won't really start and the load is between 10 and 20 in idle mode. And "iotop" shows about 10-15 MB/sec writes during idle, although no process is really writing. Filesystem ist ZFS Raid1.

What puzzles me most, is the following.
The following log is from a Freeswitch SIP server process starting up. The following lines are showing a runtime of some msec as the display suggests. In fact, these lines take about 5 sec in reality. So there must be something severe going on.
Code: 
2018-03-08 16:48:50.950210 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_set_media_stats'
2018-03-08 16:48:50.950221 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_video_bitrate'
2018-03-08 16:48:50.950229 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_video_refresh'
2018-03-08 16:48:50.950237 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_outgoing_answer'
2018-03-08 16:48:50.950241 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_limit'
2018-03-08 16:48:50.950246 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_limit_release'
2018-03-08 16:48:50.950250 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_limit_release'
2018-03-08 16:48:50.950257 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_loglevel'
2018-03-08 16:48:50.950266 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_media'
2018-03-08 16:48:50.950270 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_media_3p'
2018-03-08 16:48:50.950275 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_media_reneg'
2018-03-08 16:48:50.950280 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_park'
2018-03-08 16:48:50.950285 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_pause'
2018-03-08 16:48:50.950289 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_phone_event'
2018-03-08 16:48:50.950294 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_ring_ready'
2018-03-08 16:48:50.950299 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_pre_answer'
2018-03-08 16:48:50.950304 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_preprocess'
2018-03-08 16:48:50.950308 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_record'
2018-03-08 16:48:50.950313 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_recovery_refresh'
2018-03-08 16:48:50.950318 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_recv_dtmf'
2018-03-08 16:48:50.950323 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_redirect'
2018-03-08 16:48:50.950327 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_send_dtmf'
2018-03-08 16:48:50.950332 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_session_heartbeat'
2018-03-08 16:48:50.950336 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_setvar_multi'
2018-03-08 16:48:50.950341 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_setvar'
2018-03-08 16:48:50.950345 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_transfer'
2018-03-08 16:48:50.950350 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_dual_transfer'
2018-03-08 16:48:50.950355 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_simplify'
2018-03-08 16:48:50.950360 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_jitterbuffer'
2018-03-08 16:48:50.950364 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_zombie_exec'
2018-03-08 16:48:50.950369 [NOTICE] switch_loadable_module.c:338 Adding API Function 'uuid_xfer_zombie'
2018-03-08 16:48:50.950373 [NOTICE] switch_loadable_module.c:338 Adding API Function 'xml_flush_cache'
2018-03-08 16:48:50.950378 [NOTICE] switch_loadable_module.c:338 Adding API Function 'xml_locate'
2018-03-08 16:48:50.950382 [NOTICE] switch_loadable_module.c:338 Adding API Function 'xml_wrap'
2018-03-08 16:48:50.950388 [NOTICE] switch_loadable_module.c:338 Adding API Function 'file_exists'
2018-03-08 16:48:50.950392 [NOTICE] switch_loadable_module.c:338 Adding API Function 'getcputime'
2018-03-08 16:48:50.950397 [NOTICE] switch_loadable_module.c:338 Adding API Function 'json'
2018-03-08 16:48:50.950401 [NOTICE] switch_loadable_module.c:338 Adding API Function 'msrp'

I made some experience with Apollo Lake CPUs recently (but this is Kaby Lake), where I had to reduce c-states to get the right performance. So I added
Code: 
GRUB_CMDLINE_LINUX="intel_idle.max_cstate=1"
to grub. However this changed nothing, although
Code: 
/sys/module/intel_idle/parameters/max_cstate
was 1.

I am lost here. Anybody has a hint?
 
Hi,

general you should disable all power savings in the bios and/or if available set the bios in performance mode.
 
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