Re: [vserver] scheduling question

From: Herbert Poetzl <herbert_at_13thfloor.at>
Date: Fri 18 Jan 2008 - 00:19:25 GMT
Message-ID: <20080118001925.GA27456@MAIL.13thfloor.at>

On Thu, Jan 17, 2008 at 10:39:33AM +0100, ADNET Ghislain wrote:
> Hi,
>
> I have a little question about scheduling the vservers. I have a server:
>
> processor0 => Intel(R) Xeon(R) CPU 3040 @ 1.86GHz
> processor1 => Intel(R) Xeon(R) CPU 3040 @ 1.86GHz
> processorcount => 2
> productname => ProLiant DL320 G5
>
>
> and two vservers on it:

from http://linux-vserver.org/ProcFS#sched

> HOST:impec20:/usr/local/.aqadmin/home/aqadmin%(root)> more
> /proc/virtual/40265/sched
> FillRate: 6,0
> Interval: 10,10
> TokensMin: 15
> TokensMax: 125
> PrioBias: 0
> cpu 0: 9830 44 0 0 0 RI 62 15 125 6/10 0/10 0 0
> cpu 1: 6210 28 0 0 0 RI 62 15 125 6/10 0/10 0 0
                 ^----- ticks on hold

> HOST:impec20:/usr/local/.aqadmin/home/aqadmin%(root)> more
> /proc/virtual/40266/sched
> FillRate: 4,0
> Interval: 10,10
> TokensMin: 15
> TokensMax: 125
> PrioBias: 0
> cpu 0: 3047 26 0 0 0 RI 62 15 125 4/10 0/10 0 0
> cpu 1: 7750 25 0 0 0 RI 62 15 125 4/10 0/10 0 0
                 ^----- ticks on hold

> So basicaly i should have a 60/40 % for the servers, i disable idle cpu
> by using a fillrate2 of 0.
>
> So now i run a cpuburn program on each vserver:
>
> top - 10:06:33 up 98 days, 23:15, 3 users, load average: 1.69, 0.73, 0.32
> Tasks: 113 total, 4 running, 109 sleeping, 0 stopped, 0 zombie
> Cpu(s):100.0%us, 0.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si,
> 0.0%st
> Mem: 1033396k total, 956108k used, 77288k free, 220320k buffers
> Swap: 2104496k total, 1032k used, 2103464k free, 574772k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 16952 root 25 0 96 16 8 R 100 0.0 0:07.20 burnP6
> 16953 root 25 0 92 16 8 R 100 0.0 0:06.34 burnP6
> 16935 root 15 0 2232 1156 860 R 1 0.1 0:00.26 top
> 1 root 15 0 1944 592 504 S 0 0.1 0:00.34 init
> 2 root 10 -5 0 0 0 S 0 0.0 0:00.00 kthreadd
> 3 root RT -5 0 0 0 S 0 0.0 0:00.14 migration/0
> 4 root 34 19 0 0 0 S 0 0.0 0:00.04 ksoftirqd/0
>
>
> Here i got a 50/50 distribution of the cpu. Is it normal ? Is it because
> i have 2 cpu core and there is one more step to use for this case ?

so it looks to me like you didn't enable hard
scheduling for any of those two guests, which
in turn, will give you roughly even distribution

see http://linux-vserver.org/Capabilities_and_Flags

HTH,
Herbert

> i use:
> Versions:
> Kernel: 2.6.22.9-vs2.2.0.4
> VS-API: 0x00020200
> util-vserver: 0.30.214; Oct 1 2007, 15:10:35
>
> Features:
> CC: gcc, gcc (GCC) 4.1.2 20061115 (prerelease)
> (Debian 4.1.1-21)
> CXX: g++, g++ (GCC) 4.1.2 20061115 (prerelease)
> (Debian 4.1.1-21)
> CPPFLAGS: ''
> CFLAGS: '-g -O2 -std=c99 -Wall -pedantic -W
> -funit-at-a-time'
> CXXFLAGS: '-g -O2 -ansi -Wall -pedantic -W
> -fmessage-length=0 -funit-at-a-time'
> build/host: i686-pc-linux-gnu/i686-pc-linux-gnu
> Use dietlibc: yes
> Build C++ programs: yes
> Build C99 programs: yes
> Available APIs: v13,net,v21,v22,v23,netv2
> ext2fs Source: e2fsprogs
> syscall(2) invocation: alternative
> vserver(2) syscall#: 273/glibc
>
>
> --
> Cordialement,
> Ghislain
Received on Fri Jan 18 17:09:28 2008

[Next/Previous Months] [Main vserver Project Homepage] [Howto Subscribe/Unsubscribe] [Paul Sladen's vserver stuff]
Generated on Fri 18 Jan 2008 - 17:13:15 GMT by hypermail 2.1.8