[Pacemaker] High context switches

[Andreas Zafiris]

Hello,

Please forgive me if this has already been discussed...
I have a pacemaker+openais setup of 2 Debian amd64 machines (IBM x3550, 2 Xeon 2.5GHz, 6GB Ram) with the following openais.conf:

Kernel: 2.6.26-2-amd64
Pacemaker-openais version: 1.0.5+hg20091012-1~bpo50+1

--- BEGIN openais.conf

otem {
        version: 2
        token: 3000
        token_retransmits_before_loss_const: 10
        join: 60
        consensus: 1500
        vsftype: none
        max_messages: 20
        clear_node_high_bit: yes
        secauth: off
        threads: 0
        rrp_mode: none
        interface {
                # The following values need to be set based on your environment
                ringnumber: 0
                bindnetaddr: 10.10.1.0
                mcastaddr: 226.94.1.1
                mcastport: 5405
        }
}

logging {
        to_stderr: yes
        debug: off
        timestamp: on
        to_file: no
        to_syslog: yes
        syslog_facility: daemon
}

amf {
        mode: disabled
}

service {
        ver:       0
        name:      pacemaker
        use_mgmtd: yes
}

aisexec {
        user:   root
        group:  root
}

--- END openais.conf

Has anyone had high context switches (as seen in vmstat)

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  0      0 3193472 2570928 156592    0    0     1     0    6   11  0  1 99  0
 0  0      0 3193692 2570928 156592    0    0     0    20   62 18953  0  1 99  0
 0  0      0 3193628 2570928 156592    0    0     0     0   35 19088  0  1 99  0
 0  0      0 3193184 2570928 156592    0    0     0     0   48 19049  0  1 99  0
 0  0      0 3193792 2570928 156592    0    0     0     0   41 18947  0  1 99  0
 0  0      0 3193828 2570928 156592    0    0     0     0   46 19105  0  1 99  0
 1  0      0 3192480 2570928 156592    0    0     0     0   45 19087  0  1 99  0
 0  0      0 3193196 2570928 156592    0    0     0     0   27 18930  0  1 99  0

This is the behaviour I see while the system is idle. Please note that the system with openais-legacy stopped, stays around 500 cs

Is this normal?

Thanks,

Andreas