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Hi, I have a 6.3 guest running on a 6.3 host and the output from top seems strange to me. At least I did not expect this.
While in the guest on core is busy with i/o the host seems idle. Does anyone know why it is this way?
See the output from top below, first the one from guest, then host.
top - 14:12:35 up 12 min, 1 user, load average: 2.76, 2.28, 1.24 Tasks: 169 total, 1 running, 168 sleeping, 0 stopped, 0 zombie Cpu0 : 0.3%us, 0.7%sy, 0.0%ni, 0.0%id, 99.0%wa, 0.0%hi, 0.0%si, Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu3 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si,
top - 14:14:28 up 15 min, 1 user, load average: 0.79, 0.84, 0.50 Tasks: 238 total, 2 running, 236 sleeping, 0 stopped, 0 zombie Cpu0 : 5.7%us, 1.0%sy, 0.0%ni, 93.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu1 : 0.3%us, 0.3%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu2 : 0.7%us, 1.0%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu3 : 0.3%us, 0.3%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu4 : 3.0%us, 0.7%sy, 0.0%ni, 96.4%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu5 : 0.0%us, 0.7%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 1.0%si, Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si,
- -- Kind Regards, Markus Falb
If you are looking at load averages, keep in mind that represents the average number of processes in run state. If you've only given the guest one core, then it can have three processes in run state but that's only one process in run state on the host. So the load averages will be higher on the guest in that instance if there is no other load on the host.
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On Sat, 21 Jul 2012, Markus Falb wrote:
Date: Sat, 21 Jul 2012 14:40:33 +0200 From: Markus Falb markus.falb@fasel.at Reply-To: Discussion about the virtualization on CentOS
To: centos-virt@centos.org Subject: [CentOS-virt] top on host and guest
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Hi, I have a 6.3 guest running on a 6.3 host and the output from top seems strange to me. At least I did not expect this.
While in the guest on core is busy with i/o the host seems idle. Does anyone know why it is this way?
See the output from top below, first the one from guest, then host.
top - 14:12:35 up 12 min, 1 user, load average: 2.76, 2.28, 1.24 Tasks: 169 total, 1 running, 168 sleeping, 0 stopped, 0 zombie Cpu0 : 0.3%us, 0.7%sy, 0.0%ni, 0.0%id, 99.0%wa, 0.0%hi, 0.0%si, Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu3 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si,
top - 14:14:28 up 15 min, 1 user, load average: 0.79, 0.84, 0.50 Tasks: 238 total, 2 running, 236 sleeping, 0 stopped, 0 zombie Cpu0 : 5.7%us, 1.0%sy, 0.0%ni, 93.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu1 : 0.3%us, 0.3%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu2 : 0.7%us, 1.0%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu3 : 0.3%us, 0.3%sy, 0.0%ni, 99.3%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu4 : 3.0%us, 0.7%sy, 0.0%ni, 96.4%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu5 : 0.0%us, 0.7%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 1.0%si, Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si,
Kind Regards, Markus Falb
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Markus Falb -
Nanook