So, would this be right? Linux steal time = processing time for other VMBKs + non-SIE processing for own VMBK
Non-SIE processing for own VMBK = ( TV ratio - 1 ) * SIE emulation time for own VMBK Or is there yet another component time in there? Best regards, Pieter Harder [email protected] tel +31-73-6837133 / +31-6-47272537 -----Oorspronkelijk bericht----- Van: Linux on 390 Port [mailto:[email protected]] Namens Rob van der Heij Verzonden: dinsdag 30 december 2008 21:56 Aan: [email protected] Onderwerp: Re: VMSTAT steals On Tue, Dec 30, 2008 at 8:53 PM, Shawn Wells <[email protected]> wrote: > Steal time is the percentage of time a virtual CPU waits for a real CPU > while the hypervisor (in this case, z/VM) is servicing another virtual > processor. Virtual CPU time is really SIE emulation time. So the steal time also includes the time CP is processing on behalf of this virtual machine (sometimes referred to as CP overhead). This includes I/O translation, VDISK, paging, etc. While for a steady workload this can be a fixed percentage, in extreme cases it will make the Linux view very different from the VM metrics. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 Brabant Water N.V. Postbus 1068 5200 BC 's-Hertogenbosch http://www.brabantwater.nl Handelsregister: 16005077 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
