Re: CPU adjustment rate
So if IBM provides this, there must be an control block to get it from. O r does ESALPS the calculation by itself? Tobias.
Re: CPU adjustment rate
So the next question rises. When i am running on a 2094-718 with two dedicated IFLs, do i have to take the service units for a 718 or a 702? I suppose that none of them is the correct one - right? Regards, Tobias.
Re: CPU adjustment rate
IBM does publish service units per second of task time for a number of IBM zSeries systems in the MVS Initialization and Tuning Guide, available off of the IBM z/OS library web site. These values can be converted, with some unknown degree of validity, to MSU values, via the following formula: MSU = SU*P*3600/100 where SU is the service units per second mentioned above and P is the number of physical processors in the system. A very rough measurement of the MIPS provided per physical processor can be calculated from: MIPS = SU/48.5 and total MIPS from total_MIPS = MIPS * P These are all rough approximations or rules of thumbuse at your own risk. ;-) Thomas Kern wrote: Does IBM document the conversion algorithm for the MVS CPU to Service Units? If they do, we could do the computation for ourselves. /Tom Kern Schuh, Richard wrote: As far as I know, there never has been a defined measurement known as a service unit on VM; therefore, no way to convert from anything else to service units. If you want to define a service unit as n cpu seconds, then the conversion is straightforward. Regards, Richard Schuh -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Dave Jones Sent: Tuesday, November 27, 2007 7:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CPU adjustment rate Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QB RE -- DJ V/Soft -- DJ V/Soft
Re: CPU adjustment rate
Take your choice. The z/OS numbers from which these are derived show more overhead of running an MP environement than I would expect in a z/VM environment. So the 702 numbers are slightly high, and the 718 numbers slightly low. Tobias Doerkes wrote: So the next question rises. When i am running on a 2094-718 with two dedicated IFLs, do i have to take the service units for a 718 or a 702? I suppose that none of them is the correct one - right? Regards, Tobias.
CPU adjustment rate
Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QBRE
Re: CPU adjustment rate
Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QBRE -- DJ V/Soft
Re: CPU adjustment rate
As far as I know, there never has been a defined measurement known as a service unit on VM; therefore, no way to convert from anything else to service units. If you want to define a service unit as n cpu seconds, then the conversion is straightforward. Regards, Richard Schuh -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Dave Jones Sent: Tuesday, November 27, 2007 7:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CPU adjustment rate Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QB RE -- DJ V/Soft
Re: CPU adjustment rate
Does IBM document the conversion algorithm for the MVS CPU to Service Units? If they do, we could do the computation for ourselves. /Tom Kern Schuh, Richard wrote: As far as I know, there never has been a defined measurement known as a service unit on VM; therefore, no way to convert from anything else to service units. If you want to define a service unit as n cpu seconds, then the conversion is straightforward. Regards, Richard Schuh -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Dave Jones Sent: Tuesday, November 27, 2007 7:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CPU adjustment rate Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QB RE -- DJ V/Soft
Re: CPU adjustment rate
This is actually something that is provided by ESALPS under z/VM. Dave Jones wrote: Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QBRE
Re: CPU adjustment rate
IBM does provide this, ESALPS is pretty current with the processors recognized. Schuh, Richard wrote: As far as I know, there never has been a defined measurement known as a service unit on VM; therefore, no way to convert from anything else to service units. If you want to define a service unit as n cpu seconds, then the conversion is straightforward. Regards, Richard Schuh -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Dave Jones Sent: Tuesday, November 27, 2007 7:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CPU adjustment rate Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QB RE -- DJ V/Soft
Re: CPU adjustment rate
The current implementation in MVS allows an installation to provide weights, or coefficients, for the various components of a service unit. Therefore, there is no fixed number of cpu seconds per service unit that applies universally. There probably is a definition of the defaults somewhere. Google might give you the answer. Regards, Richard Schuh -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Thomas Kern Sent: Tuesday, November 27, 2007 8:50 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CPU adjustment rate Does IBM document the conversion algorithm for the MVS CPU to Service Units? If they do, we could do the computation for ourselves. /Tom Kern Schuh, Richard wrote: As far as I know, there never has been a defined measurement known as a service unit on VM; therefore, no way to convert from anything else to service units. If you want to define a service unit as n cpu seconds, then the conversion is straightforward. Regards, Richard Schuh -Original Message- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Dave Jones Sent: Tuesday, November 27, 2007 7:00 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: CPU adjustment rate Hi, Tobias. The short answer is no, there is no such conversion field in VM itself. Of course, if you are running a guest like MVS under VM, that support such a conversion, then that conversion will still work. Hope this helps. Tobias Doerkes wrote: Hi list. As far as i know VM only gives information about CPU usage by used CPU seconds. In MVS there is a so called CPU adjustment rate (rmctadjc) to convert CPU seconds into service units. Is there an aquivalent field in VM control blocks? Regards, Tobias Doerkes _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=Q B RE -- DJ V/Soft
