Alex, the following was posted a few weeks ago to VMESA-L We are pleased to provide details on the upcoming joint meeting of the Canada VM and VSE User Groups. The meeting will take place on Friday May 10 at 330 University Avenue in Toronto from 8:30 a.m. until approximately 4 p.m. 330 University is just north of Queen. You can't miss it since it is the Canada Life building with the weather tower on the roof.
We will be having joint sessions in the morning, and special interest breakout sessions in the afternoon. Advance admission is $25 for VSE members, and $40 for VM members. At the door registrations are $40. Enjoy A.M. coffee, an A.M. break, a catered lunch, and a P.M. snack break that are included in the registration price. What a deal! Joint sessions will include an IBM s390 update, VM update, VSE update, an quick review of the WAVV conference, and Linux for s390 update from IBM. >From: Alex deVries <[EMAIL PROTECTED]> >Organization: Linuxcare > >Barton, > >Where can I find more details on the Toronto presentation? > >- Alex > >Barton Robinson wrote: >> >> Yes, I do. >> >> >virtual machines method of measuring time does anybody know of a >> >Linux utility for performance measurement that understands that >> >it is working under VM. thanks >> >> TOP, SAR, VMSTAT, etc, that produce CPU numbers from Linux >> on s/390 on either VM or on LPAR with undedicated processors >> will have incorrect CPU times. The sampling technique used by Linux >> to determine CPU times is very dependant on dedicated resources. >> Which of course does not happen on VM. As load increases, TOP >> and any other Linux based accounting will become MORE incorrect. >> >> The presentation I've just given at WAVV and SHARE actually >> shows 10 linux servers, each thinking they were using 100% of >> available resource. Thus all the CPU numbers provided by Linux >> were off by a factor of 10 - what's an order of magnitude >> between friends, eh? This presentation will be given at the >> UK CMG May 21 for Clive and friends.... And Toronto May 10th. >> and.... >> >> The simple solution: (Warning, vendor advertisement follows) ESALPS >> (Linux Performance Suite) will take the process and Linux CPU >> numbers, and if/when running in a virtual machine, will prorate >> the Linux numbers to the VM numbers, thus able to report >> accurate CPU utilizations by process and for each linux server. >> You can see http://velocitysoftware.com/esalps.html >> for more information. >> Simply, you absolutely need the VM information integrated with >> the Linux information to provide an accurate performance or >> accounting picture. >> >> >From: "C Jordan (Clive)" <[EMAIL PROTECTED]> >> > >> >We are trying to measure performance of Linux guests under zVM >> >using the tools available on Linux ( top vmstat sar ) along with >> >monitor data from CP. In an unconstrained VM system the cpu >> >usage as measured by VM and Linux is about the same . If we then >> >start up a looping virtual machine to act as a cpu soak these >> >figures diverge quite a lot . Rob van der Heij touched on this >> >over two years ago in this forum " IMHO the BogoMips should at >> >least be corrected for what PR/SM or CP say your unvoluntary >> >wait was. I would not be surprised to find more areas in Linux >> >where elapsed time is assumed to be equal to CPU time. ". >> > >> >Whilst accepting that this is probably a combination of the way >> >the CP scheduler is handling the users and also the Linux >> >virtual machines method of measuring time does anybody know of a >> >Linux utility for performance measurement that understands that >> >it is working under VM. thanks >> > >> >Clive Jordan >-- >Alex deVries, Principal Solutions Architect, The Puffins at Linuxcare >613.562.2759 tel >[EMAIL PROTECTED], http://www.linuxcare.com/ >Linuxcare, Putting open source to work. "If you can't measure it, I'm Just NOT interested!"(tm) /************************************************************/ Barton Robinson - CBW Internet: [EMAIL PROTECTED] Velocity Software, Inc Mailing Address: 196-D Castro Street P.O. Box 390640 Mountain View, CA 94041 Mountain View, CA 94039-0640 VM Performance Hotline: 650-964-8867 Fax: 650-964-9012 Web Page: WWW.VELOCITY-SOFTWARE.COM /************************************************************/
