Hi Jorge, I'll give it a try ;-) Please see inline.
Jorge Chiang - Oracle wrote: > 1) How can I get an overall view of the performance of a T5240 when > using LDoms? Is there a tool to gather performance data on the control > and guest LDoms and give me a "big picture" view? Performance is always an attribute of the application, not the platform. If you are looking for platform utilization, you might try "ldm list" on the control domain to get a big picture of the CPU utilization of all domains. > 2) When debugging performance issues in an LDom, is there a way to trace > through from the application in the guest LDom to the external interface > (NIC or FC HBA) to isolate one guest LDom's traffic from the traffic > generated by other LDoms? The virtualization components (vSwitch, vDisk Server, etc.) are transparent for the guests. Their service endpoints (vnet, vdisk device drivers) in the guests are the furthest you can trace using Solaris from within a guest, at least afaik. In the IO domains or outside the chassis, you can of course monitor the MAC-addresses of the guests, at least wrt network traffic. For normal debugging, you can treat a vSwitch just like a regular ethernet component. For disk IO, you'll likely need to monitor service-times both in the guest and in the IO-domain, correlating what you know about the disk backend. No easy wins to be expected. I'd hope for someone from engineering on this list to elaborate a bit more on this point. > 3) What are the key performance issues that I should be looking for in > the Control and IO Domains? I suspect that all the work is being done > at the Kernel level with the vdsdev/vdisk and vsw/vnet modules and I > have no idea how to measure/monitor those. Yes and no. Make sure you have enough CPU (use mpstat, look for at least some idle time). If using ZFS in the IO domains, make sure you have sufficient RAM for the ARC. However, some of the work is being done in the hypervisor, which borrows CPU cycles from these domains. This does *not* show up in Solaris. hth stefan -- Stefan Hinker Systems LOB - Systems & Performance Sun Microsystems GmbH Tel: +49 6103 752-300 Brandenburger Str. 2-6 Stefan.Hinker at Sun.COM D-40880 Ratingen http://www.sun.de/ http://blogs.sun.com/cmt --------------------------------------------------------------------------- Sitz der Gesellschaft: Sun Microsystems GmbH, Sonnenallee 1, D-85551 Kirchheim-Heimstetten Amtsgericht Muenchen: HRB 161028 Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels Vorsitzender des Aufsichtsrates: Martin Haering -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 6110 bytes Desc: S/MIME Cryptographic Signature URL: <http://mail.opensolaris.org/pipermail/ldoms-discuss/attachments/20100308/bb92fedb/attachment-0001.bin>
