Hi, Any idea how much difference this will make? I guesss it depends on how busy the server is, but I'm wondering if it's worth trying to 'spread' the guest ldoms on a server across the cpus in the best way possible. Any thoughts? Tony
Forwarded conversation Subject: [ldoms-discuss] IO Domains and CPU socket affinity ------------------------ From: *Ben Taylor* <[email protected]> Date: Tue, May 17, 2011 at 3:14 PM To: [email protected] I am standing up an IO Domain LDOM on a T5440. I remember seeing some things in the documentation about Socket affinity and PCI buses. I am using PCI_2 and 64 threads (1 socket), but am just wondering if there's something I should be doing to better align the threads with the PCI bus, or am I chasing a rube goldberg? Ben _______________________________________________ ldoms-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss ---------- From: *Hung-ShengTsao (Lao Tsao) Ph.D.* <[email protected]> Date: Tue, May 17, 2011 at 3:37 PM To: [email protected] http://www.fujitsu.com/downloads/SPARCE/whitepapers/T5440-wp-e-200907.pdf show you tha arch diagram Since , AFAIK, you can not assign specific vcpu to LDOM domain IMHO, you are chasing a rube goldberg!! _______________________________________________ ldoms-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss ---------- From: *[email protected]* <[email protected]> Date: Tue, May 17, 2011 at 3:44 PM To: [email protected] True - but you can get the I/O domain to be where you want it by a bit of cunning. If we have a freshly installed system with a control domain to be say 8 cpus it will use cpu 0-7. We want the I/O domain to be on the second socket ( cpus 64-127) so we need to fill the gap with a dummy domain. ldm create dummy ldm set-vcpu 56 dummy ldm set-mem 1g dummy ldm bind dummy then create i/O domain ldm create secondary ldm set-vcpu 8 secondary ldm set-mem 4g secondary ldm bind secondary then delete dummy ldm unbond dummy ldm destroy dummy. -- <http://www.oracle.com/> Terry Smith | Principal Sales Consultant Phone: +44 118 924 000 | Mobile: +44 7802212151 Oracle UK & Ireland Hardware Systems Sales Oracle Parkway | Thames Valley Park | Reading | RG6 1RA | United Kingdom ORACLE Corporation UK Ltd is a company incorporated in England & Wales | Company Reg. No. 1782505 | Reg. office: Oracle Parkway, Thames Valley Park, Reading RG6 1RA Oracle is committed to developing practices and products that help protect the environment [image: Oracle Server & Storage Systems]<http://www.oracle.com/goto/uk/systems> _______________________________________________ ldoms-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss ---------- From: *Hung-ShengTsao (Lao Tsao) Ph.D.* <[email protected]> Date: Tue, May 17, 2011 at 3:48 PM To: [email protected] yes, but AFAIK, after the system reboot these vcpu will change, are I correct? regards _______________________________________________ ldoms-discuss mailing list _______________________________________________ ldoms-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss ---------- From: *Ben Taylor* <[email protected]> Date: Tue, May 17, 2011 at 3:56 PM To: "[email protected]" <[email protected]> Cc: [email protected] On Tue, May 17, 2011 at 2:44 PM, [email protected] Funny, that's what I've done. I'm just not sure after deleting the "dummy" that the appropriate CPU's are still in affinity with the PCI_2 after a reboot. ---------- From: *[email protected]* <[email protected]> Date: Tue, May 17, 2011 at 4:17 PM To: [email protected] Not unless you unbind the domain. T _______________________________________________ ldoms-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/ldoms-discuss
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