Oh great, so it seem that you can get more ios with more vm. (It's become interesting for me :)
What are you exact xeon models ? same server model,bios options ? what happen on the dual xeon, if you shutdown some cores ? echo 0 > /sys/devices/system/cpu/cpuX/online also, does pining help on dual xeon ? ----- Mail original ----- De: "Stefan Priebe - Profihost AG" <[email protected]> À: "Alexandre DERUMIER" <[email protected]> Cc: [email protected] Envoyé: Vendredi 9 Novembre 2012 16:42:09 Objet: Re: [pve-devel] less cores more iops / speed Am 09.11.2012 15:49, schrieb Alexandre DERUMIER: > Maybe one last question (sorry ;) > > Do you have tried to launch 2 fio test from 2 differents kvm host at the same > time ? > > If yes, do you have more io or do you have half of speed on each fio test ? Only one VM active on a Single Xeon 3.6Ghz: write: io=6024MB, bw=68519KB/s, iops=17129, runt= 90025msec read : io=6057MB, bw=68891KB/s, iops=17222, runt= 90026msec write: io=71540MB, bw=808308KB/s, iops=197, runt= 90630msec read : io=147096MB, bw=1631MB/s, iops=407, runt= 90162msec Only one VM active on a Dual Xeon 2.5Ghz: write: io=2224MB, bw=25285KB/s, iops=6321, runt= 90070msec read : io=2033MB, bw=23108KB/s, iops=5777, runt= 90078msec write: io=50900MB, bw=574235KB/s, iops=140, runt= 90767msec read : io=84228MB, bw=954499KB/s, iops=233, runt= 90361msec Both VMs active (doing each test in parallel): VM 1: write: io=5376MB, bw=61112KB/s, iops=15277, runt= 90086msec read : io=6092MB, bw=69292KB/s, iops=17323, runt= 90028msec write: io=67724MB, bw=766012KB/s, iops=187, runt= 90533msec read : io=160200MB, bw=1776MB/s, iops=444, runt= 90187msec VM 2: write: io=2351MB, bw=26719KB/s, iops=6679, runt= 90083msec read : io=2190MB, bw=24899KB/s, iops=6224, runt= 90081msec write: io=48320MB, bw=545652KB/s, iops=133, runt= 90680msec read : io=88136MB, bw=999571KB/s, iops=244, runt= 90290msec Right now i've no idea why the Dual Xeon is slower at all / in general. Stefan _______________________________________________ pve-devel mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
