Linked by Thom Holwerda on Mon 17th Sep 2007 20:51 UTC
Oracle and SUN "Sun announced Niagara 2 the other day, an evolution of the older Niagara 1, now called the UltraSPARC T1. From the 10000-foot view, it all looks quite familiar, but once you delve into the details, it quickly becomes apparent that almost everything has changed."
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floating point unit pe core
by project_2501 on Mon 17th Sep 2007 23:38 UTC
project_2501
Member since:
2006-03-20

a major difference with the previous Niagara 1 is that the Niagara 2 has an FPU per core - previously each core competed for the same FPU.

many people, including myself, who did test evaluations for standard server apps (DNS, SMTP, LDAP) found than the Niagara 1 based systems performed much worse than Sun Opteron systems - because the apps were not sufficiently matched to the Niagara 1 hardware. i wonder if this changes with Niagara 2.

certainly virtualisation would benefit if each VM instance can have a core+FPU.

Reply Score: 1

RE: floating point unit pe core
by spotter on Tue 18th Sep 2007 00:14 in reply to "floating point unit pe core"
spotter Member since:
2005-07-06

Performance of the T1 processor really depends on the workload you throw at it. Every one of those you listed, we've thrown at it, and it has walked away hands down the winner. We're replacing the majority of our NetBackup infrastructure with T2000s, because they kicked everything else's rear ends up and down the evaluation track (Dell PE2950 and HP DL585 running either Windows or Linux). In one of our web-based application services, we're replacing V1280s with T2000s and seeing performance *increases*. For LDAP, we've seen 3:1 better performance over a V440 class system.

Haven't had a chance to play with LDom on the T5220, so I can't comment on how it changes the performance. However, considering that very few server workloads are actually that FP intensive, it rarely matters.

Reply Parent Score: 5