Thursday, August 9, 2007
Wednesday, August 8, 2007
From the webcast on Sun's page, I found the following interesting information on T2 chip:
One major difference between T2 and T1 is that T2 has a floating point unit on each core. T1 had one such unit for the entire chip that made it practically useless for floating-point intensive tasks. T2 thus seems to have taken care of that limitation. T2 threads run at 1.4 GHz.
For crypto intensive tasks there is a cryptographic processor unit on each core. Also, there are two PCI express I/O ports on the chip as well as integrated 10 Gb Ethernet.
Sun aims to sell this chip to other vendors as well if they want to use it in their servers. This is a departure from its earlier policy where it used its chips only in its servers and sold those servers.
This chip seems great for multi-threaded applications written in languages such as Java.
One thing that was funny in the webcast was that T2 was getting marketed as the fastest processor at 89.6 GHz. It was simply calculated by multiplying 64 by 1.4 GHz.
It was like saying a train with 10 coaches running at 100 miles/hr the fastest vehicle at 1000 km/hr!
A few times during the webcast it was mentioned that 64 Operating systems could run simultaneously in 64 threads due to LDom technology. I think they were talking about zones, and not really different OS's. Or is it possible to really run different OS's in that way? I think not but correct me if I am wrong.
UltraSparc T2 sure is a great chip with energy efficiency and should give good throughput for well written applications, at a very low form-factor in a data center.
Sunday, August 5, 2007