Linked by Thom Holwerda on Thu 26th Aug 2010 23:24 UTC
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RE[7]: Are they still stuck in GHz race?
by tylerdurden on Tue 31st Aug 2010 01:00
in reply to "RE[6]: Are they still stuck in GHz race?"




Member since:
2009-05-19
Do you guys even comprehend the impossibility of a single chip at that 45nm process with those cache sizes?
See the specs from IBM directly, or if you need a 3rd party check wikipedia:
http://en.wikipedia.org/wiki/IBM_z196_(microprocessor)
A 16 MB of L1 would be idiotic, since it could actually make things like context switches very costly with so much local data to flush in/out.
First of all, remember that Mainframes are designed to push I/O ops at unparalleled speeds. Their main focus forever was I/O performance, not processing speeds. That is why mainframe processors are not used in their super-computers, they are just not designed for raw calculations. Add to that, these machines are bundled with with some fast storage units - and you get ultra low wait times for data.
I've actually seen how these machines perform, Oracle RAC isn't a contender when comparing the I/O heavy DB operation performance these machines can achieve with DB2.