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Bigger caches ? Where ?

Bigger caches ? Where ?

Posted Feb 13, 2008 20:23 UTC (Wed) by hmh (subscriber, #3838)
In reply to: Bigger caches ? Where ? by man_ls
Parent article: vmsplice(): the making of a local root exploit

In mainstream consumer CPUs, maybe the clocks have stabilized (which IS a good thing, we
already waste too much power just to do office work).

Look at the IBM Power6 for some high-clock cores...


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Bigger caches ? Where ?

Posted Feb 21, 2008 9:53 UTC (Thu) by renox (subscriber, #23785) [Link]

>Look at the IBM Power6 for some high-clock cores...

Except that apparently they had a lot of difficulty ramping up the clock..
Plus their CPU does *in order* integer processing which induce a loss of efficiency..

It'd be interesting to have a study which analyse whether going in order for integer
processing to increase the clock really did improve performance or if it was just a marketing
gimmick a la P4.

Power 6 clock high-score and real performance

Posted Feb 23, 2008 17:14 UTC (Sat) by anton (subscriber, #25547) [Link]

It'd be interesting to have a study which analyse whether going in order for integer processing to increase the clock really did improve performance
Take a look at SPEC CPU 2006 results. Last I looked, a 4.7GHz Power6 had similar speed to a 3GHz Core 2 Duo 6850 in both SPECint2006 and SPECfp2006 results.


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