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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?


To: Saturn V who wrote (65013)7/12/1999 9:25:00 PM
From: Ali Chen  Read Replies (3) | Respond to of 1579906
 
Saturn, <I shall clarify my statement. The K-6 and K-62 will become memory starved at very high MHZ because of sharing a common bus for L1 & L2.>
Perhaps you shall clarify also what metric do you
use to characterize the level of memory starvation,
and what kind of workload are you talking about.

Second, as it is well known, the market does not
inderstand the "performance improvements", does not
believe in benchmarks, and therefore does not care
about it much. What the market does care for is a
very simple metrics like MHz, cu.in, or alike.
As you have seen, even some Product Engineers
cannot sometimes compare what is bigger and what
is smaller, and how many times smaller. What
would you expect from them if the performance
is defined on a multidimensional space.
Therefore, as Jim McMannis says, "MHz sells".

Take care,
- Ali



To: Saturn V who wrote (65013)7/12/1999 10:59:00 PM
From: fyo  Read Replies (1) | Respond to of 1579906
 
Saturn V - Re: I shall clarify my statement. The K-6 and K-62 will become memory starved at very high MHZ because of sharing a common bus for L1 & L2.

L1 and L2 do not share the same bus. The system memory and the L2 do. This is a problem in that the L2 cache frequency is static - as opposed to architectures, where the L2 is a fraction of the CPU frequency. (Thus the architecture would, all other things being equal, scale worse with frequency).

--fyodor