SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?


To: RDM who wrote (40511)10/31/1998 2:20:00 PM
From: Ali Chen  Respond to of 1573695
 
RDM <cache fill rate> You will be much more correct
if you meant the "cache latency and throughput".
By virtue of computing algorithms, the cache (on
average) is filled once but gets executed many
times, which is much more important for overall
performance.

Take care,
- Ali



To: RDM who wrote (40511)10/31/1998 2:53:00 PM
From: RDM  Respond to of 1573695
 
Upon reflection of your comments I would change my expression of
"fill rate" for "L2 cache processor access time". Hence, the L2 cache processor access time is less for the K6-3 than for the K6-2 since the cache is on chip.

While the benefit is to "cache throughput and latency" this description does not directly point to the architectural difference between the K6-2 and the K6-3.



To: RDM who wrote (40511)10/31/1998 3:35:00 PM
From: Scumbria  Read Replies (1) | Respond to of 1573695
 
RDM,

I'm not sure that "fill rate" is the correct concept for your argument. The critical data from the L2 bypasses the cache and goes directly to the core. A cache fill buffer holds the incoming L2 data until the a complete cache line is available, then it is written into the L1 in a single cycle.

The important concept is "critical latency" which is better for an on-chip L2 than an off-chip L2.

Scumbria