🚀 go-pugleaf

In article <1666@hoptoad.uucp> gnu@hoptoad.uucp (John Gilmore) writes:
>The January 1987 (vol 38 #1) issue of the H-P Journal contains an
>article on the HP3000 series 70 cache, which goes into great detail on
>how they instrumented the older models to determine what cache
>parameters to change in the new model.   One quote from the article,
>and a reference:
>"...it has been shown that operating systems have rather poor locality
>compared to user programs."  They don't give a derivation for this finding.
>The reference:
>A. J. Smith, "Cache Evaluation and the Impact of Workload Choice",...

Another good reference is:
	Douglas W. Clarke and Joel S. Emer, " Performance of the VAX 11/780
Translation Buffer: Simulation and Measurement", ACM Trans. on Computer
Systems 3(1), pp31-62 (Feb 1985).

Of course, this is about locality in the TLB, which is different from that
of cache locality.  However, it does give good numbers and analysis.
[Kernels are worse in both cases, as it happens.]
-- 
-john mashey	DISCLAIMER: <generic disclaimer, I speak for me only, etc>
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