Hi,
I'm trying to understand the polygraph methodology (in particular, I'm
interested in the polymix-4 workload). I have a few questions:
1. The function of the fill phases (framp, fill, fexit) and the top phases
is straightforward. The website mentions that the most interesting
measurements are taken from the top2 phase. Presumably, then, the
other phases (inc, dec, and idle) for the side-effects they cause. Are
they designed to induce particular side effects, or are they included to
maintain fidelity with real workloads?
2. The discussion of realism mentions that zipf popularity is not used in
the standard workloads. The reason is that the combination of zipf
popularity with other workload characteristics yields unrealistic memory
hit ratios. Is there a more detailed explanation of what the
interactions are, and why this happens?
3. The PGL documentation describes a Session object. Is this used in any
of the standard workloads (grepping through the files suggests it is not)?
If not, are there plans to incorporate it into standard workloads?
Thanks.
-- public key: finger mukesh@cs.cmu.edu fingerprint: BDAB AB7A ADFB 9229 1BD8 45FD BE21 850C E36C D4AA
This archive was generated by hypermail 2b29 : Mon Feb 06 2006 - 12:00:21 MST