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[stor4nfv.git] / src / ceph / src / dmclock / benchmark / README.md

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-# dmclock benchmarking
-
-**IMPORTANT**: now that K_WAY_HEAP is no longer allowed to have the
-value 1, the shell and Python scripts that generate the PDFs no longer
-work exactly correctly. Some effort to debug is necessary.
-
-This directory contains scripts to evaluate effects of different
-branching-factors (k=1 to k=11) in the IndirectIntrusiveHeap
-data-structure. IndirectIntrusiveHeap is now a k-way heap, so finding
-an ideal value for k (i.e., k=2 or k=3) for a particular work-load is
-important. Also, it is well-documented that the right choice of
-k-value improves the caching behaviour [Syed -- citation needed
-here]. As a result, the overall performance of an application using
-k-way heap increases significantly [Syed -- citation needed here].
-
-A rule of thumb is the following:
-       if number of elements are <= 6, use k=1
-       otherwise, use k=3.
-
-## Prerequisites
-
-requires python 2.7, gnuplot, and awk.
-  
-## Running benchmark
-
-./run.sh [name_of_the_output] [k_way] [repeat] # [Syed -- last two command line args do not work]
-
-The "run.sh" script looks for config files in the "configs" directory,
-and the final output is generated as
-"name_of_the_output.pdf". Internally, "run.sh" calls other scripts
-such as data_gen.sh, data_parser.py, and plot_gen.sh.
-
-## Modifying parameters
-
-To modify k-value and/or the amount of times each simulation is
-repeated, modify the following two variables in "run.sh" file:
-
-    k_way=[your_value]
-    repeat=[your_value]
-
-For example, k_way=3 means, the benchmark will compare simulations
-using 1-way, 2-way, and 3-way heaps.