added instrumentation for disk access. Useful to benchmark disk cache performance
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disk_access.gnuplot
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7
disk_access.gnuplot
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set term png size 1200,700
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set output "disk_access.png"
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set xrange [0:*]
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set xlabel "time (ms)"
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set ylabel "disk offset"
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set key box
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plot "disk_access.log" using 1:3 title "disk access locations" with steps
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