examples: add latency examples

examples/latency/README.md

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+This example shows the latency measurement of the [writeheavy](../writeheavy/)
+and [readpopular](../readpopular/) examples. Their descriptions can be found in their own
+directories.
+
+5950X CPU 0-15 results (writeheavy, [pdf](latency-writeheavy.pdf)):
+
+![latency-writeheavy](latency-writeheavy.png)
+
+
+5950X CPU 0-15 results (readpopular, [pdf](latency-readpopular.pdf)):
+
+![latency-readpopular](latency-readpopular.png)

examples/latency/plot.gpl

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+set terminal pdf size 10,3
+set xlabel "Threads"
+set key left top
+
+set output "latency-writeheavy.pdf"
+set multiplot layout 1,3
+set ylabel "Average Latency (ns)"
+plot [0:17] [0:] \
+    "chashmap-writeheavy.txt" using 2:20 with lp ti "chashmap",\
+    "contrie-writeheavy.txt" using 2:20 with lp ti "contrie",\
+    "dashmap-writeheavy.txt" using 2:20 with lp ti "dashmap",\
+    "flurry-writeheavy.txt" using 2:20 with lp ti "flurry",\
+    "papaya-writeheavy.txt" using 2:20 with lp ti "papaya",\
+    "scchashmap-writeheavy.txt" using 2:20 with lp ti "scchashmap",\
+    "mutex_hashmap-writeheavy.txt" using 2:20 with lp ti "mutexhashmap",\
+    "rwlock_hashmap-writeheavy.txt" using 2:20 with lp ti "rwlockhashmap"
+
+set ylabel "P99 Latency (ns)"
+plot [0:17] [0:] \
+    "chashmap-writeheavy.txt" using 2:26 with lp ti "chashmap",\
+    "contrie-writeheavy.txt" using 2:26 with lp ti "contrie",\
+    "dashmap-writeheavy.txt" using 2:26 with lp ti "dashmap",\
+    "flurry-writeheavy.txt" using 2:26 with lp ti "flurry",\
+    "papaya-writeheavy.txt" using 2:26 with lp ti "papaya",\
+    "scchashmap-writeheavy.txt" using 2:26 with lp ti "scchashmap",\
+    "mutex_hashmap-writeheavy.txt" using 2:26 with lp ti "mutexhashmap",\
+    "rwlock_hashmap-writeheavy.txt" using 2:26 with lp ti "rwlockhashmap"
+
+set ylabel "P999 Latency (ns)"
+plot [0:17] [0:] \
+    "chashmap-writeheavy.txt" using 2:28 with lp ti "chashmap",\
+    "contrie-writeheavy.txt" using 2:28 with lp ti "contrie",\
+    "dashmap-writeheavy.txt" using 2:28 with lp ti "dashmap",\
+    "flurry-writeheavy.txt" using 2:28 with lp ti "flurry",\
+    "papaya-writeheavy.txt" using 2:28 with lp ti "papaya",\
+    "scchashmap-writeheavy.txt" using 2:28 with lp ti "scchashmap",\
+    "mutex_hashmap-writeheavy.txt" using 2:28 with lp ti "mutexhashmap",\
+    "rwlock_hashmap-writeheavy.txt" using 2:28 with lp ti "rwlockhashmap"
+
+unset multiplot
+set output "latency-readpopular.pdf"
+set multiplot layout 1,3
+set ylabel "Average Latency (ns)"
+plot [0:17] [0:] \
+    "chashmap-readpopular.txt" using 2:20 with lp ti "chashmap",\
+    "contrie-readpopular.txt" using 2:20 with lp ti "contrie",\
+    "dashmap-readpopular.txt" using 2:20 with lp ti "dashmap",\
+    "flurry-readpopular.txt" using 2:20 with lp ti "flurry",\
+    "papaya-readpopular.txt" using 2:20 with lp ti "papaya",\
+    "scchashmap-readpopular.txt" using 2:20 with lp ti "scchashmap",\
+    "mutex_hashmap-readpopular.txt" using 2:20 with lp ti "mutexhashmap",\
+    "rwlock_hashmap-readpopular.txt" using 2:20 with lp ti "rwlockhashmap"
+
+set ylabel "P99 Latency (ns)"
+plot [0:17] [0:] \
+    "chashmap-readpopular.txt" using 2:26 with lp ti "chashmap",\
+    "contrie-readpopular.txt" using 2:26 with lp ti "contrie",\
+    "dashmap-readpopular.txt" using 2:26 with lp ti "dashmap",\
+    "flurry-readpopular.txt" using 2:26 with lp ti "flurry",\
+    "papaya-readpopular.txt" using 2:26 with lp ti "papaya",\
+    "scchashmap-readpopular.txt" using 2:26 with lp ti "scchashmap",\
+    "mutex_hashmap-readpopular.txt" using 2:26 with lp ti "mutexhashmap",\
+    "rwlock_hashmap-readpopular.txt" using 2:26 with lp ti "rwlockhashmap"
+
+set ylabel "P999 Latency (ns)"
+plot [0:17] [0:] \
+    "chashmap-readpopular.txt" using 2:28 with lp ti "chashmap",\
+    "contrie-readpopular.txt" using 2:28 with lp ti "contrie",\
+    "dashmap-readpopular.txt" using 2:28 with lp ti "dashmap",\
+    "flurry-readpopular.txt" using 2:28 with lp ti "flurry",\
+    "papaya-readpopular.txt" using 2:28 with lp ti "papaya",\
+    "scchashmap-readpopular.txt" using 2:28 with lp ti "scchashmap",\
+    "mutex_hashmap-readpopular.txt" using 2:28 with lp ti "mutexhashmap",\
+    "rwlock_hashmap-readpopular.txt" using 2:28 with lp ti "rwlockhashmap"

examples/latency/run.sh

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+#!/bin/bash
+
+DIR="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
+
+cargo +stable build --profile release-lto --all-features
+
+STORE_DIR=$DIR/../../presets/stores
+
+STORES="chashmap contrie dashmap flurry papaya scchashmap mutex_hashmap rwlock_hashmap"
+
+for s in $STORES; do
+    for b in readpopular writeheavy; do
+        benchmark=$DIR/../$b/$b.toml
+        echo $s-$b
+        rm $s-$b.txt 2>/dev/null
+        for t in `seq 1 16`; do
+            data="$(env global.latency=true global.threads=$t cargo +stable run --profile release-lto --all-features -- bench -s $STORE_DIR/$s.toml -b $benchmark 2>/dev/null)"
+            echo "threads $t $data" | tee -a $s-$b.txt
+        done
+    done
+done
+
+gnuplot $DIR/plot.gpl