Major restructuring to switch build system from old scripts to GNU Automake.

doc/benchmark.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+#
+# Benchmark the read/write performance of pv by looking at the number of
+# read() and write() calls and the average amount of data transferred each
+# time, as suggested by Ville Herva <Ville.Herva@iki.fi>.
+#
+
+test_input=$(mktemp /tmp/pvbench1XXXXXX)
+strace_output=$(mktemp /tmp/pvbench2XXXXXX)
+
+trap 'rm -f ${test_input} ${strace_output}' EXIT
+
+pv=${pv:-./pv}
+test -x "${pv}" || pv="pv"
+
+dd if=/dev/zero of="${test_input}" bs=1k count=1k >/dev/null 2>&1
+
+echo -e "Buf(k)\tRate(k)\tReads\tRsize\tWrites\tWsize"
+
+for ((buffer=100; buffer<=1000; buffer+=100)); do
+	for ((rate=100; rate<=1000; rate+=100)); do
+		rateparm="-L ${rate}k"
+		test ${rate} -eq 0 && rateparm=""
+		strace -tt -o "${strace_output}" \
+		  "${pv}" "${rateparm}" -B "${buffer}k" \
+		  -f < "${test_input}" > /dev/null 2>&1
+		rdata=$(
+		  awk '$2~/^read\(0,/{c++;t+=$NF}END{print c "\t" t/c}' \
+		   "${strace_output}"
+		)
+		wdata=$(
+		   awk '$2~/^write\(1,/{c++;t+=$NF}END{print c "\t" t/c}' \
+		   "${strace_output}"
+		)
+		echo -e "${buffer}\t${rate}\t${rdata}\t${wdata}"
+	done
+done
+
+# EOF