From bfc5ce4bc01e5eb28969eefcc01ecfefa2601fdf Mon Sep 17 00:00:00 2001 From: johannst Date: Wed, 31 Jan 2024 22:52:33 +0000 Subject: deploy: f3e631f7539c71686d1e336756c9c0fcd0b587ad --- tools/gnuplot.html | 306 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 tools/gnuplot.html (limited to 'tools/gnuplot.html') diff --git a/tools/gnuplot.html b/tools/gnuplot.html new file mode 100644 index 0000000..a794455 --- /dev/null +++ b/tools/gnuplot.html @@ -0,0 +1,306 @@ + + + + + + gnuplot - Notes + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + + + + + + + + + + + + + + + + + + +
+ +
+ + + + + + + + +
+
+

gnuplot (1)

+
# Launch interactive shell.
+gnuplot
+
+# Launch interactive shell.
+gnuplot [opt]
+  opt:
+    -p ................ persist plot window
+    -c <file> ......... run script file
+    -e "<cmd1>; .." ... run cmd(s)
+
+

Frequently used configuration

+
# Plot title.
+set title "the plot"
+
+# Labels.
+set xlabel "abc"
+set ylabel "def"
+
+# Output format, 'help set term' for all output formats.
+set term svg
+# Output file.
+set output "out.svg"
+
+# Make axis logarithmic to given base.
+set logscale x 2
+
+# Change separator, default is whitespace.
+set datafile separator ","
+
+

Plot

+
# With specific style (eg lines, linespoint, boxes, steps, impulses, ..).
+plot "<data_file>" with <plot_style>
+
+> cat data.txt
+1 1 3
+2 2 2
+3 3 1
+4 2 2
+
+# Plot specific column.
+plot "data.txt" using 1:2, "data.txt" using 1:3
+# Equivalent using the special file "", which re-uses the previous input file.
+plot "data.txt" using 1:2, "" using 1:3
+
+# Plot piped data.
+plot "< head -n2 data.txt"
+
+# Plot with alternate title.
+plot "data.txt" title "moose"
+
+

Example: multiple data sets in on plot

+
# file: mem_lat.plot
+
+set title  "memory latency (different strides)"
+set xlabel "array in KB"
+set ylabel "cycles / access"
+
+set logscale x 2
+
+plot "stride_32.txt"  title "32"  with linespoints, \
+     "stride_64.txt"  title "64"  with linespoints, \
+     "stride_128.txt" title "128" with linespoints, \
+     "stride_256.txt" title "256" with linespoints, \
+     "stride_512.txt" title "512" with linespoints
+
+

On Linux x86_64, mem_lat.c provides an example which can +be run as follows.

+
gcc -o mem_lat mem_lat.c -g -O3 -Wall -Werror
+
+for stride in 32 64 128 256 512; do \
+    taskset -c 1 ./mem_lat 128 $stride | tee stride_$stride.txt ; \
+done
+
+gnuplot -p -c mem_lat.plot
+
+ +
+ + +
+
+ + + +
+ + + + + + + + + + + + + + + + + + +
+ + -- cgit v1.2.3