Some examples to use the script to generate small tasks workloads:
1. to generate a workload with 4 threads, 10% load and 30ms period
$ ./small_task_gen -t 4 -l 10 -p 3
2. to generate a workload with 3 threads, 15% load and random tick-aligned
period
$ ./small_task_gen -t 3 -l 15 -r --aligned
3. to generate a workload with 5 threads, 20% load and random non-tick-aligned
period
$ ./small_task_gen -t 5 -l 20 -r --unaligned
---
doc/examples/small_task_gen | 117 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 117 insertions(+)
create mode 100755 doc/examples/small_task_gen
diff --git a/doc/examples/small_task_gen b/doc/examples/small_task_gen
new file mode 100755
index 0000000..ba74753
--- /dev/null
+++ b/doc/examples/small_task_gen
@@ -0,0 +1,117 @@
+#!/usr/bin/env python
+
+import sys
+import getopt
+import random
+
+outfile = "small_tasks.json"
+tasks = None
+loading = None
+period = None
+randomized = None
+aligned = None
+
+
+def usage():
+ print "Usage:"
+ print sys.argv[0] + " -t <number of tasks>"
+ print "\t\t -l <percentage of task loading> (1 - 100)"
+ print "\t\t -p <fixed period in ms>"
+ print "\t\t -r [--aligned | --unaligned] (randomize periods of tasks)"
+ print "\t\t -o <output JSON file name> (default: small_tasks.json)"
+ return
+
+
+def parse_options():
+ global outfile
+ global tasks
+ global loading
+ global period
+ global randomized
+ global aligned
+
+ try:
+ opts, args = getopt.getopt(sys.argv[1:], "t:l:o:p:rh",
+ ["aligned", "unaligned"])
+ except getopt.GetoptError:
+ usage()
+ sys.exit(2)
+
+ for o, a in opts:
+ if o == "-t":
+ tasks = int(a)
+ print "number of tasks: %d" % tasks
+ if o == "-l":
+ loading = int(a)
+ print "task loading: %d" % loading
+ if o == "-o":
+ outfile = a;
+ print "output workload JSON file: " + outfile
+ if o == "-p":
+ period = int(a)
+ print "period of tasks: %d" % period
+ if o == "-r":
+ randomized = True
+ print "randomized: %r" % randomized
+ if o == "--aligned":
+ if aligned == False:
+ usage()
+ sys.exit(2)
+ aligned = True
+ print "aligned: %r" % aligned
+ if o in "--unaligned":
+ if aligned == True:
+ usage()
+ sys.exit(2)
+ aligned = False
+ print "aligned: %r" % aligned
+ if o == "-h":
+ usage()
+ sys.exit(2)
+
+ if not period is None and not randomized is None:
+ usage()
+ sys.exit(2)
+
+ if tasks is None or (period is None and randomized is None):
+ usage()
+ sys.exit(2)
+
+ return
+
+
+def generate_workload():
+ try:
+ f = open(outfile, "w")
+ except IOError:
+ print "WARN: Unable to open " + infile
+ sys.exit(2)
+
+ f.write("{\n")
+ f.write("\t\"tasks\" : {\n")
+
+ for i in range(0, tasks):
+
+ if randomized is None:
+ period_ns = period * 1000
+ else:
+ period_ns = random.randrange(1, 6) * 10000 # random tick-aligned
period from 10ms~50ms
+ if aligned == False: # add a period offset randomly from 1 of
[300, 500, 700]
+ period_ns += (3000, 5000, 7000)[random.randrange(0, 3)]
+
+ run_ns = period_ns * loading / 100
+
+ f.write("\t\t\"thread%d\" : {\n" % i)
+ f.write("\t\t\t\"loop\" : -1,\n")
+ f.write("\t\t\t\"run\" : %d,\n" % run_ns)
+ f.write("\t\t\t\"timer\" : { \"ref\" : \"tick\", \"period\" : %d },\n"
% period_ns)
+ f.write("\t\t},\n")
+
+ f.write("\t},\n")
+ f.write("}\n")
+ return
+
+
+if __name__ == '__main__':
+ parse_options()
+ generate_workload()
--
1.9.1
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