X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=t%2Fgenzipf.c;h=c5f098c4c606eceb26072048fa398cfb31bfedda;hp=3cc93e6d7f080624a3749df162f7aaefc50908ef;hb=ad1f90aa84ba96916d02043958ee416a499f3f25;hpb=355934b7ed82d13a5bfc043e2243013fd1e4e5bd

diff --git a/t/genzipf.c b/t/genzipf.c
index 3cc93e6d..c5f098c4 100644
--- a/t/genzipf.c
+++ b/t/genzipf.c
@@ -78,13 +78,29 @@ static struct node *hash_insert(struct node *n, unsigned long long val)
 	return n;
 }
 
+static void usage(void)
+{
+	printf("genzipf: test zipf/pareto values for fio input\n");
+	printf("\t-h\tThis help screen\n");
+	printf("\t-p\tGenerate size of data set that are hit by this percentage\n");
+	printf("\t-t\tDistribution type (zipf or pareto)\n");
+	printf("\t-i\tDistribution algorithm input (zipf theta or pareto power)\n");
+	printf("\t-b\tBlock size of a given range (in bytes)\n");
+	printf("\t-g\tSize of data set (in gigabytes)\n");
+	printf("\t-o\tNumber of output columns\n");
+	printf("\t-c\tOutput ranges in CSV format\n");
+}
+
 static int parse_options(int argc, char *argv[])
 {
-	const char *optstring = "t:g:i:o:b:p:c";
+	const char *optstring = "t:g:i:o:b:p:ch";
 	int c, dist_val_set = 0;
 
 	while ((c = getopt(argc, argv, optstring)) != -1) {
 		switch (c) {
+		case 'h':
+			usage();
+			return 1;
 		case 'p':
 			percentage = atof(optarg);
 			break;