Index: usr.bin/ministat/ministat.1
===================================================================
--- usr.bin/ministat/ministat.1
+++ usr.bin/ministat/ministat.1
@@ -1,5 +1,6 @@
 .\"
 .\" Copyright (c) 2007 Poul-Henning Kamp
+.\" Copyright 2015 Netflix, Inc.
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -25,7 +26,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd November 10, 2012
+.Dd July 4, 2015
 .Dt MINISTAT 1
 .Os
 .Sh NAME
@@ -33,7 +34,7 @@
 .Nd statistics utility
 .Sh SYNOPSIS
 .Nm
-.Op Fl Ans
+.Op Fl Ains
 .Op Fl C Ar column
 .Op Fl c Ar confidence_level
 .Op Fl d Ar delimiter
@@ -50,6 +51,10 @@
 .It Fl A
 Just report the statistics of the input and relative comparisons,
 suppress the ASCII-art plot.
+.It Fl i
+All values are inverted (1/x) when they are added.
+This is useful for turning a set of times (seconds) into per seconds
+(aka throughput).
 .It Fl n
 Just report the raw statistics of the input, suppress the ASCII-art plot
 and the relative comparisons.
Index: usr.bin/ministat/ministat.c
===================================================================
--- usr.bin/ministat/ministat.c
+++ usr.bin/ministat/ministat.c
@@ -447,7 +447,7 @@
 }
 
 static struct dataset *
-ReadSet(const char *n, int column, const char *delim)
+ReadSet(const char *n, int column, const char *delim, int invert)
 {
 	FILE *f;
 	char buf[BUFSIZ], *p, *t;
@@ -488,8 +488,11 @@
 		d = strtod(t, &p);
 		if (p != NULL && *p != '\0')
 			err(2, "Invalid data on line %d in %s\n", line, n);
-		if (*buf != '\0')
+		if (*buf != '\0') {
+			if (invert)
+				d = 1 / d;
 			AddPoint(s, d);
+		}
 	}
 	fclose(f);
 	if (s->n < 3) {
@@ -508,7 +511,7 @@
 
 	fprintf(stderr, "%s\n", whine);
 	fprintf(stderr,
-	    "Usage: ministat [-C column] [-c confidence] [-d delimiter(s)] [-Ans] [-w width] [file [file ...]]\n");
+	    "Usage: ministat [-C column] [-c confidence] [-d delimiter(s)] [-Ains] [-w width] [file [file ...]]\n");
 	fprintf(stderr, "\tconfidence = {");
 	for (i = 0; i < NCONF; i++) {
 		fprintf(stderr, "%s%g%%",
@@ -519,6 +522,7 @@
 	fprintf(stderr, "\t-A : print statistics only. suppress the graph.\n");
 	fprintf(stderr, "\t-C : column number to extract (starts and defaults to 1)\n");
 	fprintf(stderr, "\t-d : delimiter(s) string, default to \" \\t\"\n");
+	fprintf(stderr, "\t-i : invert data, all data will be 1/x\n");
 	fprintf(stderr, "\t-n : print summary statistics only, no graph/test\n");
 	fprintf(stderr, "\t-s : print avg/median/stddev bars on separate lines\n");
 	fprintf(stderr, "\t-w : width of graph/test output (default 74 or terminal width)\n");
@@ -535,8 +539,9 @@
 	char *p;
 	int c, i, ci;
 	int column = 1;
-	int flag_s = 0;
+	int flag_i = 0;
 	int flag_n = 0;
+	int flag_s = 0;
 	int termwidth = 74;
 	int suppress_plot = 0;
 
@@ -551,7 +556,7 @@
 	}
 
 	ci = -1;
-	while ((c = getopt(argc, argv, "AC:c:d:snw:")) != -1)
+	while ((c = getopt(argc, argv, "AC:c:d:insw:")) != -1)
 		switch (c) {
 		case 'A':
 			suppress_plot = 1;
@@ -578,6 +583,9 @@
 				usage("Can't use empty delimiter string");
 			delim = optarg;
 			break;
+		case 'i':
+			flag_i = 1;
+			break;
 		case 'n':
 			flag_n = 1;
 			break;
@@ -601,14 +609,14 @@
 	argv += optind;
 
 	if (argc == 0) {
-		ds[0] = ReadSet("-", column, delim);
+		ds[0] = ReadSet("-", column, delim, flag_i);
 		nds = 1;
 	} else {
 		if (argc > (MAX_DS - 1))
 			usage("Too many datasets.");
 		nds = argc;
 		for (i = 0; i < nds; i++)
-			ds[i] = ReadSet(argv[i], column, delim);
+			ds[i] = ReadSet(argv[i], column, delim, flag_i);
 	}
 
 	for (i = 0; i < nds; i++)