From 40dba09bd40ada9b216a75ed355c9c1ebd5f9432 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se>
Date: Sun, 2 Oct 2005 22:42:23 +0200
Subject: [PATCH] Now display cycles/byte, if the -f option is used to say what
the clock frequency is.
Rev: src/nettle/examples/nettle-benchmark.c:1.14
---
examples/nettle-benchmark.c | 39 +++++++++++++++++++++++++++++++++++--
1 file changed, 37 insertions(+), 2 deletions(-)
diff --git a/examples/nettle-benchmark.c b/examples/nettle-benchmark.c
index 9b386757..b3def450 100644
--- a/examples/nettle-benchmark.c
+++ b/examples/nettle-benchmark.c
@@ -36,6 +36,9 @@
#include <time.h>
+/* For getopt */
+#include <unistd.h>
+
#include "aes.h"
#include "arcfour.h"
#include "blowfish.h"
@@ -49,6 +52,7 @@
#include "cbc.h"
+static double frequency = 0.0;
/* Process BENCH_BLOCK bytes at a time, for BENCH_INTERVAL clocks. */
#define BENCH_BLOCK 10240
@@ -160,13 +164,25 @@ init_key(unsigned length,
key[i] = i;
}
+static void
+header(void)
+{
+ printf("%18s %11s Mbyte/s%s\n",
+ "Algorithm", "mode",
+ frequency > 0.0 ? " cycles/byte" : "");
+}
+
static void
display(const char *name, const char *mode,
double time)
{
- printf("%18s (%s): %.3f MB/s\n",
+ printf("%18s %11s %7.1f",
name, mode,
BENCH_BLOCK / (time * 1048576.0));
+ if (frequency > 0.0)
+ printf(" %11.1f", time * frequency / BENCH_BLOCK);
+
+ printf("\n");
}
static void *
@@ -194,7 +210,7 @@ time_hash(const struct nettle_hash *hash)
init_data(data);
hash->init(info.ctx);
- display(hash->name, "Update",
+ display(hash->name, "update",
time_function(bench_hash, &info));
free(info.ctx);
@@ -291,6 +307,7 @@ int
main(int argc UNUSED, char **argv UNUSED)
{
unsigned i;
+ int c;
const struct nettle_hash *hashes[] =
{
@@ -317,6 +334,24 @@ main(int argc UNUSED, char **argv UNUSED)
NULL
};
+ while ( (c = getopt(argc, argv, "f:")) != -1)
+ switch (c)
+ {
+ case 'f':
+ frequency = atof(optarg);
+ if (frequency > 0.0)
+ break;
+
+ case ':': case '?':
+ fprintf(stderr, "Usage: nettle-benchmark [-f clock frequency]\n");
+ return EXIT_FAILURE;
+
+ default:
+ abort();
+ }
+
+ header();
+
for (i = 0; hashes[i]; i++)
time_hash(hashes[i]);
--
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